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Catalysts 2015, 5(3), 1003-1015; doi:10.3390/catal5031003

Synthesis and Electrocatalytic Performance of Multi-Component Nanoporous PtRuCuW Alloy for Direct Methanol Fuel Cells

1
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan 250061, China
2
Laboratory for Microstructures, Shanghai University, 99 Shangda Road, Shanghai 200436, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Minhua Shao
Received: 28 April 2015 / Revised: 27 May 2015 / Accepted: 16 June 2015 / Published: 24 June 2015
(This article belongs to the Special Issue Electrocatalysis in Fuel Cells)
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Abstract

We have prepared a multi-component nanoporous PtRuCuW (np-PtRuCuW) electrocatalyst via a combined chemical dealloying and mechanical alloying process. The X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements have been applied to characterize the microstructure and electrocatalytic activities of the np-PtRuCuW. The np-PtRuCuW catalyst has a unique three-dimensional bi-continuous ligament structure and the length scale is 2.0 ± 0.3 nm. The np-PtRuCuW catalyst shows a relatively high level of activity normalized to mass (467.1 mA mgPt1) and electrochemically active surface area (1.8 mA cm2) compared to the state-of-the-art commercial PtC and PtRu catalyst at anode. Although the CO stripping peak of np-PtRuCuW 0.47 V (vs. saturated calomel electrode, SCE) is more positive than PtRu, there is a 200 mV negative shift compared to PtC (0.67 V vs. SCE). In addition, the half-wave potential and specific activity towards oxygen reduction of np-PtRuCuW are 0.877 V (vs. reversible hydrogen electrode, RHE) and 0.26 mA cm−2, indicating a great enhancement towards oxygen reduction than the commercial PtC. View Full-Text
Keywords: direct methanol fuel cells; methanol oxidation; oxygen reduction reaction; dealloying; nanoporous alloys direct methanol fuel cells; methanol oxidation; oxygen reduction reaction; dealloying; nanoporous alloys
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chen, X.; Wang, H.; Wang, Y.; Bai, Q.; Gao, Y.; Zhang, Z. Synthesis and Electrocatalytic Performance of Multi-Component Nanoporous PtRuCuW Alloy for Direct Methanol Fuel Cells. Catalysts 2015, 5, 1003-1015.

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