Citation: DING Xiao-Chun, CHEN Xiu, ZHOU Jian-Hua, WANG Tao, SUN Dun, HE Jian-Ping. Pt-Ni Catalyst Supported on CMK-5 for the Electrochemical Oxidation of Methanol[J]. Acta Physico-Chimica Sinica, ;2011, 27(03): 711-716. doi: 10.3866/PKU.WHXB20110327 shu

Pt-Ni Catalyst Supported on CMK-5 for the Electrochemical Oxidation of Methanol

1.
College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China

Received Date: 27 October 2010
Available Online: 16 February 2011
Fund Project: 国家自然科学基金(50871053)资助项目 (50871053)

Pt-Ni alloy catalysts with different atomic ratios were deposited on CMK-5 (carbon replicated from SBA-15 silica) by NaBH₄ reduction. X-ray diffraction (XRD) suggests alloy formation between Pt and Ni. X-ray photoelectron spectroscopy (XPS) shows that Pt-Ni/CMK-5 (5:1) has more detectable oxidized Ni. More metallic Pt is present on Pt-Ni/CMK-5 (5:1) (atomic ratio) than on Pt/CMK-5. Oxidized Ni species, such as NiO, Ni(OH)₂， and NiOOH, favor the adsorption of methanol and the dissociation of methanol from the surface of Pt. Cyclic voltammetry shows that Pt-Ni/CMK-5 (5:1) has the highest specific activity among the as-made catalysts and its electrochemical active area is 63.9 m²·g^-1. It has more resistance to CO poisoning than Pt/CMK-5.
- CMK-5,
- Pt/CMK-5 catalyst,
- Pt-Ni/CMK-5 catalyst,
- Methanol,
- Electrooxidation
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