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Recent progress on copper catalysts with different surface states for CO_(2)electroreduction
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作者 Wenjun Zhang Yang Yang +1 位作者 Donggang Guo Lu Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第1期10-27,I0001,共19页
The electrochemical carbon dioxide reduction reaction(eCO_(2)RR),which converts CO_(2)into various hydrocarbons or alcohols,has been extensively researched because it promises a sustainable energy economy.However,only... The electrochemical carbon dioxide reduction reaction(eCO_(2)RR),which converts CO_(2)into various hydrocarbons or alcohols,has been extensively researched because it promises a sustainable energy economy.However,only copper(Cu)can currently achieve stable and efficient hydrocarbon conversion in the eCO_(2)RR.Therefore,understanding the catalytic mechanisms and summarizing the research progress on synthesis strategies of Cu catalysts are essential for the eCO_(2)RR.This paper reviews Cu catalysts with different surface states of Cu catalysts:oxide-derived Cu,Cu nanoparticles,Cu single atoms,and Cu nanoclusters.It then reviews the development and progress of different Cu-catalyst preparation methods in recent years,focusing on the activity and selectivity of materials.Besides revealing the tendencies of catalytic selection and deep reactive mechanisms of Cu catalysts with four different surface states,this review can guide the subsequent construction of catalysts and provides an understanding of catalytic mechanisms. 展开更多
关键词 eCO_(2)RR Oxide-derived Cu Cu nanoparticles Cu single atoms Cu nanoclusters
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OsMYB84,a transcriptional regulator of OsCOPT2 and OsHMA5,modulates copper uptake and transport and yield production in rice
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作者 Jingli Ding Chenchen Ji +6 位作者 Lu Yu Chuang Wang Guangda Ding Sheliang Wang Lei Shi Fangsen Xu Hongmei Cai 《The Crop Journal》 SCIE CSCD 2024年第2期456-469,共14页
Transcription factors regulating crop uptake and translocation of the micronutrient Cu have not been identified.We isolated a novel R2R3-MYB transcription factor,OsMYB84,and showed that it was a positive regulator inv... Transcription factors regulating crop uptake and translocation of the micronutrient Cu have not been identified.We isolated a novel R2R3-MYB transcription factor,OsMYB84,and showed that it was a positive regulator involved in uptake and transport of Cu via activation of OsCOPT2 and OsHMA expression.OsMYB84 was highly expressed in roots and anthers and induced by Cu.Overexpression of OsMYB84 promoted uptake and root-to-shoot translocation of Cu in rice,facilitated Cu distribution into grain and increased grain yield.In contrast,mutation of OsMYB84 reduced Cu concentration in xylem sap.OsMYB84 bound to the promoter region of OsCOPT2 and OsHMA5 and upregulated their expression.OsCOPT2 mutants showed reduced uptake of Cu and OsHMA5 overexpression lines showed increased root-to-shoot translocation of Cu. 展开更多
关键词 OsMYB84 OsCOPT2 OsHMA5 copper RICE
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CO_(2) hydrogenation to methanol over the copper promoted In_(2)O_(3) catalyst
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作者 Rui Zou Chenyang Shen +4 位作者 Kaihang Sun Xinbin Ma Zhuoshi Li Maoshuai Li Chang-Jun Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第6期135-145,I0004,共12页
