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In situ grown nanoscale platinum on carbon powder as catalyst layer in proton exchange membrane fuel cells(PEMFCs) 被引量:2
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作者 Sheng Sui Xiaolong Zhuo +4 位作者 Kaihua Su Xianyong Yao Junliang Zhang Shangfeng Du Kevin Kendall 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第3期477-483,共7页
An extensive study has been conducted on the proton exchange membrane fuel cells (PEMFCs) with reducing Pt loading. This is commonly achieved by developing methods to increase the utilization of the platinum in the ... An extensive study has been conducted on the proton exchange membrane fuel cells (PEMFCs) with reducing Pt loading. This is commonly achieved by developing methods to increase the utilization of the platinum in the catalyst layer of the electrodes. In this paper, a novel process of the catalyst layers was introduced and investigated. A mixture of carbon powder and Nafion solution was sprayed on the glassy carbon electrode (GCE) to form a thin carbon layer. Then Pt particles were deposited on the surface by reducing hexachloroplatinic (IV) acid hexahydrate with methanoic acid. SEM images showed a continuous Pt gradient profile among the thickness direction of the catalytic layer by the novel method. The Pt nanowires grown are in the size of 3 nm (diameter) x l0 nm (length) by high solution TEM image. The novel catalyst layer was characterized by cyclic voltammetry (CV) and scanning electron microscope (SEM) as compared with commercial Pt/C black and Pt catalyst layer obtained from sputtering. The results showed that the platinum nanoparticles deposited on the carbon powder were highly utilized as they directly faced the gas diffusion layer and offered easy access to reactants (oxygen or hydrogen). 展开更多
关键词 PLATINUM catalyst layer carbon powder layer proton exchange membrane fuel cells
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High-performance proton exchange membrane fuel cell with ultra-low loading Pt on vertically aligned carbon nanotubes as integrated catalyst layer 被引量:3
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作者 Qing Hao Meng Chao Hao +4 位作者 Bowen Yan Bin Yang Jia Liu Pei Kang Shen Zhi Qun Tian 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第8期497-506,I0013,共11页
Reducing a Pt loading with improved power output and durability is essential to promote the large-scale application of proton exchange membrane fuel cells(PEMFCs).To achieve this goal,constructing optimized structure ... Reducing a Pt loading with improved power output and durability is essential to promote the large-scale application of proton exchange membrane fuel cells(PEMFCs).To achieve this goal,constructing optimized structure of catalyst layers with efficient mass transportation channels plays a vital role.Herein,PEMFCs with order-structured cathodic electrodes were fabricated by depositing Pt nanoparticles by Ebeam onto vertically