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Borohydride Ammoniate Solid Electrolyte Design for All-Solid-State Mg Batteries 被引量:1
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作者 Yuepeng Pang Zhengfang Nie +5 位作者 Fen Xu Lixian Sun Junhe Yang Dalin Sun Fang Fang Shiyou Zheng 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第1期100-106,共7页
Searching for novel solid electrolytes is of great importance and challenge for all-solid-state Mg batteries.In this work,we develop an amorphous Mg borohydride ammoniate,Mg(BH_(4))_(2)·2NH_(3),as a solid Mg elec... Searching for novel solid electrolytes is of great importance and challenge for all-solid-state Mg batteries.In this work,we develop an amorphous Mg borohydride ammoniate,Mg(BH_(4))_(2)·2NH_(3),as a solid Mg electrolyte that prepared by a NH_(3)redistribution between 3D framework-γ-Mg(BH_(4))_(2)and Mg(BH_(4))_(2)·6NH_(3).Amorphous Mg(BH_(4))_(2)·2NH_(3)exhibits a high Mg-ion conductivity of 5×10^(-4)S cm^(-1)at 75℃,which is attributed to the fast migration of abundant Mg vacancies according to the theoretical calculations.Moreover,amorphous Mg(BH_(4))_(2)·2NH_(3)shows an apparent electrochemical stability window of 0-1.4 V with the help of in-situ formed interphases,which can prevent further side reactions without hindering the Mg-ion transfer.Based on the above superiorities,amorphous Mg(BH_(4))_(2)·2NH_(3)enables the stable cycling of all-solid-state Mg cells,as the critical current density reaches 3.2 mA cm^(-2)for Mg symmetrical cells and the reversible specific capacity reaches 141 mAh g^(-1)with a coulombic efficiency of 91.7%(first cycle)for Mg||TiS_(2)cells. 展开更多
关键词 all-solid-state Mg batteries amorphization Mg borohydride ammoniate Mg vacancy migration solid electrolyte
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Synthesis of amorphous manganese borohydride in the(NaBH_4–MnCl_2) system, its hydrogen generation properties and crystalline transformation during solvent extraction 被引量:1
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作者 Robert A.Varin Deepak K.Mattar +1 位作者 Amirreza Shirani Bidabadi Marek Polanski 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2017年第1期24-34,共11页
The mixture of(2NaBH4+ MnCl2) was ball milled in a magneto-mill. No gas release was detected. The XRD patterns of the ball milled mixture exhibit only the Bragg diffraction peaks of the Na Cl-type salt which on the ba... The mixture of(2NaBH4+ MnCl2) was ball milled in a magneto-mill. No gas release was detected. The XRD patterns of the ball milled mixture exhibit only the Bragg diffraction peaks of the Na Cl-type salt which on the basis of the present X-ray diffraction results and the literature is likely to be a solid solution Na(Cl)x(BH4)(1-x), possessing a cubic Na Cl-type crystalline structure. No presence of any crystalline hydride was detected by powder X-ray diffraction which clearly shows that NaBH4in the initial mixture must have reacted with MnCl2forming a Na Cl-type by-product and another hydride that does not exhibit X-ray Bragg diffraction peaks. Mass spectrometry(MS) of gas released from the ball milled mixture during combined MS/thermogravimetric analysis(TGA)/differential scanning calorimetry(DSC) experiments, confirms mainly hydrogen(H2) with a small quantity of diborane gas, B2H6. The Fourier transform infra-red(FT-IR) spectrum of the ball milled(2NaBH4+ MnCl2) is quite similar to the FT-IR spectrum of crystalline manganese borohydride, c-Mn(BH4)2, synthesized by ball milling, which strongly suggests that the amorphous hydride mechano-chemically synthesized during ball milling could be an amorphous manganese borohydride. Remarkably, the process of solvent filtration and extraction at 42 °C, resulted in the transformation of mechano-chemically synthesized amorphous manganese borohydride to a nanostructured,crystalline, c-Mn(BH4)2hydride. 展开更多
关键词 Ball milling Mechano-chemical activation synthesis Amorphous manganese borohydride Mn(BH4)2 Dehydrogenation behavior Solvent extraction Crystallization of manganese borohydride Mn(BH4)2
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A Facile Route to Phosphanylborohydrides:Synthesis, Crystal Structure and Spectroscopic Properties of 1,2-Bis(Diphenylphosphinoborane)Ethane
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作者 Leyla Tatar Yildirim Mehdi Masjedi Saim Ozkar 《Journal of Crystallization Process and Technology》 2011年第1期1-7,共7页
