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Cotton stalk activated carbon-supported Co-Ce-B nanoparticles as efficient catalysts for hydrogen generation through hydrolysis of Sodium borohydride

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Carbon Resources Conversion 2019年第3期2卷 225-232页

作者： Xiuli Zhang Chunhu Li Jianlin Qub Qingjie Guo Kelei Huang Key Laboratory of Marine Chemistry Theory and Engineering Technology of Ministry of Education College of Chemistry and Chemical EngineeringOcean University of ChinaQingdao 266100ShandongChina Key Laboratory of Clean Chemical Processing of Shandong Province College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina

Porous cotton stalk activated carbons(CSAC)were prepared by phosphoric acid activation of cotton stalks in a fluidized bed.The CSAC-supported Co-B and Co-Ce-B catalysts were prepared by the impregnation-chemical reduction method.The samples were characterized by the nitrogen adsorption,XRD,FTIR and TEM measurements.The effects of the Sodium borohydride(NaBH_(4))and sodium hydroxide(NaOH)concentrations,reaction temperature and recyclability on the rate of NaBH_(4)hydrolysis over the CSAC-supported Co-Ce-B catalysts were systematically investigated.The results showed that the agglomeration of the Co-Ce-B nanoclusters on the CSAC support surface was significantly reduced with the introduction of cerium.The CSAC-supported Co-Ce-B catalyst exhibited superior catalytic activity and the average hydrogen generation rate was 16.42 L min^(−1)g^(−1)Co at 25℃,which is higher than the most reported cobalt-based catalysts.The catalytic hydrolysis of NaBH_(4)was zero order with respect to the NaBH_(4)concentration,and the hydrogen generation rate decreased with the increase in the NaOH concentration.The activation energy of the hydrogen generation reaction on the prepared catalyst was estimated to be 48.22 kJ mol^(−1).A kinetic rate equation was also proposed.

关键词： Sodium borohydride Hydrogen Activated carbon Co-Ce-B catalyst Catalytic activity Kinetics

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Oxalic Acid Promoted Hydrolysis of Sodium borohydride for Transition Metal Free Hydrogen Generation

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Journal of Wuhan University of Technology(Materials Science) 2020年第4期35卷 1011-1015页

作者： PENG Yuanting ZENG Hui SHI Yu XU Jinrong 谢镭陈均 ZHENG Jie LI Xingguo Wuhan Institute of Marine Electric Propulsion Wuhan 430064China Sunan Institute for Molecular Engineering Peking UniversityChangshu Hi-Tech Industrial Development ZoneChangshu 215500China Institute of Materials China Academy of Engineering PhysicsJiangyou 621908China Beijing National Laboratory for Molecular Sciences(BNLMS) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

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.

关键词： hydrogen generation Sodium borohydride oxalic acid hydrolysis

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Ultrafast room-temperature reduction of graphene oxide by Sodium borohydride,sodium molybdate and hydrochloric acid

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Chinese Chemical Letters 2021年第1期32卷 543-547页

作者： Jun Hu Gang Kong Yanbin Zhu Chunshan Che School of Materials Science and Engineering South China University of TechnologyGuangzhou 510641China

Since graphene-based materials have shown great potential in many fields,it is important to explore ultrafast and high-efficient methods to synthesize reduced graphene oxide(rGO) using inexpensive reducing agents under mild conditions.Here,we reported a novel method for the ultrafast chemical reduction of graphene oxide(GO) at room temperature using Sodium borohydride(NaBH_(4)),sodium molybdate(Na_(2)MoO_(4)) and hydrochloric acid(HCl).The reduction was carried out within 2 min.A series of characterization results revealed that the obtained reduced graphene oxide has higher reduction degree than that synthesized by NaBH_(4) alone at high temperature.Moreover,rGO electrode based on the present reducing method exhibited a superior specific capacitance of 139.8 F/g at a current density of1 A/g,indicating that it can be used as electrode materials for supercapacitors.