aligned carbon nanotubes(VACNTs)growth on Al foil via plasma-enhanced chemical vapor deposition.Results demonstrate that the proportion of hydrophilic Pt-deposited region along VACNTs and residual hydrophobic region of VANCTs without Pt strongly influences the cell performance,in particular at high current densities.When Pt nanoparticles deposit on the top depth of around 600 nm on VACNTs with a length of 4.6μm,the cell shows the highest performance,compared with others with various lengths of VACNTs.It delivers a maximum power output of 1.61 W cm^(-2)(H_(2)/O_(2),150 k Pa)and 0.79 W cm^(-2)(H_(2)/Air,150 k Pa)at Pt loading of 50μg cm^(-2),exceeding most of previously reported PEMFCs with Pt loading of<100μg cm^(-2).Even though the Pt loading is down to 30μg cm^(-2)(1.36 W cm^(-2)),the performance is also better than 100μg cm^(-2)(1.24 W cm^(-2))of commercial Pt/C,and presents better stability.This excellent performance is critical attributed to the ordered hydrophobic region providing sufficient mass passages to facilitate the fast water drainage at high current densities.This work gives a new understanding for oxygen reduction reaction occurred in VACNTs-based ordered electrodes,demonstrating the most possibility to achieve a substantial reduction in Pt loading<100μg cm^(-2) without sacrificing in performance. 展开更多
关键词 proton exchange membrane fuel cells Order-structured catalyst layer Vertically aligned carbon nanotubes Ultra-low Pt loading membrane electrode assembly
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Segmented tomographic evaluation of structural degradation of carbon support in proton exchange membrane fuel cells
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作者 Jung A.Hong Min-Hyoung Jung +10 位作者 Sung Yong Cho Eun-Byeol Park Daehee Yang Young-Hoon Kim Sang-Hyeok Yang Woo-Sung Jang Jae Hyuck Jang Hyo June Lee Sungchul Lee Hu Young Jeong Young-Min Kim 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第11期359-367,I0010,共10页
The variation of the three-dimensional(3D)structure of the membrane electrode of a fuel cell during proton exchange cycling involves the corrosion/compaction of the carbon support.The increasing degradation of the car... The variation of the three-dimensional(3D)structure of the membrane electrode of a fuel cell during proton exchange cycling involves the corrosion/compaction of the carbon support.The increasing degradation of the carbon structure continuously reduces the electrocatalytic performance of proton exchange membrane fuel cells(PEM-FCs).This phenomenon can be explained by performing 3D tomographic analysis at the nanoscale.However,conventional tomographic approaches which present limited experimental feasibility,cannot perform such evaluation and have not provided sufficient structural information with statistical significance thus far.Therefore,a reliable methodology is required for the 3D geometrical evaluation of the carbon structure.Here,we propose a segmented tomographic