A novel and simple synthetic way using NaBH4 in the mixure of H2O-THF was applied to prepare 1,2-bis(diphenylphosphinoborane)ethane, dppe(BH3)2, in high yield and purity. The phosphanylborohydride compound dppe(BH3)2 ... A novel and simple synthetic way using NaBH4 in the mixure of H2O-THF was applied to prepare 1,2-bis(diphenylphosphinoborane)ethane, dppe(BH3)2, in high yield and purity. The phosphanylborohydride compound dppe(BH3)2 was isolated in the form of colorless crystals and characterized by single crystal X-ray diffraction, 1H, 13C, 31P and 11B NMR spectroscopy. Prismatic colorless crystals of dppe(BH3)2 were obtained in monoclinic crystal system and space group P21 with two asymmetric units in the unit cell. Lattice parameters were: a = 11.657(2), b = 17.237(2), c = 12.764(2) ?, β = 98.735(14)°, 2535.0(7) ? 展开更多
关键词 Crystal Structure SYNTHESIS Phosphinoborane Sodium borohydride Phosphanylborohydride X-Ray Diffraction
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Preparation of copper nanoparticles by chemical reduction method using potassium borohydride 被引量:7
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作者 张秋利 杨志懋 +2 位作者 丁秉钧 兰新哲 郭莹娟 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第S1期240-244,共5页
High dispersive copper nanoparticles were prepared by chemical reduction method using potassium borohydride as reducing agent.The effects of reactant ratio,concentration of CuSO4,reaction temperature,and dispersant on... High dispersive copper nanoparticles were prepared by chemical reduction method using potassium borohydride as reducing agent.The effects of reactant ratio,concentration of CuSO4,reaction temperature,and dispersant on the size of product and conversion rate were studied.The morphologies of copper nanoparticles were characterized by scanning electron microscopy.The results show that the optimum process conditions are as follows:the molar ratio of KBH4 to CuSO4 is 0.75(3:4),concentration of CuSO4 is 0.4 mol/L,reaction temperature is 30℃,and dispersant is n-butyl alcohol.The average particles size of copper powders with spherical shape gained is about 100 nm. 展开更多
关键词 COPPER NANOPARTICLES potassium borohydride chemical reduction
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Study of borohydride ionic liquids as hydrogen storage materials 被引量:3
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作者 Loris Lombardo Heena Yang Andreas Züttel 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第6期17-21,共5页
Stability of borohydrides is determined by the localization of the negative charge on the boron atom.Ionic liquids(ILs) allow to modify the stability of the borohydrides and promote new dehydrogenation pathways with a... Stability of borohydrides is determined by the localization of the negative charge on the boron atom.Ionic liquids(ILs) allow to modify the stability of the borohydrides and promote new dehydrogenation pathways with a lower activation energy. The combination of borohydride and IL is very easy to realize and no expensive rare earth metals are required. The composite of the ILs with complex hydrides decreases the enthalpy and activation energy for the hydrogen desorption. The Coulomb interaction between borohydride and IL leads to a destabilization of the materials with a significantly lower enthalpy for hydrogen desorption. Here, we report a simple ion exchange reaction using various ILs, such as vinylbenzyltrimethylammonium chloride([VBTMA][Cl]), 1-butyl-3-methylimidazolium chloride([bmim][Cl]), and 1-ethyl-1-methylpyrrolidinium bromide([EMPY][Br]) with NaBH4 to decrease the hydrogen desorption temperature. Dehydrogenation of 1-butyl-3-methylimidazolium borohydride([bmim][BH4]) starts below 100℃. The quantity of desorbed hydrogen ranges between 2.4 wt% and 2.9 wt%, which is close to the theoretical content of hydrogen. The improvement in dehydrogenation is due to the strong amine cation that destabilizes borohydride by charge transfer. 展开更多
关键词 HYDROGEN storage IONIC liquid SODIUM borohydride THERMOLYSIS
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Hydrogen generation from methanolysis of sodium borohydride over Co/Al_2O_3 catalyst 被引量:4
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作者 Dongyan Xu Lin Zhao +1 位作者 Ping Dai Shengfu Ji 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2012年第5期488-494,共7页
