Pt and Ru dispersed on LiCoO2 for hydrogen generation from sodium borohydride solutions

被引：148
作者：
Liu, Zhaolin [1 ]
Guo, Bing [1 ]
Chan, Siew Hwa [2 ,3 ]
Tang, Ee Ho [4 ]
Hong, Liang [1 ]
机构：
[1] Inst Mat Res & Engn, Singapore 117602, Singapore
[2] ASTAR, Agcy Sci Techol & Res SERC, Fuel Cell Programme, Singapore 138671, Singapore
[3] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Fuel Cell Strateg Res Programme, Singapore 639798, Singapore
[4] Def Sci & Technol Agcy, Directorate Res & Dev, Singapore 109679, Singapore
来源：
JOURNAL OF POWER SOURCES | 2008年 / 176卷 / 01期
关键词：
sodium borohydride; hydrogen generation; platinum; ruthenium; lithium cobalt oxide; proton exchange membrane fuel cell;
D O I：
10.1016/j.jpowsour.2007.09.114
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nano-sized platinum and ruthenium dispersed on the surface LiCoO(2) as catalysts for borohydride hydrolysis are prepared by microwave-assisted polyol process. The catalysts are characterized by transmission electron microscopy (TEM), X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). Very uniform Pt and Ru nanoparticles with sizes of <10nm are dispersed on the surface of LiCoO(2). XRD patterns show that the Pt/LiCoO(2) and Ru/LiCoO(2) catalysts only display the characteristic diffraction peaks of a LiCoO(2) crystal structure. Results obtained from XPS analysis reveal that the Pt/LiCoO(2) and Ru/LiCoO(2) catalysts contain mostly Pt(0) and Ru(0), with traces of Pt(IV) and Ru(IV), respectively. The hydrogen generation rates using low noble metal loading catalysts, 1 wt.% Pt/LiCoO(2) and 1 wt.% Ru/LiCoO(2), are very high. The hydrogen generation rate using Ru/LiCoO(2) as a catalyst is slightly higher compared with that of Pt/LiCoO(2). (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：306 / 311
页数：6
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