approach which employs pore network analysis that enables the visualization of the geometrical parameters corresponding to the porous carbon structure at a high resolution.This approach can be utilized to evaluate the 3D structural degradation of the porous carbon structure after cycling in terms of local surface area,pore size distribution,and their 3D networking.These geometrical parameters of the carbon body were demonstrated to be substantially reduced owing to the cycling-induced degradation.This information enables a deeper understanding of the degradation phenomenon of carbon supports and can contribute to the development of stable PEM-FC electrodes. 展开更多
关键词 Electron tomography Fuel cell proton exchange membrane membrane electrode assembly carbon corrosion
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Processes of depositing platinum on carbon nanotubes and their effect on performance of proton exchange membrane fuel cell
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作者 YanhuiLi JunDing +3 位作者 JunfengChen ZongqiangMao CailuXu DehaiWu 《Journal of University of Science and Technology Beijing》 CSCD 2004年第4期349-353,共5页
The ultrafine platinum nanoparticles deposited on the surfaces of carbonnanotubes (Pt/CNTs) were prepared by a chemical precipitation method and used as the catalyst ofproton exchange membrane fuel cell. The depositin... The ultrafine platinum nanoparticles deposited on the surfaces of carbonnanotubes (Pt/CNTs) were prepared by a chemical precipitation method and used as the catalyst ofproton exchange membrane fuel cell. The depositing process parameters such as the solution pH value,Pt content and treatment temperature were analyzed. The experimental results show that the optimumprocess parameters to prepare Pt/CNTs are the solution pH value of 7.0, the theoretical Pt contentof 25 percent (mass fraction) and the heating temperature of 500 deg C, under the conditions thebest performance of the proton exchange membrane fuel cell can be obtained and its voltage can reach580 mV at a current density of 500 mA/cm^2. 展开更多
关键词 carbon nanotubes PLATINUM DEPOSITION proton exchange membrane fuel cell
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Nanoshell-Containing Carbon Cathode Catalyst for Proton Exchange Membrane Fuel Cell from Herbaceous Plants Lignin
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作者 Naokatsu Kannari Machiko Takigami +3 位作者 Takuya Maie Hiroyuki Honda Sayaka Kusadokoro Jun-ichi Ozaki 《Smart Grid and Renewable Energy》 2013年第7期10-15,共6页
Nanoshell-containing carbon (NSCC) is one of the Pt-surrogate catalysts for proton exchange membrane fuel cell (PEMFC) invented by us to promote oxygen reduction reaction (ORR), the cathode reaction of the cell. In th... Nanoshell-containing carbon (NSCC) is one of the Pt-surrogate catalysts for proton exchange membrane fuel cell (PEMFC) invented by us to promote oxygen reduction reaction (ORR), the cathode reaction of the cell. In the present study, we