Co/Al2O3 catalyst is prepared with an impregnation-chemical reduction method and used to catalyze the methanolysis of sodium borohydride (NaBH 4) for hydrogen generation.At solution temperature of 0 C,the methanolys... Co/Al2O3 catalyst is prepared with an impregnation-chemical reduction method and used to catalyze the methanolysis of sodium borohydride (NaBH 4) for hydrogen generation.At solution temperature of 0 C,the methanolysis reaction can be effectively accelerated using Co/Al2O3 catalyst and provide a desirable hydrogen generation rate,which makes it suitable for applications under the circumstance of low environmental temperature.The byproduct of methanolysis reaction is analyzed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR).The characterization results indicate that methanol can be easily recovered after methanolysis reaction by hydrolysis of the methanolysis byproduct,NaB(OCH 3) 4.The catalytic activity of Co/Al2O3 towards NaBH 4 methanolysis can be further improved by appropriate calcination treatment.The catalytic methanolysis kinetics and catalyst reusability are also studied over the Co/Al2O3 catalyst calcined at the optimized temperature. 展开更多
关键词 hydrogen generation sodium borohydride METHANOLYSIS COBALT
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Catalytic Hydrolysis of Borohydride for Fuel Cells 被引量:3
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作者 WANG Lianbang ZHAN Xingyue YANG Zhenzhen MA Chun'an 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第4期693-697,共5页
Borohydrides present interesting options for the electrochemical power generation acting either as hydrogen source or anodic fuel for direct borohydride fuel cells(DBFC).In this work,Mg-Ni composite synthesized by mec... Borohydrides present interesting options for the electrochemical power generation acting either as hydrogen source or anodic fuel for direct borohydride fuel cells(DBFC).In this work,Mg-Ni composite synthesized by mechanically alloying method,used as the catalyst for the hydrolysis of borohydride,has been investigated.Co-doping treatment has been carried out for the purpose of improving the hydrolysis rate further.The as-prepared and Co-doped Mg-Ni composites with low cost showed high catalytic activity to the hydrolysis of borohydride for hydrogen generation.After Co-doping,the hydrogen generation rate was around 280 ml·g-1·min-1.Borohydride would be a promising hydrogen source for fuel cells. 展开更多
关键词 borohydride catalytic hydrolysis Mg-Ni composite fuel cell
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Zinc Borohydride-Ionic Liquid: Stable and Efficient System for Reductive Reaction of Aldehydes with Primary Amines to Corresponding Secondary Amines 被引量:3
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作者 NIAN Bao-yi XU Gang +1 位作者 WU Jiang-ping YANG Li-rong 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2008年第1期120-122,共3页
Ionic liquids(ILs) are attracting much attention in various fields of chemical synthesis, electrochemical applications, liquid-liquid extractions, as well as biotransformations. Among those fields, the application o... Ionic liquids(ILs) are attracting much attention in various fields of chemical synthesis, electrochemical applications, liquid-liquid extractions, as well as biotransformations. Among those fields, the application of ILs as the potential green solvent for a wide variety of synthetic processes is an area of intense researches. High yield, high selectivity, and good catalytic charac-teristics have usually been achieved. After the isolation of products, ILs can usually be recovered and recycled many times by simple treating procedures, such as, filtration, extraction, and dryness. 展开更多
关键词 Ionic liquid Zinc borohydride Reductive arnination BMImBF4
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Methanol oxidation in acidic and alkaline electrolytes using PtRuIn/C electrocatalysts prepared by borohydride reduction process 被引量:1
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作者 Santos M.C.L. Nandenha J. +2 位作者 Ayoub J.M.S. Assumpao M.H.M.T. Neto A.O. 《燃料化学学报》 EI CAS CSCD 北大核心 2018年第12期1462-1471,共10页
PtRuIn/C electrocatalysts( 20% metal loading by weight) were prepared by sodium borohydride reduction process using H_2PtCl6·6H_2O,RuCl_3·xH_2O and InCl_3·xH_2O as metal sources,borohydride as reducing ... PtRuIn/C electrocatalysts( 20% metal loading by weight) were prepared by sodium borohydride reduction process using H_2PtCl6·6H_2O,RuCl_3·xH_2O and InCl_3·xH_2O as metal sources,borohydride as reducing agent and Carbon Vulcan XC72 as support. The synthetized PtRuIn/C electrocatalysts were characterized by X-ray diffraction( XRD),energy dispersive analysis( EDX),transmission electron microscopy( TEM),cyclic voltammetry( CV),chronoamperommetry( CA) and polarization curves in alkaline and