Investigation of multi-metal catalysts for stable hydrogen production via urea electrolysis

被引：210

作者：

King, Rebecca L. ^{[1
]}

Botte, Gerardine G. ^{[1
]}

机构：

[1] Ohio Univ, Stocker Ctr 165, Dept Chem & Biomol Engn, Ctr Electrochem Engn Res, Athens, OH 45701 USA

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 22期

关键词：

Urea electrolysis; Hydrogen production; Electrodeposition; Multi-metal electrocatalysts; OXIDATION; AMMONIA; ELECTROOXIDATION; PLATINUM; RHODIUM;

D O I：

10.1016/j.jpowsour.2011.06.079

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：

It has been shown that urea electrolysis is a viable method for wastewater remediation and simultaneous production of valuable hydrogen. Inexpensive nickel catalyst is optimal for the oxidation of urea in alkaline media but improvements are needed to minimize surface blockage and increase current density. Multi-metal catalysts were investigated by depositing platinum group metals on a nickel substrate. Rhodium and nickel proved synergistic to reduce surface blockage and increase catalyst stability. Rh-Ni electrodes reduced the overpotential for the electro-oxidation of urea and improved the current density by a factor of 200 compared to a Ni catalyst. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：9579 / 9584

页数：6

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