selected one of renewable resources, lignin from herbaceous plants as the carbon precursor for NSCC. The lignin was admixed with cobalt phthalocyanine (CoPc), the nanoshell (NS) forming catalyst, and then carbonized at 1000℃. Transmission electron microscopy and X-ray diffraction studies confirmed the formation of NS structure. The ORR activity of the prepared NSCC increased with the amount of CoPc, and the activity of lignin-based NSCC was higher than that of phenol-formaldehyde resin-based NSCC with the same amount of CoPc added. Surface analysis by X-ray photoelectron spectroscopy revealed no metal species on the NSCC but higher N/C ratio for the lignin-based NSCC by two folds. This study shows the possibility of lignin as a precursor of NSCC cathode catalyst for PEMFC. 展开更多
关键词 proton exchange membrane Fuel Cell Oxygen Reduction Reaction LIGNIN Nanoshell-Containing carbon
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Sulfur doped iron-nitrogen-hard carbon nanosheets as efficient and robust noble metal-free catalysts for oxygen reduction reaction in PEMFC
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作者 Bin Liu Jiawang Li +6 位作者 Bowen Yan Qi Wei Xingyu Wen Huarui Xie Huan He Pei Kang Shen Zhi Qun Tian 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第2期422-433,I0010,共13页
Transition metal-nitrogen-carbon(M-N-C)as a promising substitute for the conventional noble metalbased catalyst still suffers from low activity and durability for oxygen reduction reaction(ORR)in proton exchange membr... Transition metal-nitrogen-carbon(M-N-C)as a promising substitute for the conventional noble metalbased catalyst still suffers from low activity and durability for oxygen reduction reaction(ORR)in proton exchange membrane fuel cells(PEMFCs).To tackle the issue,herein,a new type of sulfur-doped ironnitrogen-hard carbon(S-Fe-N-HC)nanosheets with high activity and durability in acid media were developed by using a newly synthesized precursor of amide-based polymer with Fe ions based on copolymerizing two monomers of 2,5-thiophene dicarboxylic acid(TDA)as S source and 1,8-diaminonaphthalene(DAN)as N source via an amination reaction.The as-synthesized S-Fe-N-HC features highly dispersed atomic Fe Nxmoieties embedded into rich thiophene-S doped hard carbon nanosheets filled with highly twisted graphite-like microcrystals,which is distinguished from the majority of M-N-C with soft or graphitic carbon structures.These unique characteristics endow S-Fe-N-HC with high ORR activity and outstanding durability in 0.5 M H_(2)SO_(4).Its initial half-wave potential is 0.80 V and the corresponding loss is only 21 m V after 30,000 cycles.Meanwhile,its practical PEMFC performance is a maximum power output of 628.0 mW cm^(-2)and a slight power density loss is 83.0 m W cm^(-2)after 200-cycle practical operation.Additionally,theoretical calculation shows that the activity of Fe Nxmoieties on ORR can be further enhanced by sulfur doping at meta-site near FeN_(4)C.These results evidently demonstrate that the dual effect of hard carbon substrate and S doping derived from the precursor platform of amid-polymers can effectively enhance the activity and durability of Fe-N-C catalysts,providing a new guidance for developing advanced M-N-C catalysts for ORR. 展开更多