The metal promoted In_(2)O_(3) catalysts for CO_(2) hydrogenation to methanol have attracted wide attention because of their high activity with high methanol selectivity.However,there was still no experimental confirm... The metal promoted In_(2)O_(3) catalysts for CO_(2) hydrogenation to methanol have attracted wide attention because of their high activity with high methanol selectivity.However,there was still no experimental confirmation if copper could be a good promoter for In_(2)O_(3).Herein,the Cu promoted In_(2)O_(3) catalyst was prepared using a deposition-precipitation method.Such prepared Cu/In_(2)O_(3) catalyst shows significantly higher CO_(2) conversion and space time yield(STY)of methanol,compared to the un-promoted In_(2)O_(3) catalyst.The loading of Cu facilitates the activation of both H_(2) and CO_(2) with the interface between the Cu cluster and defective In_(2)O_(3) as the active site.The Cu/In_(2)O_(3) catalyst takes the CO hydrogenation pathway for methanol synthesis from CO_(2) hydrogenation.It exhibits a unique size effect on the CO adsorption.At temperatures below 250℃,CO adsorption on Cu/In_(2)O_(3) is stronger than that on In_(2)O_(3),causing higher methanol selectivity.With increasing temperatu res,the Cu catalyst aggregates,which leads to the formation of weak CO adsorption site and causes a decrease in the methanol selectivity.Compared with other metal promoted In_(2)O_(3) catalysts,it can be concluded that the catalyst with stronger CO adsorption possesses higher methanol selectivity. 展开更多
关键词 CO_(2)hydrogenation METHANOL Cu In_(2)O_(3) CO SELECTIVITY DFT
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Nitrogen-doping boosts ^(*)CO utilization and H_(2)O activation on copper for improving CO_(2) reduction to C_(2+) products
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作者 Yisen Yang Zhonghao Tan +5 位作者 Jianling Zhang Jie Yang Renjie Zhang Sha Wang Yi Song Zhuizhui Su 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第9期1459-1465,共7页
To improve the electrocatalytic transformation of carbon dioxide (CO_(2)) to multi-carbon (C_(2+)) products is of great importance.Here we developed a nitrogen-doped Cu catalyst,by which the maximum C_(2+) Faradaic ef... To improve the electrocatalytic transformation of carbon dioxide (CO_(2)) to multi-carbon (C_(2+)) products is of great importance.Here we developed a nitrogen-doped Cu catalyst,by which the maximum C_(2+) Faradaic efficiency can reach 72.7%in flow-cell system,with the partial current density reaching 0.62 A cm^(-2).The in situ Raman spectra demonstrate that the *CO adsorption can be strengthened on such a N-doped Cu catalyst,thus promoting the *CO utilization in the subsequent C–C coupling step.Simultaneously,the water activation can be well enhanced by N doping on Cu catalyst.Owing to the synergistic effects,the selectivity and activity for C_(2+) products over the N-deoped Cu catalyst are much improved. 展开更多
关键词 Electrocatalytic CO_(2)reduction reaction copper catalyst DOPING Multi-carbon products In situ Raman measurement
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Internal electric field modulation by copper vacancy concentration of cuprous sulfide nanosheets for enhanced selective CO_(2) photoreduction
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作者 Xian Shi Weidong Dai +4 位作者 Xiaoqian Li Yang Bai Qin Ren Yao Lei Xing'an Dong 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第4期324-330,共7页
Although the internal electric field(IEF)of photocatalysts is acknowledged as a potent driving force for photocharge separation,modulating the IEF intensity to achieve enhanced photocatalytic performances remains a ch... Although the internal electric field(IEF)of photocatalysts is acknowledged as a potent driving force for photocharge separation,modulating the IEF intensity to achieve enhanced photocatalytic performances remains a challenge.Herein,cuprous sulfide nanosheets with different Cu vacancy concentration were employed to study IEF modulation and corresponding direct charge transfer.Among the samples,Cu_(1.8)S nanosheets possessed intensified IEF intensity compared with those of Cu_(2)S and