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Materials 2013, 6(7), 2689-2700; doi:10.3390/ma6072689
Article

Effect of Ni Core Structure on the Electrocatalytic Activity of Pt-Ni/C in Methanol Oxidation

1
, 1,* , 1
, 2
, 3
, 3
 and 3,*
Received: 16 February 2013; in revised form: 7 April 2013 / Accepted: 16 April 2013 / Published: 8 July 2013
(This article belongs to the Special Issue Advances in Catalytic Materials)
Download PDF [1056 KB, uploaded 8 July 2013]
Abstract: Methanol oxidation catalysts comprising an outer Pt-shell with an inner Ni-core supported on carbon, (Pt-Ni/C), were prepared with either crystalline or amorphous Ni core structures. Structural comparisons of the two forms of catalyst were made using transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), and methanol oxidation activity compared using CV and chronoamperometry (CA). While both the amorphous Ni core and crystalline Ni core structures were covered by similar Pt shell thickness and structure, the Pt-Ni(amorphous)/C catalyst had higher methanol oxidation activity. The amorphous Ni core thus offers improved Pt usage efficiency in direct methanol fuel cells.
Keywords: electrocatalysts; amorphous; core-shell structure; fuel cell; methanol oxidation electrocatalysts; amorphous; core-shell structure; fuel cell; methanol oxidation
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.

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MDPI and ACS Style

Kang, J.; Wang, R.; Wang, H.; Liao, S.; Key, J.; Linkov, V.; Ji, S. Effect of Ni Core Structure on the Electrocatalytic Activity of Pt-Ni/C in Methanol Oxidation. Materials 2013, 6, 2689-2700.

AMA Style

Kang J, Wang R, Wang H, Liao S, Key J, Linkov V, Ji S. Effect of Ni Core Structure on the Electrocatalytic Activity of Pt-Ni/C in Methanol Oxidation. Materials. 2013; 6(7):2689-2700.

Chicago/Turabian Style

Kang, Jian; Wang, Rongfang; Wang, Hui; Liao, Shijun; Key, Julian; Linkov, Vladimir; Ji, Shan. 2013. "Effect of Ni Core Structure on the Electrocatalytic Activity of Pt-Ni/C in Methanol Oxidation." Materials 6, no. 7: 2689-2700.


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