关键词 Transition metal-nitrogen-carbon Oxygen reduction reaction Hard carbon Amide based polymer reaction proton exchange membrane cells
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质子交换膜燃料电池用碳纤维纸的研究进展
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作者 倪学鹏 王燕青 +1 位作者 吴琪琳 巨安奇 《工程塑料应用》 CAS CSCD 北大核心 2024年第9期160-171,共12页
碳纤维纸是目前质子交换膜燃料电池(PEMFC)气体扩散层首选材料。基于湿法成纸技术,针对碳纤维纸原材料(短切碳纤维)在成纸过程中的分散展开分析,系统梳理了碳纤维成纸关键影响因素、碳纤维纸疏水改性及微孔层处理的方法,论述了国内外在... 碳纤维纸是目前质子交换膜燃料电池(PEMFC)气体扩散层首选材料。基于湿法成纸技术,针对碳纤维纸原材料(短切碳纤维)在成纸过程中的分散展开分析,系统梳理了碳纤维成纸关键影响因素、碳纤维纸疏水改性及微孔层处理的方法,论述了国内外在改善碳纤维纸性能方面的研究情况。最后指出,未来碳纤维纸进一步发展的关键在于其原材料的技术开发和转化应用,以及碳纤维纸制备过程中的结构-性能关系研究和碳化石墨化过程机制研究。 展开更多
关键词 质子交换膜燃料电池 气体扩散层 碳纤维纸 疏水改性 微孔层 碳纤维
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石墨化温度对质子交换膜燃料电池用碳纸性能的影响
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作者 袁晓君 王虹 +5 位作者 刘江涛 李荣年 冯勇 孙其忠 田合鑫 林献 《化工新型材料》 CAS CSCD 北大核心 2024年第6期94-97,107,共5页
以聚丙烯腈碳纤维和聚乙烯醇为原料,将湿法造纸抄造的碳纸原纸用酚醛树脂浸渍热压固化后进行碳化石墨化,制备了石墨化温度不同的燃料电池用碳纸样品,分析了碳纸的拉伸强度、透气性、水平电阻率等性能指标,并通过X射线衍射仪分析了石墨... 以聚丙烯腈碳纤维和聚乙烯醇为原料,将湿法造纸抄造的碳纸原纸用酚醛树脂浸渍热压固化后进行碳化石墨化,制备了石墨化温度不同的燃料电池用碳纸样品,分析了碳纸的拉伸强度、透气性、水平电阻率等性能指标,并通过X射线衍射仪分析了石墨化温度不同的碳纸样品的石墨结构,探究了石墨化温度对燃料电池用碳纸性能的影响,确定了实验条件下碳纸性能较优且成本较低的最佳石墨化温度。实验结果表明:在2000~2800℃阶段,2400℃条件下制备的碳纸综合性能最佳,比2800℃制备的碳纸可节省电力能源;石墨化温度为2400℃时,碳纸的拉伸强度为22.9MPa、水平电阻率为3.935mΩ·cm、石墨化度为68.68%。 展开更多
关键词 碳纸 石墨化 聚丙烯腈碳纤维 质子交换膜燃料电池
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纳米纤维素改性酚醛树脂对碳纸电化学性能的影响研究
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作者 闻斌 费郑家豪 +6 位作者 黄依可 郭大亮 李荣年 王虹 沙力争 赵会芳 李静 《中国造纸》 CAS 北大核心 2024年第8期94-99,共6页
本研究探究了以纳米纤维素为酚醛树脂改性剂和成孔剂制备的质子交换膜燃料电池(PEMFCs)用碳纸性能,分析了纳米纤维素添加量对碳纸电阻率、透气性及机械强度等指标的影响,并测试了改性碳纸制备的电池性能。结果表明,与未改性碳纸相比,纳... 本研究探究了以纳米纤维素为酚醛树脂改性剂和成孔剂制备的质子交换膜燃料电池(PEMFCs)用碳纸性能,分析了纳米纤维素添加量对碳纸电阻率、透气性及机械强度等指标的影响,并测试了改性碳纸制备的电池性能。结果表明,与未改性碳纸相比,纳米纤维素添加量为0.20 g的改性碳纸电阻率降低了26.35%,其制备的PEMFCs功率密度峰值提高了81.56%,为325 mW/cm2,纳米纤维素改性酚醛树脂明显实现了碳纸与燃料电池性能的整体提升。 展开更多
关键词 质子交换膜燃料电池 碳纸 纳米纤维素 酚醛树脂
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质子交换膜燃料电池中碳纸微孔层设计的研究进展
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作者 蔡书涵 胡泽鸿 +5 位作者 杨垚磊 闻斌 洪毅 张欣 郭大亮 沙力争 《中国造纸》 CAS 北大核心 2024年第5期84-93,115,共11页
质子交换膜燃料电池(PEMFC)作为一种极具潜力的电化学装置,具有广泛的应用前景,但有效的水管理方法还需探索。不合适的水负荷会引起各种问题,包括材料的降解和反应物传质受限等,损害电池的长期耐用性。在气体扩散层(GDL)中引入微孔层(M... 质子交换膜燃料电池(PEMFC)作为一种极具潜力的电化学装置,具有广泛的应用前景,但有效的水管理方法还需探索。不合适的水负荷会引起各种问题,包括材料的降解和反应物传质受限等,损害电池的长期耐用性。在气体扩散层(GDL)中引入微孔层(MPL)是改善水管理能力和性能的有效方式。本文综述了以碳纸为大孔底物,近年来MPL结构和材料设计方面的研究进展,展望MPL的未来研究方向,对开展提高电池性能的研究具有重要意义。 展开更多
关键词 质子交换膜燃料电池 碳纸 微孔层 改进设计
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双金属Co/Fe-N-C催化剂合成及氧还原性能研究
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作者 张俊 龙涛 +3 位作者 李广环 侯亚庆 许春乾 武云 《功能材料》 CAS CSCD 北大核心 2024年第8期8143-8147,8169,共6页