Cu_(1.95)S nanosheets,suggesting that an enhanced IEF intensity could be achieved by introducing more Cu vacancies.This intensified IEF of Cu_(1.8)S nanosheets induced numerous photogenerated electrons to migrate to its surface,and the dissociative electrons were then captured by Cu vacancies,resulting in efficient charge separation spatially.In addition,the Cu vacancies on Cu_(1.8)S nanosheets accumulated electrons as active sites to lower the energy barrier of rate-determining step of CO_(2)photoreduction,leading to the selective conversion of CO_(2)to CO.Herein,the manipulation of IEF intensity through Cu vacancy concentration regulation of cuprous sulfide photocatalysts for efficient charge separation has been discussed,providing a scientific strategy to rationally improve photocata lytic performances for solar energy conversion. 展开更多
关键词 Internal electric field intensity Cuprous sulfide photocatalysts Cu vacancies Charge separation Selective CO_(2) photoreduction
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三种改性小麦秸秆生物炭表征及其对Cu2+的吸附性能 被引量:8
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作者 杨婷婷 黄艳艳 +4 位作者 柳维扬 张婧旻 杨红竹 李建宏 林清火 《农业工程学报》 EI CAS CSCD 北大核心 2023年第8期222-230,共9页
为研究改性生物炭在水溶液中对Cu2+的吸附性能,利用硅酸钠溶液、氯化镁溶液、过氧化氢溶液制备了3种不同改性小麦秸秆生物炭,通过使用扫描电镜-X射线能量色散光谱(scanning electron microscopy combined with energy dispersive X-ray ... 为研究改性生物炭在水溶液中对Cu2+的吸附性能,利用硅酸钠溶液、氯化镁溶液、过氧化氢溶液制备了3种不同改性小麦秸秆生物炭,通过使用扫描电镜-X射线能量色散光谱(scanning electron microscopy combined with energy dispersive X-ray spectroscopy,SEM-EDS)和傅里叶红外光谱(Fourier infrared spectroscopy,FTIR)等技术对改性前后的生物炭进行表征分析,探究其表面形貌、官能团等性质变化。硅酸钠改性生物炭(sodium silicate modified biochar,SBC)的比表面积与孔容最大,分别为43.69 m^(2)/g、5.30 cm^(3)/g,比未改性生物炭(biochar,BC)(6.02 m^(2)/g、1.40 cm^(3)/g)分别增加了6.25、2.79倍。由SEM-EDS结果表明,改性生物炭均出现C元素质量分数下降、O元素质量分数增加的现象,其中,SBC的C元素和O元素质量分数变化最大,且SBC和氯化镁改性生物炭(magnesium chloride modified biochar,MBC)上负载了大量含Si和Mg的颗粒。FTIR结果表明,改性处理均能增强官能团的峰值,硅酸钠改性增强程度最大。另外,过氧化氢改性生物炭(hydrogen peroxide modified biochar,HBC)、BC、MBC和SBC对Cu2+的吸附动力学过程更符合准一级动力学模型,BC、MBC、SBC对Cu2+的等温吸附过程更符合Langmuir模型,HBC对Cu2+的等温吸附过程更符合Freundlich模型。分析吸附模型参数可知,改性生物炭MBC、SBC和HBC中,SBC对Cu2+的吸附能力更强,其理论吸附量可以达到230.20 mg/g,该结果可为改性生物炭对Cu2+污染水体的治理提供理论依据。 展开更多
关键词 生物炭 化学改性 表征技术 吸附特性 铜离子
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基于比色化学传感器定量检测土壤中可交换态Cu2+的研究
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作者 刘方园 王诗乐 +2 位作者 于景洋 刘颖 刘仁涛 《中国土壤与肥料》 CAS CSCD 北大核心 2023年第1期240-246,共7页
基于比色化学传感器的特性,通过溶液颜色视觉变化的定性和紫外-可见分光光度法(UV-Vis spectrophotometry)的定量用于可视化检测土壤中可交换态Cu^(2+)的含量。将2~50 mmol/L的Cu(NO_(3))_(2)溶液掺入到蒙脱土和高岭土中,并且从铜矿区... 基于比色化学传感器的特性,通过溶液颜色视觉变化的定性和紫外-可见分光光度法(UV-Vis spectrophotometry)的定量用于可视化检测土壤中可交换态Cu^(2+)的含量。将2~50 mmol/L的Cu(NO_(3))_(2)溶液掺入到蒙脱土和高岭土中,并且从铜矿区内采集了受污染的土壤样品。基于氯化钙阳离子交换法提取可交换的Cu^(2+),使用化学传感器通过UV-Vis分光光度法测定溶液中的Cu^(2+)浓度,并与传统的电感耦合等离子体质谱(Inductively Coupled Plasma Mass Spectrometry,ICP-MS)法进行比较分析。结果表明,在受污染的土壤中最低检出浓度为0.030 mmol/L,溶液颜色变化肉眼可辨,能够达到可视化。首次提出了对于比色化学传感器应用于土壤体系中基于CaCl_(2)提取的可交换态Cu^(2+)的定量分析方法,能够对土壤中有害重金属元素的可视化定量检测提供一定的理论基础。 展开更多
关键词 土壤 可交换态cu2+ 比色化学传感器 紫外-可见分光光度法
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Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit,South Tibet 被引量:2
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作者 Peng-liang Yu Ting Qu +3 位作者 Ri-zheng He Jian-li Liu Su-fen Wang Xiao-long Chen 《China Geology》 CAS CSCD 2023年第1期37-49,共13页