关键词： Carbon materials Reduced graphene oxide Sodium borohydride sodium molybdate Hydrochloric acid Supercapacitors

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The mechanism of unexpected reduction of dimethyl pyridine-2,3-dicarboxylate to l,2,3,4-tetrahydrofuro[3,4-b]-pyridin-5(7H)-one with Sodium borohydride

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Chinese Chemical Letters 2012年第10期23卷 1122-1124页

作者： Yan Bo Tang Qing Jian Zhang De Quan Yu State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

An unexpected reduction of dimethyl pyridine-2,3-dicarboxylate to 1,2,3,4-tetrahydrofuro[3,4-b]pyridin-5（7H）-one with Sodium borohydride in ethanol and tetrahydrofuran, respectively, is described, a hypothetic mecha... 详细信息

关键词： Reduction Sodium borohydride Dimethyl pyridine-2,3-dicarboxylate 1,2,3,4-Tetrahydrofuro[3,4-b]pyridin-5（7H）-one Reactionmechanism

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Hydrogen generation from methanolysis of Sodium borohydride over Co/Al_2O_3 catalyst

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Journal of Natural Gas Chemistry 2012年第5期21卷 488-494页

作者： Dongyan Xu Lin Zhao Ping Dai Shengfu Ji College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061ShandongChina State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

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.

关键词： hydrogen generation Sodium borohydride methanolysis cobalt

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Reductive amination of aldehydes and ketones using Sodium borohydride in the presence of silica chloride under solvent-free conditions

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Chinese Chemical Letters 2010年第1期21卷 47-50页

作者： Heshmatollah Alinezhad Mahmood Tajbakhsh Neda Hamidi Faculty of Chemistry Mazandaran UniversityBabolsarIran

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.

关键词： Reductive amination Silica chloride Solvent-free conditions Sodium borohydride

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Efficient hydrolysis of alkaline Sodium borohydride catalyzed by Co-B nanoparticles supported on Nitrogen doped reduction of graphene oxide

Efficient hydrolysis of alkaline sodium borohydride catalyze...

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中国化学会第七届全国热分析动力学与热动力学学术会议

作者： Jinghua Li Lixian Sun Fen Xu Bin Li Peirong Chen Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsSchool of Material Science and EngineeringGuilin University of Electronic Technology

＜正＞Co-B nanoparticles supported on Nitrogen doped reduction of graphene oxide（Co-B@NRGO） have been successfully prepared by a in situ reduction method[1].The microstructure and morphology of the Co-B@NRGO were characterized by X-ray diffraction,transmission electron microscopy,scanning electron microscopy and Brunauer-Emmett-Teller adsorption analysis.

关键词： Thermal analysis Sodium borohydride H2 generation Cobalt-boron Catalyst Nitrogen doped graphene

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Chemoselective Reduction of Fenofibric Acid to Alcohol in the Presence of Ketone by Mixed Anhydride and Sodium borohydride

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International Journal of Organic Chemistry 2022年第2期12卷 116-125页

作者： Greesha N. Majethia Wahajul Haq Ganesaratnam K. Balendiran Department of Chemistry Youngstown State University Youngstown OH USA

A highly efficient and facile protocol for the selective reduction of carboxylic acid of Fenofibric acid to corresponding alcohol was developed. The selective reduction was carried out by activation of carboxylic acid by mixed anhydride followed by the reaction of Sodium borohydride in presence of methanol. This is the first example of chemoselective reduction of carboxylic acid to alcohol in presence of a ketone without any external catalyst or ligand in a single step. The reaction offers wide applicability for the selective carboxylic group reduction methodology. The chemoselective reduction was demonstrated by the reduction of Fenofibric acid, an active metabolite of the drug Fenofibrate, to corresponding alcohol in excellent selectivity, yield, and purity.

关键词： Chemoselective Reduction of Carboxylic Acid Sodium borohydride Mixed Anhydride

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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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Chinese Chemical Letters 2002年第9期13卷 809-810页

作者： YuXIA XiangShuXIAO 等 ShanghaiInstituteofMateriaMedica ShanghaiInstituteforBiologicalSciencesChineseAcademyofSciencesShanghai200031 ShanghaiInstituteofMateriaMedica ShanghaiInstituteforBiologicalSciencesChineseAcademyof

Reduction of δ-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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A Convenient Hydrogenation Method for the Synthesis of Metallo-mesoporphyrin IX Dimethyl Esters via Self-catalyzed CoCI2-NaBH4 Reagent System

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Chinese Journal of Chemistry 2012年第10期30卷 2461-2465页

作者：徐士超胡炳成胡田菁王欢黄修有娄兴焜刘祖亮 School of Chemical Engineering Nanjing University of Science and TechnologyNanjingJiangsu 210094China

A convenient protocol has been developed for the hydrogenation of metallo-protoporphyrin IX dimethyl esters （MPPDMEs） to their mesoporphyrin analogues using CoC12-NaBH4 reagent system. Metallo-porphyrin complexes were found to perform as self-catalysts in this procedure. This method provides several advantages such as safe and simple procedure, short reaction time, high yields and low cost.

关键词： protoporphyrin catalytic hydrogenation mesoporphyrin cobalt chloride Sodium borohydride

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