Nickel and cobalt bimetallic hydroxide catalysts for urea electro-oxidation

被引：294

作者：

Yan, Wei ^{[1
]}

Wang, Dan ^{[1
]}

Botte, Gerardine G. ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 2012年 / 61卷

关键词：

Urea electro-oxidation; Alkaline electrolysis; Nickel-Cobalt bimetallic hydroxide catalyst; Hydrogen production; ELECTROCHEMICAL PERFORMANCE; ELECTRODES; BEHAVIOR; RAMAN; HYDROGENATION; ADDITIVES; NI(OH)(2); OXIDATION; AMMONIA; ALLOYS;

D O I：

10.1016/j.electacta.2011.11.044

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nickel-Cobalt bimetallic hydroxide electrocatalysts, synthesized through a one-step electrodeposition method, were evaluated for the oxidation of urea in alkaline conditions with the intention of reducing the oxidation overpotential for this reaction. The Nickel-Cobalt bimetallic hydroxide catalysts were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS). Raman spectroscopy, cyclic voltammetry (CV), and polarization techniques. A significant reduction in the overpotential (150 mV) of the reaction was observed with the Nickel-Cobalt bimetallic hydroxide electrode (ca. 43% Co content) when compared to a nickel hydroxide electrode. The decrease of the urea oxidation potential on the Nickel-Cobalt bimetallic hydroxide electrodes reveals great potential for future applications of urea electro-oxidation, including wastewater remediation, hydrogen production, sensors, and fuel cells. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：25 / 30

页数：6

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