The Jiama porphyry copper deposit in Tibet is one of the proven supergiant copper deposits in the Qinghai-Tibet Plateau at present,with the reserves of geological resources equivalent to nearly 20×10^(6) t.Howeve... The Jiama porphyry copper deposit in Tibet is one of the proven supergiant copper deposits in the Qinghai-Tibet Plateau at present,with the reserves of geological resources equivalent to nearly 20×10^(6) t.However,it features wavy and steep terrain,leading to extremely difficult field operation and heavy interference.This study attempts to determine the effects of the tensor controlled-source audiomagnetotellurics(CSAMT)with high-power orthogonal signal sources(also referred to as the high-power tensor CSAMT)when it is applied to the deep geophysical exploration in plateaus with complex terrain and mining areas with strong interference.The test results show that the high current provided by the highpower tensor CSAMT not only greatly improved the signal-to-noise ratio but also guaranteed that effective signals were received in the case of a long transmitter-receiver distance.Meanwhile,the tensor data better described the anisotropy of deep geologic bodies.In addition,the tests also show that when the transmitting current reaches 60 A,it is still guaranteed that strong enough signals can be received in the case of the transmitter-receiver distance of about 25 km,sounding curves show no near field effect,and effective exploration depth can reach 3 km.The 2D inversion results are roughly consistent with drilling results,indicating that the high-power tensor CSAMT can be used to achieve nearly actual characteristics of underground electrical structures.Therefore,this method has great potential for application in deep geophysical exploration in plateaus and mining areas with complex terrain and strong interference,respectively.This study not only serves as important guidance on the prospecting in the Qinghai-Tibet Plateau but also can be used as positive references for deep mineral exploration in other areas. 展开更多
关键词 Jiama porphyry copper deposit Supergiant copper polymetallic deposit Tensor CSAMT of 150 kw High power 2D inversion Deep prospecting Mineral exploration engineering Xizang(Tibet)
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Synergistic regulation of hydrophobicity and basicity for copper hydroxide-derived copper to promote the CO_(2)electroreduction reaction 被引量:3
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作者 Limin Zhou Chenghang Li +8 位作者 Jing-Jing Lv Wei Wang Shaojun Zhu Jun Li Yifei Yuan Zheng-Jun Wang Qingcheng Zhang Huile Jin Shun Wang 《Carbon Energy》 SCIE CSCD 2023年第6期72-81,共10页
A simple method was proposed to activate alkaline Cu(OH)_(2)with an acidic ionomer,Nafion,to regulate its surface microenvironment,including hydrophobicity and local basicity.In particular,the direct complete neutrali... A simple method was proposed to activate alkaline Cu(OH)_(2)with an acidic ionomer,Nafion,to regulate its surface microenvironment,including hydrophobicity and local basicity.In particular,the direct complete neutralization reaction between Cu(OH)_(2)and Nafion in aqueous solution induces the exposing of vast anions which can exclude the in-situ-formed hydroxides and raise the local basicity.Remarkably,the optimal Nafionactivated Cu(OH)_(2)-derived Cu can efficiently suppress the hydrogen evolution reaction(HER)and improve the selectivity for multi-carbon products in the CO_(2)electroreduction reaction(eCO_(2)RR).The H2 Faradaic efficiency(FE)decreased to 11%at a current density of 300 mA/cm2(−0.76 V vs.RHE)in a flow cell,while the bare one with H2 had an FE of 40%.The total eCO_(2)RR FE reaches as high as 83%,along with an evidently increased C2H4 FE of 44%as compared with the bare one(24%),and good stability(8000 s),surpassing that of most of the reported Cu(OH)_(2)-derived Cu.The experimental and theoretical results both show that the strong hydrophobicity and high local basicity jointly boosted the eCO_(2)RR as acquired by felicitously introducing ionomer on the Cu(OH)_(2)-derived Cu surface. 展开更多
关键词 CO_(2)electroreduction reaction Cu(OH)_(2)@Nafion flow cell IONOMERS multi-carbon products
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Copper Indium Sulfide Enables Li-CO_(2)Batteries with Boosted Reaction Kinetics and Cycling Stability 被引量:1
