Preparation and Research of AuNi Cathode Catalyst for Direct Methanol Fuel Cell
AuNi alloy was synthesized by vacuum arc melting in high-purity argon atmosphere. The AuNi alloy was characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The results of EDS indicated that Au and Ni atoms were well-distributed in the alloy. Moreover the results of XPS exhibited an electronic transfer from Ni to Au in AuNi phase. The Electrocatalytic oxygen reduction reaction (ORR) activity and the methanol tolerance of the AuNi alloy were respectively investigated using the RDE method and the electrochemical cyclic voltammetry. The results suggested that O2 was directly oxidized to H2O on the AuNi catalyst via an approximate fourelectron reduction pathway, and that the AuNi catalyst had a high electrocatalytic activity for the ORR and an acceptable methanol tolerance, simultaneously.
Direct methanoi fuel cells Cathode catalyst AuNi alloy Oxygen reduction reaction
Shaohui Yan Weiii Zhu Shichao Zhang
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Bei China National Building Materials Group Corporation, 100048, China
国际会议
合肥
英文
1039-1043
2011-09-23（万方平台首次上网日期，不代表论文的发表时间）