质子交换膜燃料电池(PEMFC)因其铂基催化剂昂贵和资源稀缺,未能得到大规模应用,过渡金属氮掺杂碳(M-N-C,M=Fe,Ni,Mn,Co)单原子催化剂被认为是有潜力的氧还原反应(ORR)催化剂,其中Fe-N-C催化剂在酸性介质下具有较高的氧还原催化活性,成本... 质子交换膜燃料电池(PEMFC)因其铂基催化剂昂贵和资源稀缺,未能得到大规模应用,过渡金属氮掺杂碳(M-N-C,M=Fe,Ni,Mn,Co)单原子催化剂被认为是有潜力的氧还原反应(ORR)催化剂,其中Fe-N-C催化剂在酸性介质下具有较高的氧还原催化活性,成本低,受到广泛关注,被认为是最具有前途替代铂基催化剂的燃料电池催化剂,然而,大多数报道的Fe-N-C催化剂在燃料电池中的性能仍不如铂基催化剂,并且在酸性介质下稳定性差,而不能被广泛应用,在此,我们报道了一种以ZIF-67为前驱体,在具有稳定高石墨化NC载体上构建Fe-N_(x)和Co-N_(x)双活性位点,得到的Co/Fe-N-C双原子催化剂实现了0.96V(vs.RHE)的起始电位(E_(oneset))和0.79 V(vs.RHE)的半波电位(E_(1/2)),对比Fe-N-C和Co-N-C催化剂有着更显著的稳定性和更优异的ORR活性,为提高Fe-N-C催化活性和耐久性提供一条新思路。 展开更多
关键词 质子交换膜燃料电池 氧还原反应 双金属催化剂 氮掺杂碳 活性位点
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燃料电池催化剂碳载体预处理的研究进展
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作者 张向前 唐迪 +2 位作者 程凤 高凌峰 廖天舒 《船电技术》 2024年第6期117-122,共6页
碳载体的预处理对质子交换膜燃料电池催化剂的活性及耐久性有着至关重要的作用,本文介绍了燃料电池工作过程中碳载体的腐蚀机制,以及碳载体石墨化处理、酸处理、过氧化氢氧化、多元醇氧化等几种常见的预处理方式,指出了不同的预处理方... 碳载体的预处理对质子交换膜燃料电池催化剂的活性及耐久性有着至关重要的作用,本文介绍了燃料电池工作过程中碳载体的腐蚀机制,以及碳载体石墨化处理、酸处理、过氧化氢氧化、多元醇氧化等几种常见的预处理方式,指出了不同的预处理方式对碳载体抗的腐蚀能力、表面官能团性质、比表面积、催化剂活性及负载能力等物理化学性质的影响机制。结果表明,石墨化处理使得碳载体的有序结构增加,能够大大提高其在高电位下的抗腐蚀能力,但同时导致碳载体对催化剂的负载能力有所下降;而酸处理、氧化处理等方式可以有效提高碳载体对催化剂的负载能力,并通过协同效应提高催化剂的活性,缺点是碳载体的抗腐蚀能力稍弱。 展开更多
关键词 质子交换膜燃料电池 催化剂 碳载体 预处理
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The study on carbon nanotubes-supported Pt catalysts for PEMFC
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作者 ZHU Hong KANG Xiao-hong +7 位作者 GE Feng-juan YANG Yu-guo ZHU Jie 朱红 康晓红 葛奉娟 杨玉国 朱捷 《电池》 CAS CSCD 北大核心 2004年第3期224-226,共3页
Carbon nanotube-supported-platinum (Pt/CNTs) and carbon-supported-platinum (Pt/C) catalysts were prepared by in situ chemical reduction method and analyzed by TEM and XRD. Then the experiments were carried out to test... Carbon nanotube-supported-platinum (Pt/CNTs) and carbon-supported-platinum (Pt/C) catalysts were prepared by in situ chemical reduction method and analyzed by TEM and XRD. Then the experiments were carried out to test the performance of PEMFCs with the Pt electrodes. The results showed that in both catalyst, Pt was of small particle size (about 4 nm) and Pt/CNTs exhibited higher catalytic activity than Pt/C. 展开更多
关键词 PT/C PEMFCS 燃料电池 电极 正极 负极
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Fe,N,S-doped porous carbon as oxygen reduction reaction catalyst in acidic medium with high activity and durability synthesized using CaCl_2 as template 被引量:3
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作者 Chi Chen Zhiyou Zhou +4 位作者 Yucheng Wang Xue Zhang Xiaodong Yang Xinsheng Zhang Shigang Sun 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第4期673-682,共10页