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作者 Lin Chen Jingwen Zhou +3 位作者 Junxiang Zhang Guicai Qi Bin Wang Jianli Cheng 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第5期372-380,共9页
High energy density Li-CO_(2)batteries have attracted much attention owing to the"two birds with one stone"feature in fixing greenhouse gas CO_(2)and providing renewable energy.However,poor reversibility of ... High energy density Li-CO_(2)batteries have attracted much attention owing to the"two birds with one stone"feature in fixing greenhouse gas CO_(2)and providing renewable energy.However,poor reversibility of the discharge product Li_(2)CO_(3)is one of the main problems that limit its application,resulting in poor cycling stability and severe polarization.Herein,copper indium sulfide(CIS),a semiconducting non-precious metal sulfide,is fabricated as cathode catalysts for high-performance Li-CO_(2)batteries.Combined with the synergistic effect of bimetallic valence bonding and coordinated electron transfer,Li-CO_(2)batteries using CIS cathodes exhibit high full specific discharge capacity,excellent rate capability and cycle stability,namely it delivers a high specific full discharge capacity of 8878μAh cm^(-2),runs steadily from 10 to 100μA cm^(-2),and performs a stable long-term cycling behavior(>1050 h)under a high energy efficiency of 84%and a low charge voltage of approximately 3.4 V at 20μA cm^(-2)within 100μAh cm^(-2).In addition,a flexible Li-CO_(2)pouch cell is constructed to reveal the potential of employing CIS to fabricate flexible high energy storage devices in practical applications.This work shows a promising development pathway toward next-generation sustainable energy storage devices. 展开更多
关键词 copper indium sulfides cycling stability Li-CO_(2)batteries reaction kinetics
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Double open mouse-like terpyridine parts based amphiphilic ionic molecules displaying strengthened chemical adsorption for anticorrosion of copper in sulfuric acid solution
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作者 Yueting Shi Junhai Zhao +3 位作者 Lingli Chen Hongru Li Shengtao Zhang Fang Gao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第5期233-246,共14页
In this study,the benign target double terpyridine parts based amphiphilic ionic molecules(AIMs 1,2)and the reference single terpyridine segment included AIMs(AIMs 3,4)were synthesized through a multi-step method,and ... In this study,the benign target double terpyridine parts based amphiphilic ionic molecules(AIMs 1,2)and the reference single terpyridine segment included AIMs(AIMs 3,4)were synthesized through a multi-step method,and the molecular structures were fully characterized.The excellent anticorrosion of the target AIMs for copper surface in H_(2)SO_(4) solution was demonstrated by the electrochemistry analysis,which was more superior over those of the reference AIMs.The standard adsorption free energy changes of the target AIMs calculated by the adsorption isotherms were lower than -40 kJ·mol^(-1),suggesting an intensified chemical adsorption on metal surface.The molecular modeling and molecular dynamic computation of the studied AIMs were performed,demonstrating that the target AIMs exhibited lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps and greater adsorption energies than the reference ones.The chemical adsorption of the AIMs on metal surface was revealed by various spectroscopic methods including scanning electron microscopy,atomic force microscopy,Fourier transform infrared spectroscopy,attenuated total reflection infrared spectroscopy,Raman and X-ray diffraction. 展开更多
关键词 Amphiphilic ionic molecule Adsorption Corrosion Electrochemistry copper H_(2)SO_(4)solution
