Guangdong Provincial Key Laboratory for Fuel Cell Technology

Laboratory of, China

Guangdong Provincial Key Laboratory for Fuel Cell Technology

Laboratory of, China
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Li Y.,South China University of Technology | Li Y.,Guangdong Provincial Key Laboratory for Fuel Cell Technology | Zheng L.,South China University of Technology | Zheng L.,Guangdong Provincial Key Laboratory for Fuel Cell Technology | And 4 more authors.
Journal of Power Sources | Year: 2011

Highly dispersed Ru/C catalysts are prepared using high viscosity glycerol as a reducing agent and are treated in H2 atmosphere to ensure stability. A Pt∧Ru/C catalyst is prepared by an ethylene glycol process based on the pre-formed Ru/C. The catalyst is tested for methanol oxidation reaction at room temperature and is compared with the activity of the as-prepared PtRu/C alloyed catalyst (prepared by co-reduction of Pt and Ru precursors) and commercial PtRu/C from E-TEK. The catalysts are extensively characterized by Transmission electron microscope (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Electrochemical measurements by cyclic voltammetry (CV) showed consistently high catalytic activities and improved CO resistance for the Pt∧Ru/C catalyst. © 2011 Elsevier B.V. All rights reserved.


Liu B.,South China University of Technology | Liu B.,Guangdong Provincial Key Laboratory for Fuel Cell Technology | Zheng L.,South China University of Technology | Zheng L.,Guangdong Provincial Key Laboratory for Fuel Cell Technology | And 4 more authors.
Journal of Power Sources | Year: 2012

A scale-up preparation of high-loading Pt/C (40 wt%) to 3 g per pot has been achieved with a microwave-assisted organic colloid method, followed by appropriate heat treatment in alternating atmospheres (nitrogen, oxygen, and hydrogen). The catalysts prepared in this work were characterized by thermogravimetric analysis, X-ray diffraction analysis, and transmission electron microscopy etc., and were found to be competitive with state-of-the-art HiSPEC 4100 Pt/C catalyst in terms of their activities towards the anodic oxidation of methanol and the cathodic reduction of oxygen. They also displayed better cathodic activity and stability in a hydrogen/air single-cell test. The particle size was as small as 2.3 nm, which is smaller than HiSPEC 4100 Pt/C catalyst. The scale-up work reported in this paper provides a practicable method to achieve the volume production of a high-loading Pt/C catalyst for fuel cell applications. © 2012 Elsevier B.V. All rights reserved.

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