Proton exchange membrane fuel cells suffer from the sluggish kinetics of the oxygen reduction reaction(ORR)and the high cost of Pt catalysts.In the present work,a high‐performance ORR catalystbased on Fe,N,S‐doped p... Proton exchange membrane fuel cells suffer from the sluggish kinetics of the oxygen reduction reaction(ORR)and the high cost of Pt catalysts.In the present work,a high‐performance ORR catalystbased on Fe,N,S‐doped porous carbon(FeNS‐PC)was synthesized using melamine formaldehyderesin as C and N precursors,Fe(SCN)3as Fe and S precursors,and CaCl2as a template via a two‐stepheat treatment without a harsh template removal step.The results show that the catalyst treated at900℃(FeNS‐PC‐900)had a high surface area of775m2/g,a high mass activity of10.2A/g in anacidic medium,and excellent durability;the half‐wave potential decreased by only20mV after10000potential cycles.The FeNS‐PC‐900catalyst was used as the cathode in a proton exchangemembrane fuel cell and delivered a peak power density of0.49W/cm2.FeNS‐PC‐900therefore hasgood potential for use in practical applications. 展开更多
关键词 Non‐precious metal catalyst Oxygen reduction reaction proton exchange membrane fuel cell Fe N S‐doped porous carbon Melamine formaldehyde resin
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Conductive and corrosion behaviors of silver-doped carbon-coated stainless steel as PEMFC bipolar plates 被引量:5
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作者 Ming Liu Hong-feng Xu +1 位作者 Jie Fu Ying Tian 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第7期844-849,共6页
Ni–Cr enrichment on stainless steel SS316 L resulting from chemical activation enabled the deposition of carbon by spraying a stable suspension of carbon nanoparticles; trace Ag was deposited in situ to prepare a thi... Ni–Cr enrichment on stainless steel SS316 L resulting from chemical activation enabled the deposition of carbon by spraying a stable suspension of carbon nanoparticles; trace Ag was deposited in situ to prepare a thin continuous Ag-doped carbon film on a porous carbon-coated SS316 L substrate. The corrosion resistance of this film in 0.5 mol·L^(-1) H_2SO_4 solution containing 5 ppm F- at 80°C was investigated using polarization tests. The results showed that the surface treatment of the SS316 L strongly affected the adhesion of the carbon coating to the stainless steel. Compared to the bare SS316 L, the Ag-doped carbon-coated SS316 L bipolar plate was remarkably more stable in both the anode and cathode environments of proton exchange membrane fuel cell(PEMFC) and the interface contact resistance between the specimen and Toray 060 carbon paper was reduced from 333.0 m?·cm^2 to 21.6 m?·cm^2 at a compaction pressure of 1.2 MPa. 展开更多
关键词 proton exchange membrane fuel cells bipolar plates stainless steel silver carbon spraying corrosion
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气体扩散层亲疏水特性对流体分布的预测 被引量:1
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作者 高源 丁兆丰 《同济大学学报(自然科学版)》 EI CAS CSCD 北大核心 2023年第8期1288-1295,共8页
采用伪势两相格子玻尔兹曼方法(LBM)研究了非增湿条件下碳纸和碳布气体扩散层(GDL)的流体流动状态。通过随机方法和X射线扫描法构建了气体扩散层样本。为确保模型中表面张力和接触角计算的准确性,采用玻璃微珠模型进行验证,随后通过调... 采用伪势两相格子玻尔兹曼方法(LBM)研究了非增湿条件下碳纸和碳布气体扩散层(GDL)的流体流动状态。通过随机方法和X射线扫描法构建了气体扩散层样本。为确保模型中表面张力和接触角计算的准确性,采用玻璃微珠模型进行验证,随后通过调整气体扩散层的亲疏水特性,分析流体在气体扩散层中流动的实时状态,得到了亲疏水特性对孔隙结构内水饱和度的影响规律。结果表明:疏水性气体扩散层中的水分布与亲水性气体扩散层中的水分布明显不同,较大的疏水性更有利于气体扩散层内水的排出;疏水性更强的气体扩散层显著提高了液态水进入气体扩散层的入口压力,导致催化剂层(CL)更容易受到水渗透的影响。 展开更多