acidic electrolytes( single cell experiments). The XRD patterns showPtpeaks are attributed to the face-centered cubic( fcc) structure,and a shift of Pt( fcc) peaks indicates that Ru or In is incorporated into Ptlattice. TEMmicrographs showmetal nanoparticles with an average nanoparticle size between 2.7 and 3.5 nm. Methanol oxidation in acidic and alkaline electrolytes was investigated at room temperature,by CV and CA. PtRu/C( 50 ∶ 50) shows the highest activity among all electrocatalysts in study considering methanol oxidation for acidic and alkaline electrolyte. Polarization curves at 80 ℃ showPtRuIn/C( 50 ∶ 25 ∶ 25)with superior performance for methanol oxidation,when compared to Pt/C,PtIn/C and PtRu/C for both electrolytes. The best performance obtained by PtRuIn/C( 50 ∶ 25 ∶ 25) in real conditions could be associated with the increased kinetics reaction and/or with the occurrence simultaneously of the bifunctional mechanism and electronic effect resulting from the presence of Ptalloy. 展开更多
关键词 borohydride reduction process PtRuIn/C ELECTROCATALYSTS METHANOL oxidation ACIDIC and ALKALINE electrolytes polarization CURVES
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Direct oxidation of methane at low temperature using Pt/C,Pd/C,Pt/C-ATO and Pd/C-ATO electrocatalysts prepared by sodium borohydride reduction process 被引量:1
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作者 J.Nandenha E.H.Fontes +2 位作者 R.M.Piasentin F.C.Fonseca A.O.Neto 《燃料化学学报》 EI CAS CSCD 北大核心 2018年第9期1137-1145,共9页
The main objective of this paper was to characterize the voltammetric profiles of the Pt/C,Pt/C-ATO,Pd/C and Pd/CATO electrocatalysts and study their catalytic activities for methane oxidation in an acidic electrolyte... The main objective of this paper was to characterize the voltammetric profiles of the Pt/C,Pt/C-ATO,Pd/C and Pd/CATO electrocatalysts and study their catalytic activities for methane oxidation in an acidic electrolyte at 25 ℃ and in a direct methane proton exchange membrane fuel cell at 80 ℃. The electrocatalysts prepared also were characterized by X-ray diffraction( XRD) and transmission electron microscopy( TEM). The diffractograms of the Pt/C and Pt/C-ATO electrocatalysts show four peaks associated with Pt face-centered cubic( fcc) structure,and the diffractograms of Pd/C and Pd/C-ATO show four peaks associated with Pd face-centered cubic( fcc) structure. For Pt/C-ATO and Pd/C-ATO,characteristic peaks of cassiterite( SnO_2) phase are observed,which are associated with Sb-doped SnO_2( ATO) used as supports for electrocatalysts. Cyclic voltammograms( CV) of all electrocatalysts after adsorption of methane show that there is a current increase during the anodic scan. However,this effect is more pronounced for Pt/C-ATO and Pd/C-ATO. This process is related to the oxidation of the adsorbed species through the bifunctional mechanism,where ATO provides oxygenated species for the oxidation of CO or HCO intermediates adsorbed in Pt or Pd sites. From in situ ATR-FTIR( Attenuated Total Reflectance-Fourier Transform Infrared) experiments for all electrocatalysts prepared the formation of HCO or CO intermediates are observed,which indicates the production of carbon dioxide. Polarization curves at 80 ℃in a direct methane fuel cell( DMEFC) show that Pd/C and Pt/C electroacatalysts have superior performance to Pd/C-ATO and Pt/C-ATO in methane oxidation. 展开更多
关键词 sodium borohydride reduction process Pt/C-ATO and Pd/C-ATO ELECTROCATALYSTS METHANE oxidation acidic electrolytes polarization curves
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AB_5-type Hydrogen Storage Alloy Modified with Ti/Zr Used as Anodic Materials in Borohydride Fuel Cell 被引量:1
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作者 Lianbang WANG Chunan MA +2 位作者 Xinbiao MAO Yuanming SUN Seijiro SUDA 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第6期831-835,共5页
Fuel cell using borohydride as the fuel has received much attention. AB5-type hydrogen storage alloy used as the anodic material instead of noble metals has been investigated. In order to restrain the generation of hy... Fuel cell using borohydride as the fuel has received much attention. AB5-type hydrogen storage alloy used as the anodic material instead of noble metals has been investigated. In order to restrain the generation of hydrogen and enhance the utilization of borohydride, Ti/Zr metal powders has been added into the parent LmNi4.78Mn0.22 (where Lm is La-richened mischmetal) alloy (LNM) by ball milling and heat treatment methods. It is found that the addition of Ti/Zr metal powders lowers the electrochemical catalytic activity of the electrodes, at the same time, restrains the generation of hydrogen and enhances the utilization of the fuel. All the results show that the hydrogen generation rate or the utilization of the fuel is directly relative to the electrochemical catalytic activity or the discharge capability of the electrodes. The utilization of the fuel increases with discharge current density. It is very important to find a balance between the discharge capability and the utilization of the fuel. 展开更多