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Preparation of B_(2)O_(3)-ZnO-SiO_(2)Glass and Sintering Densification of Copper Terminal Electrode Applied in Multilayer Ceramic Capacitors
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作者 YUE Yi LI Hong +6 位作者 CAO Xiuhua ZHANG Xuehui HUANG Jun HUANG Xuye ZHANG Yongqiang XU Ruipeng XIONG Dehua 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2023年第5期960-968,共9页
B_(2)O_(3)-Zn O-SiO_(2)(BZS)glass containing Cu O with excellent acid resistance,wetting properties,and high-temperature sintering density was prepared by high temperature melting method and then applied in copper ter... B_(2)O_(3)-Zn O-SiO_(2)(BZS)glass containing Cu O with excellent acid resistance,wetting properties,and high-temperature sintering density was prepared by high temperature melting method and then applied in copper terminal electrode for multilayer ceramic capacitors(MLCC)applications.The structure and property characterization of B_(2)O_(3)-Zn O-SiO_(2)glass,including X-ray diffraction,FTIR,scanning electron microscopy,high-temperature microscopy,and differential scanning calorimetry,indicated that the addition of CuO improved the glass’s acid resistance and glass-forming ability.The wettability and acid resistance of this glass were found to be excellent when CuO content was 1.50 wt%.Compared to BZS glass,the CuO-added glass exhibited excellent wettability to copper powder and corrosion resistance to the plating solution.The sintered copper electrode films prepared using the glass with CuO addition had better densification and lower sintering temperature of 750℃.Further analysis of the sintering mechanism reveals that the flowability and wettability of the glass significantly impact the sintering densification of the copper terminal electrodes. 展开更多
关键词 B_(2)O_(3)-ZnO-SiO_(2)(BZS) low melting glass MLCC DENSIFICATION copper terminal electrode
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Analysis of inhomogeneity of solidified microstructure of continuous casting copper tubular billet based on factor analysis
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作者 Jin-song Liu Chao-rui Shan +3 位作者 Da-yong Chen Hong-wu Song Chuan-lai Chen Yun-yue Chen 《China Foundry》 SCIE EI CAS CSCD 2023年第6期526-536,共11页
The horizontal continuous casting process,the initial step in TP2 copper tubular processing,directly determines the microstructure and properties of copper tubular.However,the process parameters of the continuous cast... The horizontal continuous casting process,the initial step in TP2 copper tubular processing,directly determines the microstructure and properties of copper tubular.However,the process parameters of the continuous casting characterize time variation,multiple disturbances and strong coupling.As a consequence,their influence on a casting billet is difficult to be determined.Due to the above issues,the common factor and special factor analysis of the factor analysis model were used in this study,and the casting experiment and billet metallographic experiment were carried out to diagnose and analyze the reason of the microstructure inhomogeneity.The multiple process parameters were studied and classified using common factor analysis,2 the cast billets with abnormal microstructures were identified by GT^(2) statistics,and the most important factors affecting the microstructural homogeneity were found by special factor analysis.The calculated and experimental results show that the principal parameters influencing the inhomogeneity of solidified microstructure are the primary inlet water pressure and the primary outlet water temperature.According to the consequence of the above investigation,the inhomogeneity of the copper billet microstructure can be effectively improved when the process parameters are controlled and adjusted. 展开更多
