石墨烯负载Pt/Co双金属纳米颗粒催化剂的制备及催化制氢性能  

Preparation and Catalytic Activity of Graphene Supported Pt/Co Nanoparticles for Hydrogen Generation from KBH4

作　　者：李晓莉 黄亮[1] 段红娟[1] 张力[1] 张海军[1] LI Xiaoli;HUANG Liang;DUAN Hongjuan;ZHANG Li;ZHANG Haijun(State Key Laboratory of Refractory and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室

出　　处：《高等学校化学学报》2019年第8期1662-1669,共8页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51672194,51872210);湖北省教育厅高等学校优秀中青年科技创新团队计划(批准号:T201602);湖北省自然科学基金创新群体项目(批准号:2017CFA004);武汉科技大学省部共建耐火材料与冶金国家重点实验室青年基金(批准号:2014QN02)资助~~

摘　　要：采用化学共还原方法制备了石墨烯负载Pt/Co双金属纳米颗粒(GBNPS)催化剂,并将其用于催化硼氢化钾(KBH 4)水解制氢.采用透射电子显微镜(TEM)、X射线衍射(XRD)仪和X射线光电子能谱(XPS)表征了该催化剂,并研究了双金属纳米颗粒的化学组成对其催化KBH 4水解制氢性能的影响.结果表明,制备的石墨烯负载Pt/Co双金属纳米颗粒平均粒径为3.2~3.9 nm,其中石墨烯负载Pt 20 Co 80双金属纳米颗粒的催化活性最高,35℃时制氢活性可达35973 mol H 2·h^-1·mol^-1 Pt,且具有良好的耐久性,催化KBH 4水解反应的表观活化能为36 kJ/mol.Graphene supported Pt/Co bimetallic nanoparticles(GBNPS) were prepared using a chemical co-reduction method. The obtained GBNPS were characterized by transmission electron microscope(TEM), high-resolution transmission electron microscopy(HRTEM), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The effects of metal compositions on the hydrolysis reaction of the alkaline KBH 4 solution were studied. The results indicated that the average particle size of GBNPS was from 3.2 nm to 3.9 nm. Pt 20 Co 80 GBNPS displayed the highest catalytic activity, showing a high hydrogen release rate of 35973.35 mol H 2 ·h ^-1 ·mol ^-1 Pt at 35 ℃. Pt 20 Co 80 GBNPS showed the corresponding apparent activation energy of 36 kJ/mol for the hydrolysis of an alkaline KBH 4 .

关 键 词：石墨烯负载 Pt/Co双金属纳米颗粒 KBH 4 催化活性 

分 类 号：O643[理学—物理化学]