关键词 Fuel cell borohydride AB5-type hydrogen storage alloy Ball-milling method Heat treatment method
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Reductive amination of aldehydes and ketones using sodium borohydride in the presence of silica chloride under solvent-free conditions 被引量:1
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作者 Heshmatollah Alinezhad Mahmood Tajbakhsh Neda Hamidi 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第1期47-50,共4页
A simple and convenient procedure for the preparation of amines from aldehydes and ketones with sodium borohydride activated by silica chloride as a catalyst under solvent-free conditions is described.A variety of ali... A simple and convenient procedure for the preparation of amines from aldehydes and ketones with sodium borohydride activated by silica chloride as a catalyst under solvent-free conditions is described.A variety of aliphatic and aromatic aldehydes,ketones and amines when mixed with NaBH;/silica chloride at room temperature,afforded excellent yield of the corresponding amines. 展开更多
关键词 Reductive amination Silica chloride Solvent-free conditions Sodium borohydride
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Oxalic Acid Promoted Hydrolysis of Sodium Borohydride for Transition Metal Free Hydrogen Generation 被引量:1
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作者 PENG Yuanting ZENG Hui +5 位作者 SHI Yu XU Jinrong XIE Lei CHEN Jun ZHENG Jie LI Xingguo 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第6期1011-1015,共5页
We reported an inexpensive and high-efficiency hydrogen generation method from NaBH4 hydrolysis promoted by oxalic acid.NaBH4 and H2C2O4 were premixed and hydrogen generation was initiated by adding water into the sol... We reported an inexpensive and high-efficiency hydrogen generation method from NaBH4 hydrolysis promoted by oxalic acid.NaBH4 and H2C2O4 were premixed and hydrogen generation was initiated by adding water into the solid mixture.H2C2O4 was selected as the acid promotor due to its solid state and low mass per proton.The effect of reactant ratio on the hydrogen yield and hydrogen storage density was investigated.With optimized reactant ratio,high gravimetric hydrogen storage up to 4.4wt%based on all the reactants can be achieved with excellent hydrogen generation kinetics. 展开更多
关键词 hydrogen generation sodium borohydride oxalic acid HYDROLYSIS
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High volumetric hydrogen density phases of magnesium borohydride at high-pressure:A first-principles study 被引量:1
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作者 范靖 包括 +3 位作者 段德芳 汪连城 刘冰冰 崔田 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第8期351-359,共9页
The previously proposed theoretical and experimental structures, bond characterization, and compressibility of Mg(BH4)2 in a pressure range from 0 to 10 GPa are studied by ab initio density-functional calculations. ... The previously proposed theoretical and experimental structures, bond characterization, and compressibility of Mg(BH4)2 in a pressure range from 0 to 10 GPa are studied by ab initio density-functional calculations. It is found that the ambient pressure phases of meta-stable I41/amd and unstable P-3ml proposed recently are extra stable and cannot decompose under high pressure. Enthalpy calculation indicates that the ground state of F222 structure proposed by Zhou et al. [2009 Phys. Rev. B 79 212102] will transfer to I41/amd at 0.7 GPa, and then to a P-3ml structure at 6.3 GPa. The experimental P6122 structure (a-phase) transfers to I41/amd at 1.2 GPa. Furthermore, both I41/arnd and P-3ml can exist as high volumetric hydrogen density phases at low pressure. Their theoretical volumetric hydrogen densities reach 146.351 g H2/L and 134.028 g H2/L at ambient pressure, respectively. The calculated phonon dispersion curve shows that the I41/amd phase is dynamically stable in a pressure range from 0 to 4 CPa and the P-3ral phase is stable at pressures higher than 1 GPa. So the I41/arnd phase may be synthesized under high pressure and retained to ambient pressure. Energy band structures show that they are both always ionic crystalline and insulating with a band-gap of about 5 eV in this pressure range. In addition, they each have an anisotropic compressibility. The c axis of these structures is easy to compress. Especially, the c axis and volume of P-3ml phase are extraordinarily compressible, showing that compression along the e axis can increase the volumetric hydrogen content for both I41/amd and P-3ml structures. 展开更多