关键词 TP2 copper tubular billet horizontal continuous casting factor analysis microstructure inhomogeneity of casting billet quality diagnosis
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Electrochemical CO_(2) reduction:Progress and opportunity with alloying copper
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作者 Mao Ding Zhaoyang Chen +6 位作者 Chunxiao Liu Youpeng Wang Chengbo Li Xu Li Tingting Zheng Qiu Jiang Chuan Xia 《Materials Reports(Energy)》 2023年第1期35-50,I0002,共17页
Electroreduction of carbon dioxide(CO_(2)) into value-added chemicals offers an entrancing approach to main-taining the global carbon cycle and eliminating environmental threats.A key obstacle to achieving long-term a... Electroreduction of carbon dioxide(CO_(2)) into value-added chemicals offers an entrancing approach to main-taining the global carbon cycle and eliminating environmental threats.A key obstacle to achieving long-term and large-scale implementation of electrochemical CO_(2) reduction technology is the lack of active and selective cat-alysts.Copper(Cu)is one of the few candidates that can facilitate C–C coupling to obtain high-energy oxygenates and hydrocarbons beyond carbon monoxide(CO),but it suffers from poor selectivity for products of interest and high overpotentials.Alloying is an effective way to break the linear scaling relations and uniquely manipulate the reactivity and selectivity,which is hard to achieve by using monometallic compositions alone.By alloying Cu with other metals,one could change the catalytic properties of the catalyst by tuning the local electronic structure and modulating the adsorption strength of the reaction intermediates,thus improving the catalytic activity and selectivity.In this review,we focus on the recently developed Cu-based alloy catalysts(including conventional alloys,high-entropy alloys and single-atom alloys)that have been applied in electrocatalytic CO_(2) reduction(ECR).Theoretical calculations and experimental advances in understanding the key rate-limiting and selectivity-determining steps in those alloys are summarized,with a particular focus on identifying binding energy de-scriptors and the dynamic product formation mechanisms.In addition,we outline the opportunities and chal-lenges in the fundamental understanding of ECR by recommending advanced in-situ characterization techniques and standardized electrochemical methods and offer atomic-level design principles for steering the reaction pathways to the desired products. 展开更多
关键词 ELECTROCATALYSIS CO_(2) reduction Selectivity copper alloys High-entropy alloys Single-atom alloys
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基于层状锌铝复合氢氧化物前驱体优化制备Cu/ZnO/Al_(2)O_(3)气相醛加氢催化剂
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作者 白鹏 刘函澎 +6 位作者 陈雪娇 张永辉 赵振祥 吴萍萍 黄德鑫 吴先锋 张志华 《中国石油大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第4期224-232,共9页
以偏铝酸钠作为铝源通过一步法、两步法和混合法引入Cu制备基于ZnAl-LDH前驱体的3种不同的Cu/ZnO/Al_(2)O_(3)催化剂,对催化剂及其前驱体结构性质进行表征,结合辛烯醛(2-乙基-2-己烯醛,EPA)加氢反应评价结果,探究不同制备方法、不同铝... 以偏铝酸钠作为铝源通过一步法、两步法和混合法引入Cu制备基于ZnAl-LDH前驱体的3种不同的Cu/ZnO/Al_(2)O_(3)催化剂,对催化剂及其前驱体结构性质进行表征,结合辛烯醛(2-乙基-2-己烯醛,EPA)加氢反应评价结果,探究不同制备方法、不同铝的引入方式对ZnAl_(2)O_(4)尖晶石形成的影响,考察不同条件下所得催化剂的结构与反应性能之间的构效关系。结果表明:与工业催化剂相比,在辛烯醛气相加氢反应中混合法制得的催化剂与工业催化剂活性相当,产物选择性在空速1.5 h^(-1)时高于工业剂1.9%,在空速4.0 h^(-1)时高于工业剂2.5%;以偏铝酸钠作为铝源制备的ZnAl-LDH前驱物大大提高锌铝结合效率,减少非结合Al_(2)O_(3)的产生,提高产物选择性,同时实现380℃低温焙烧条件下ZnAl-LDH向ZnAl_(2)O_(4)尖晶石的转变,避免传统的高温焙烧过程中CuO的烧结。 展开更多
关键词 Cu/ZnO/Al_(2)O_(3)催化剂 ZnAl_(2)O_(4)尖晶石 ZnAl-LDH 气相醛加氢
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络合剂对固相法Cu/ZnO/In_(2)O_(3)催化剂的CO_(2)加氢制甲醇反应性能的影响
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作者 赵福真 郭孟 +2 位作者 白瑞洁 张煜华 李金林 《中南民族大学学报(自然科学版)》 CAS 2024年第4期433-438,共6页
