Palladium-Copper Electrocatalyst for Promotion of Oxidation of Formate and Ethanol in Alkaline Media

被引：90

作者：

Noborikawa, Jennifer ^{[1
]}

Lau, Julie ^{[1
]}

Ta, Jennine ^{[1
]}

Hu, Shouzhen ^{[2
]}

Scudiero, Louis ^{[3
,4
]}

Derakhshan, Shahab ^{[5
]}

Ha, Su ^{[2
,6
]}

Haan, John L. ^{[1
]}

机构：

[1] Calif State Univ Fullerton, Dept Chem & Biochem, Fullerton, CA 92834 USA

[2] Washington State Univ, Gene & Linda Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA

[3] Washington State Univ, Dept Chem, Pullman, WA 99164 USA

[4] Washington State Univ, Mat Sci & Engn Program, Pullman, WA 99164 USA

[5] Calif State Univ Long Beach, Dept Chem & Biochem, Long Beach, CA 90840 USA

[6] Kyung Hee Univ, Dept Chem Engn, Yongin 449701, Gyeonggi Do, South Korea

来源：

ELECTROCHIMICA ACTA | 2014年 / 137卷

基金：

美国国家科学基金会;

关键词：

Formate oxidation; Formic acid oxidation; Ethanol oxidation; Alkaline direct liquid fuel cell; Electronic effect; SOLAR-ENERGY UTILIZATION; CARBON-DIOXIDE; FORMIC-ACID; FUEL-CELL; ELECTROCHEMICAL REDUCTION; BIMETALLIC SURFACES; ELECTRO-REDUCTION; PD; CONVERSION; ELECTROOXIDATION;

D O I：

10.1016/j.electacta.2014.04.188

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pd-Cu/C and Pd/C catalysts were synthesized via a metal salt reduction method. Physical, chemical, and electrochemical characterizations of these two catalysts were compared and used to understand the impact of copper on the palladium surface during the electrochemical oxidation of formate and ethanol in alkaline media. Cyclic voltammetry and chronoamperometry display an enhanced oxidation rate and stability for Pd-Cu/C alloy catalyst toward formate and ethanol in alkaline media when compared to Pd/C catalyst. The binding energy of the core level of Pd 3d and the d-band center of Pd were upshifted in the case of Pd-Cu/C catalyst compared to the Pd/C catalyst indicating a charge transfer between these two metals. These results demonstrate that the addition of Cu induces an electronic effect on the Pd surface significantly contributing to the increase in oxidation rates for both formate and ethanol in alkaline media (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：654 / 660

页数：7

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