Aqueous-based synthesis of ruthenium-selenium catalyst for oxygen reduction reaction

被引：39

作者：

Delacote, Cyril ^{[1
]}

Bonakdarpour, Arman ^{[1
]}

Johnston, Christina M. ^{[2
]}

Zelenay, Piotr ^{[2
]}

Wieckowski, Andrzej ^{[1
]}

机构：

[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[2] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA

来源：

FARADAY DISCUSSIONS | 2008年 / 140卷

关键词：

D O I：

10.1039/b806377j

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：

Carbon-supported Se/Ru(Se) catalysts of a broad range of composition were synthesized via a reduction procedure in which a mixture of RuCl3, SeO2 and Black Pearl carbon was treated with NaBH4 in basic media at room temperature. Physical characterization of the catalyst was performed by X-ray diffraction, energy dispersive X-ray spectroscopy and by high resolution transmission electron microscopy. The effect of NaOH addition during the reduction by NaBH4 and the impact of a post-reduction thermal treatment at 500 degrees C were interrogated. The activity of the catalyst towards the oxygen reduction reaction was studied by the use of a rotating disk electrode. It was found that the half-wave potential for the oxygen reduction reaction was about 0.78 V vs. RHE. The Se-to-Ru ratio and metal loading on carbon were optimized for the oxygen reduction reaction and the optimized catalyst was tested at the cathode of a polymer electrolyte fuel cell. The stability of the Se/Ru( Se) catalyst was evaluated by electrochemical cycling and by leaching the catalyst in 0.5 M H2SO4 at 80 degrees C.

引用

页码：269 / 281

页数：13

共 39 条

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