为了促进催化剂中Cu物种的分散,在金属硝酸盐中分别加入草酸、甲酸和柠檬酸,采用固态研磨合成Cu/ZnO/In_(2)O_(3)催化剂.结果表明:草酸的加入对Cu的分散效果最好,在280℃,2 MPa,3.6 L·gcat^(-1)·h^(-1),V(H2)∶V(CO_(2))=3∶1... 为了促进催化剂中Cu物种的分散,在金属硝酸盐中分别加入草酸、甲酸和柠檬酸,采用固态研磨合成Cu/ZnO/In_(2)O_(3)催化剂.结果表明:草酸的加入对Cu的分散效果最好,在280℃,2 MPa,3.6 L·gcat^(-1)·h^(-1),V(H2)∶V(CO_(2))=3∶1时,甲醇收率最高,达到2.1 mmol·gcat^(-1)·h^(-1).但甲酸在高温下会分解为CO_(2)和H_(2),导致制备的CuO/ZnO/In_(2)O_(3)催化剂部分还原,随后此催化剂在H_(2)预处理后被过度还原,形成Cu_(3)In_(7)合金相,导致甲醇产率降低. 展开更多
关键词 CO_(2)加氢 甲醇 Cu基催化剂 氧化铟
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磁性氧化石墨烯的制备及对Cu2+吸附性能研究
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作者 李璐 贾翼飞 +2 位作者 杨霞 马慧蕾 张春芳 《造纸装备及材料》 2023年第3期69-71,共3页
通过超声分散将氧化石墨烯与Fe3O4进行复合,制备出磁性氧化石墨烯。通过XRD、Ft-IR、SEM检测表明Fe3O4成功地嵌入氧化石墨烯层间;采用单因素法研究温度、时间、Cu2+初始浓度以及pH值对吸附性能的影响,结果表明25~50℃对吸附性能影响较小... 通过超声分散将氧化石墨烯与Fe3O4进行复合,制备出磁性氧化石墨烯。通过XRD、Ft-IR、SEM检测表明Fe3O4成功地嵌入氧化石墨烯层间;采用单因素法研究温度、时间、Cu2+初始浓度以及pH值对吸附性能的影响,结果表明25~50℃对吸附性能影响较小,时间、Cu2+初始浓度以及pH值对磁性氧化石墨烯吸附性能影响较大。 展开更多
关键词 磁性 氧化石墨烯 cu2+ 吸附性能 制备工艺
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TEPA改性Cu-BTC@SiO_(2)复合气凝胶制备及其捕集CO_(2)特性研究
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作者 周刚 杨思奥 +4 位作者 王凯丽 董晓素 柳茹林 孙彪 徐翠翠 《煤炭科学技术》 EI CAS CSCD 北大核心 2024年第7期235-247,共13页
在“碳达峰、碳中和”这一国家重大战略背景下,CO_(2)捕集已经成为当前重大科技发展方向。固体吸附剂吸附法在CO_(2)的捕集过程中应用广泛,其中SiO_(2)气凝胶具有成本低、合成方法灵活、分离效率高、表面易修饰等优点。然而,SiO_(2)气... 在“碳达峰、碳中和”这一国家重大战略背景下,CO_(2)捕集已经成为当前重大科技发展方向。固体吸附剂吸附法在CO_(2)的捕集过程中应用广泛,其中SiO_(2)气凝胶具有成本低、合成方法灵活、分离效率高、表面易修饰等优点。然而,SiO_(2)气凝胶材料也存在CO_(2)/N_(2)吸附选择性低,CO_(2)吸附容量有待继续提高等缺陷。为解决上述问题,制备了一种Cu-BTC@SiO_(2)复合气凝胶CO_(2)吸附材料。首先,利用扫描电子显微镜(SEM)、傅里叶红外光谱(FTIR)和氮气吸脱附测试对材料表面化学和孔隙结构进行了系统表征。然后,通过二氧化碳吸附测试对其CO_(2)吸附量、选择性吸附、循环吸附进行了研究。最后,采用理论与试验研究结合的方法,对吸附剂的CO_(2)吸附动力学进行了研究。结果表明:Cu-BTC与SiO_(2)气凝胶具有结构协同作用,与Cu-BTC复合后的SiO_(2)气凝胶不会改变材料的Si-O-Si骨架结构,同时可以保持Cu-BTC的晶体结构不受到损坏。复合材料具有726.431 m^(2)/g的高比表面积,570.781 m^(2)/g的微孔比表面积和0.184 cm^(3)/g的高微孔体积。负载四乙烯五胺(TEPA)后CO_(2)吸附量高达3.20 mmol/g,CO_(2)/N_(2)选择性吸附系数为40.8,循环10次CO_(2)吸附循环,吸附容量仅下降14%,提高了SiO_(2)气凝胶材料的CO_(2)吸附容量和吸附选择性。Avrami分数动力学模型对吸附试验结果拟合相关系数为0.99,且Avrami指数nA为1.9表明吸附剂对CO_(2)的吸附是非均质的多层吸附,既有物理吸附又有化学吸附,且以物理吸附为主。利用具有丰富微孔结构的金属有机骨架材料Cu-BTC与SiO_(2)气凝胶进行复合,使复合材料具有分级微/介孔结构,通过增强分子间作用力(范德华力)来增强材料对CO_(2)的物理吸附;使用TEPA对材料进行浸渍改性,利用有机胺和酸性气体之间的酸碱相互作用来增强材料对CO_(2)的化学吸附。 展开更多
关键词 SiO_(2)气凝胶 Cu-BTC CO_(2)吸附 吸附动力学 碳中和
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Cu(Ⅱ)催化NaOCl氧化碘帕醇的效果和过程解析
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作者 魏红 滕锐杰 +3 位作者 郑佳欣 高美娟 钮金芬 蔡谦 《中国环境科学》 EI CAS CSCD 北大核心 2024年第6期3167-3178,共12页
本文研究Cu(Ⅱ)催化NaOCl氧化非离子型碘代X射线造影剂—碘帕醇(IPM),对IPM降解过程中Cu的回收和形态进行解析,考察Cu(Ⅱ)、NaOCl浓度和卤素离子对IPM降解效果及碘代消毒副产物-碘仿的生成影响;采用XRD、XPS分析Cu(Ⅱ)反应后的产物晶型... 本文研究Cu(Ⅱ)催化NaOCl氧化非离子型碘代X射线造影剂—碘帕醇(IPM),对IPM降解过程中Cu的回收和形态进行解析,考察Cu(Ⅱ)、NaOCl浓度和卤素离子对IPM降解效果及碘代消毒副产物-碘仿的生成影响;采用XRD、XPS分析Cu(Ⅱ)反应后的产物晶型和形态变化,结合循环伏安曲线和计时电流表征Cu(Ⅲ)的生成,推测Cu(Ⅱ)催化NaOCl氧化IPM的机理.利用HPLC/MS/MS分析中间产物,推测IPM的降解路径.结果表明,与Co(Ⅱ)、Fe(Ⅱ)、Mn(Ⅱ)相比,Cu(Ⅱ)显著提高了NaOCl的分解率和IPM的氧化效果,25℃、pH=6.71,500r/min,NaOCl和Cu(Ⅱ)浓度分别为0.5和0.05mmol/L,60min,8.0mg/L IPM的降解率达到77.51%;HO·、活性氯自由基和Cu(Ⅲ)都有助于Cu(Ⅱ)/NaOCl氧化IPM,且Cu(Ⅲ)的贡献随pH值升高而增大.NaOCl浓度在0.1~2.5mmol/L范围增加,IPM降解率增加;Cu(Ⅱ)浓度在0.005~0.5mmol/L存在适宜值.HPLC/MS/MS共检测出13种产物,IPM的降解途径主要包括:侧链酰胺键水解和氧化,碘取代、羟基加成.Cl^(−)、Br^(−)和I^(−)(1~5mmol/L)在影响IPM氧化效果的同时,Br^(-)显著促进了CHI_(3)的生成,生成量达到48.28μg/L. 展开更多
关键词 碘帕醇 Cu(Ⅱ)/NaOCl Cu(Ⅲ) 碘仿
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(Ag,Cu)/TiO_(2)汽车玻璃隔热膜的制备与表征
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作者 王宁 时方晓 《广州化工》 CAS 2024年第7期69-72,共4页
利用磁控溅射技术制备由金属(Ag,Cu)膜、介质层TiO_(2)膜组成的双层汽车玻璃隔热膜样品。利用单因素分析法考察了溅射时间、溅射功率和Ar溅射流量三个因素对(Ag,Cu)/TiO_(2)汽车玻璃隔热膜透光隔热性能的影响。实验结果表明,在在本底真... 利用磁控溅射技术制备由金属(Ag,Cu)膜、介质层TiO_(2)膜组成的双层汽车玻璃隔热膜样品。利用单因素分析法考察了溅射时间、溅射功率和Ar溅射流量三个因素对(Ag,Cu)/TiO_(2)汽车玻璃隔热膜透光隔热性能的影响。实验结果表明,在在本底真空度3×10^(-3) Pa,溅射气压2.1 Pa条件下,靶基距均为70 mm时,金属(Ag,Cu)膜溅射时间18 s,溅射功率80 W,Ar溅射流量20 sccm;介质层TiO_(2)膜溅射时间50 min,溅射功率115 W,溅射流量25 sccm时,(Ag,Cu)/TiO_(2)汽车玻璃隔热膜的透光隔热性能最佳。 展开更多
关键词 (Ag Cu)/TiO_(2)膜 汽车玻璃 隔热性能 透光率
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