关键词 hydrogen storage material metal borohydride thermodynamic stability dynamical stability
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A Pt/MnV_(2)O_(6) nanocomposite for the borohydride oxidation reaction
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作者 Jadranka Milikic Marta Martins +7 位作者 Ana S.Dobrota Gamze Bozkurt Gulin S.P.Soylu Ayse B.Yurtcan Natalia V.Skorodumova Igor A.Pasti Biljana Sljukic Diogo M.F.Santos 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第4期428-436,共9页
Problems associated with carbon support corrosion under operating fuel cell conditions require the identification of alternative supports for platinum-based nanosized electrocatalysts.Platinum supported on manganese v... Problems associated with carbon support corrosion under operating fuel cell conditions require the identification of alternative supports for platinum-based nanosized electrocatalysts.Platinum supported on manganese vanadate(Pt/MnV_(2)O_(6))was prepared by microwave irradiation method and characterized using X-ray diffraction,Fourier-transform infrared spectroscopy,X-ray photoelectron spectroscopy,scanning electron microscopy with energy dispersive spectroscopy,and transmission electron microscopy.The borohydride oxidation reaction(BOR)on Pt/MnV_(2)O_(6) was studied in highly alkaline media using voltammetry,chronoamperometry,and electrochemical impedance spectroscopy.BOR electrocatalytic activity of Pt/MnV_(2)O_(6) was also compared with that of commercial Pt/C(46 wt%Pt)electrocatalyst.The apparent activation energy of BOR at Pt/MnV_(2)O_(6) was estimated to be 32 k J mol^(-1) and the order of reaction to be 0.51,indicating that borohydride hydrolysis proceeds in parallel with its oxidation.Long-term stability of Pt/MnV_(2)O_(6) under BOR typical conditions was observed.A laboratory-scale direct borohydride fuel cell assembled with a Pt/MnV_(2)O_(6) anode reached a specific power of 274 W g^(-1).Experimental results on Pt/MnV_(2)O_(6) were complemented by DFT calculations,which indicated good adherence of Pt to MnV_(2)O_(6),beneficial for electrocatalyst stability. 展开更多
关键词 borohydride oxidation reaction Platinum-based electrocatalyst Manganese vanadate Density functional theory
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Oxalic Acid Promoted Hydrolysis of Sodium Borohydride for Transition Metal Free Hydrogen Generation
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作者 PENG Yuanting ZENG Hui +5 位作者 SHI Yu XU Jinrong XIE Lei CHEN Jun ZHENG Jie LI Xingguo 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第4期706-710,共5页
We reported a low cost,high efficiency hydrogen generation method from NaBH4 hydrolysis promoted by oxalic acid.NaBH4 and H2C2O4 were premixed and hydrogen generation was initiated by adding water into the solid mixtu... We reported a low cost,high efficiency hydrogen generation method from NaBH4 hydrolysis promoted by oxalic acid.NaBH4 and H2C2O4 were premixed and hydrogen generation was initiated by adding water into the solid mixture.H2C2O4 was selected as the acid promotor due to its solid state and low mass per proton.The effect of reactant ratio on the hydrogen yield and hydrogen storage density was investigated.With optimized reactant ratio,high gravimetric hydrogen storage up to 4.4wt% based on all the reactants can be achieved with excellent hydrogen generation kinetics. 展开更多
关键词 hydrogen generation sodium borohydride oxalic acid HYDROLYSIS
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The Unexpected Reductive Products of δ-Alkoxyenal by Sodium Borohydride in Methanol with A Trace of Magnesium Methoxide
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作者 YuXIA XiangShuXIAO 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第9期809-810,共2页
Reduction of d-alkoxy enal 1 and 4 by sodium borohydride in methanol with a catalytic amount of magnesium methoxide gave unexpected methoxylated poducts 3 and 6 respectively.
