Catalysts for the hydrolysis of aqueous borohydride solutions to produce hydrogen for PEM fuel cells

被引：99
作者：
Krishnan, Palanicharny [2 ]
Hsueh, Kan-Lin [1 ]
Yim, Sung-Dae [2 ]
机构：
[1] ITRI, Energy & Environm Res Labs, Hsinchu 310, Taiwan
[2] KIER, Polymer Electrolyte Fuel Cell Res Dept, Taejon 305343, South Korea
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2007年 / 77卷 / 1-2期
关键词：
borohydride hydrolysis; hydrogen; PEM fuel cells; cobalt oxide (Co3O4); lithium cobalt oxide (LiCoO2); PtRu-supported catalysts;
D O I：
10.1016/j.apcatb.2007.07.024
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：
The objective of the present study was to understand the superior catalytic performance of PtRu-LiCoO2 catalyst for hydrogen (H-2) generation from aqueous sodium borohydride (NaBH4) Solutions by comparing the catalytic activity of various PtRu-supported catalysts. Three of the support materials namely cobalt oxide (Co3O4), lithium nickel oxide (LiNiO2) and lithium manganese oxide (LiMnO2) were synthesized and characterized using XRD. The PtRu-supported catalysts with eight different support materials were prepared and characterized using XRD and BET surface area measurements. The results revealed excellent hydrogen generation activity of Co3O4 and LiCoO2 for the hydrolysis of NaBH4. Actually, the catalytic activity of Co3O4 and LiCoO2 is due to the formation of cobalt boride (CoB) by the reduction of these oxides by NaBH4. A model is proposed to explain the hydrogen generation profile of the above catalysts. The COB formation is confirmed by XPS studies. Further, the performance of Co3O4 and LiCoO2 was compared with various noble metal catalysts. The performance of Co3O4 is at par with the noble metal based catalysts at low concentration of NaBH4 and far superior to noble metal based catalysts at higher concentration. (C) 2007 Elsevier B.V. All rights reserved.
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页码：206 / 214
页数：9
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