关键词 质子交换膜燃料电池(PEMFC) 碳纸 碳布 气体扩散层(GDL) 流动传输 疏水性和亲水性
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钛双极板表面碳掺杂氮化钛耐腐蚀涂层制备 被引量:1
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作者 单东方 申桂鑫 +5 位作者 彭善龙 王冬冬 刘月 张衡 刘丽丽 王新东 《稀有金属与硬质合金》 CAS CSCD 北大核心 2023年第1期86-91,共6页
为改善钛双极板在质子交换膜(PEM)水电解槽环境中的耐腐蚀性能和导电性能,采用电泳沉积-热处理两步法在钛基底表面制备碳掺杂氮化钛(C-TiN)复合保护涂层,并在0.5 mol/L的H_(2)SO_(4)和5 mg/L的F-溶液中模拟PEM水电解槽阳极环境测试其电... 为改善钛双极板在质子交换膜(PEM)水电解槽环境中的耐腐蚀性能和导电性能,采用电泳沉积-热处理两步法在钛基底表面制备碳掺杂氮化钛(C-TiN)复合保护涂层,并在0.5 mol/L的H_(2)SO_(4)和5 mg/L的F-溶液中模拟PEM水电解槽阳极环境测试其电化学腐蚀性。结果表明,电泳沉积及热处理改善了氮化钛纳米颗粒的连通性,增强了涂层与衬底的粘附力,实现了电子在电活性材料中快速传递。400℃下制备的碳掺杂氮化钛涂层(C-TiN-400℃),其导电性与耐蚀性均得到明显提升;相比于未处理的样品,镀有C-TiN-400℃涂层的样品在146.3 N/cm^(2)压力下的接触电阻可达到2.25 mΩ·cm^(2)。 展开更多
关键词 质子交换膜 碳掺杂氧化钛 电泳沉积 热处理 钛双极板 界面接触电阻
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磺化聚砜/黑磷复合质子交换膜制备及性能研究
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作者 何泊远 雷鹤翔 +6 位作者 曹宁 陈曦 姚丽菲 贾伟艺 连慧琴 汪晓东 崔秀国 《中国塑料》 CAS CSCD 北大核心 2023年第11期15-23,共9页
以聚醚砜(PES)为原料,采用氯磺酸(CSA)为磺化剂,通过控制反应温度和时间制备系列磺化聚砜(SPES),并以SPES为基质,二维黑磷(BP)为功能填料,采用溶液铸膜法制备了复合质子交换膜。采用红外光谱分析仪(FTIR)、X射线衍射仪(XRD)、扫描电子... 以聚醚砜(PES)为原料,采用氯磺酸(CSA)为磺化剂,通过控制反应温度和时间制备系列磺化聚砜(SPES),并以SPES为基质,二维黑磷(BP)为功能填料,采用溶液铸膜法制备了复合质子交换膜。采用红外光谱分析仪(FTIR)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)等对材料结构进行表征,研究了复合膜的吸水率、质子交换性、阻醇性等。结果表明,SPES的磺化度随反应温度、时间、磺化剂浓度的升高而增大。BP的添加增强了复合膜的热稳定性、氧化稳定性、质子交换性、阻醇性等综合性能。在相同测试条件下SPES基膜的甲醇渗透率为1.185×10^(-6)cm^(2)/s,而5%(质量分数,下同)SPES/BP复合膜的甲醇渗透率仅为2.88×10^(-7)cm^(2)/s。 展开更多
关键词 磺化聚砜 质子交换膜燃料电池 黑磷 甲醇渗透率
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海上风电制氢技术现状与发展趋势 被引量:10
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作者 纪钦洪 于广欣 +3 位作者 黄海龙 熊亮 张一平 李元芳 《中国海上油气》 CAS CSCD 北大核心 2023年第1期179-186,共8页
氢能应用广泛,具有能源与脱碳“双载体”属性,被认为能源转型、工业及交通领域深度脱碳的关键路径。海上风电制氢靠近氢气消费中心,是支撑海上风电走向深远海的重要技术,也是重要的绿氢来源。本文围绕海上风电制氢各环节的技术、方式、... 氢能应用广泛,具有能源与脱碳“双载体”属性,被认为能源转型、工业及交通领域深度脱碳的关键路径。海上风电制氢靠近氢气消费中心,是支撑海上风电走向深远海的重要技术,也是重要的绿氢来源。本文围绕海上风电制氢各环节的技术、方式、产品方案以及成本,对比了碱性、质子交换膜、固体氧化物和固体聚合物阴离子交换膜4种电解水制氢技术,认为质子交换膜电解水技术更适合海上风电制氢;对比分析了海上风电制氢模式,认为海上风电并网陆上制氢是主流的电解槽布置方式,而离网海上中心平台制氢具有较大发展潜力;天然气管道掺氢是更具可行性的海上氢气储运方式但也存在挑战;电耗和电解槽投资是海上风电制氢的主要成本构成,预测海上风电发电成本、电解槽制造成本以及碳价格将共同推动海上风电制氢成本的逐步下降。本文研究成果可为海上风电制氢技术开发与示范应用提供思路和参考。 展开更多
关键词 海上风电 氢能 质子交换膜 电解槽 成本 碳价格
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金属双极板表面改性碳基涂层研究进展
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作者 赵蒙 周晖 +1 位作者 贵宾华 汪科良 《表面技术》 EI CAS CSCD 北大核心 2023年第11期182-199,共18页
首先对比了贵金属涂层、氮化物涂层、碳基涂层的性能优劣,重点阐述了碳基涂层改性技术的最新研究进展。然后,以碳基涂层的设计及制备2个维度为研究切入点进行阐述。在膜系设计方面,着重分析了膜系设计和元素掺杂对碳基涂层的性能影响;... 首先对比了贵金属涂层、氮化物涂层、碳基涂层的性能优劣,重点阐述了碳基涂层改性技术的最新研究进展。然后,以碳基涂层的设计及制备2个维度为研究切入点进行阐述。在膜系设计方面,着重分析了膜系设计和元素掺杂对碳基涂层的性能影响;在制备方面,分析了偏压、沉积时间和气体流量等对碳基涂层的化学组分、微观结构的调控作用。最后,总结了当前碳基涂层改性双极板存在的问题,主要为涂层运行寿命不足,无法达到服役标准;测试条件不统一,且模拟环境与电堆实际工况差距较大;涂层长时间服役后的失效机制不明确。同时,对金属双极板改性碳基涂层的进一步发展方向做出了展望。 展开更多
关键词 质子交换膜电池 双极板 碳基涂层 PVD 耐腐蚀性能 导电性能
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