关键词 Sodium borohydride Magnesium methoxide Michael addition.
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Waste Water Treatment in Direct Borohydride Fuel Cell with Bipolar Membrane
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作者 Paata Nikoleishvili Gigla Tsurtsumia +5 位作者 Valentina Kveselava Giorgi Gorelishvili Rusudan Kurtanidze Nana Koiava Izolda Kakhniashvili Davit Sharabidze 《Open Journal of Ecology》 2015年第2期22-32,共11页
It was established that application of bipolar membrane in a direct borohydride fuel cell (DBFC) with H2O2 co-generation enabled to keep constant pH in catholyte within 2.5 - 3.2 limits, which allowed us to carry out ... It was established that application of bipolar membrane in a direct borohydride fuel cell (DBFC) with H2O2 co-generation enabled to keep constant pH in catholyte within 2.5 - 3.2 limits, which allowed us to carry out treatment of water polluted by organic compounds in fuel cell catholyte. Treatment of water was carried out by electro-Fenton and photo-electro-Fenton methods. With the view of efficiency, photo-electro-Fenton method of treatment was the most efficient, which enabled to decrease COD of catholytes containing (in each case) phenol, valsaren, 400 g/L dymethoate (BI-58) and valsaciper from 500 ppm to 30, 11, 9 and 3 ppm, respectively after 180 min treatment. By increasing the catholyte temperature from 20℃?to 40℃?in the same period, phenol COD fell to 5 ppm. 展开更多
关键词 Direct borohydride FUEL Cell BIPOLAR MEMBRANE Hydrogen PEROXIDE ELECTRO-FENTON Photo-Electro-Fenton Water Treatment
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Chitosan-supported Borohydride Reducing Agent
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作者 Qin, CQ Xiao, L Du, YM 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第12期1051-1052,共2页
A new chitosan-supported borohydride reducing reagent (CBER) was prepared by treatment of KBH4 with the resin of chitosan derivative, which was first synthesized from: the reaction of cross-linked chitosan microsphere... A new chitosan-supported borohydride reducing reagent (CBER) was prepared by treatment of KBH4 with the resin of chitosan derivative, which was first synthesized from: the reaction of cross-linked chitosan microsphere with glycidyl trimethylammonium chloride. CBER could reduce aromatic carbonyl compound to corresponding alcohol. 展开更多
关键词 polymer-support borohydride reducing agent chitosan resin
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THE TRANSITION METAL COMPOUNDS CATALYZED BOROHYDRIDE EXCHANGE RESIN TO REDUCE THE AROMATIC NITRO COMPOUNDS
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作者 Jia Wei CHEN Cai Qin QIN Zhanghuang XU Jilong JIANG (Department of Chemistry,Hubei University,Wuhan,430062) 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第2期127-130,共4页
Aromatic nitro compounds are reduced to correspouding amiues in ethanol by borohydride exchauge resin(BER)in the presence of transition metal Pd,Co,Ni,Cu)compounds as catalysts.
关键词 borohydride exchange resin(BER) polymeric reducing agent
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