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

被引：1
|
作者：
Ding Xiao-Chun [1 ]
Chen Xiu [1 ]
Zhou Jian-Hua [1 ]
Wang Tao [1 ]
Sun Dun [1 ]
He Jian-Ping [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2011年 / 27卷 / 03期
基金：
中国国家自然科学基金;
关键词：
CMK-5; Pt/CMK-5; catalyst; Pt-Ni/CMK-5; Methanol; Electrooxidation; CARBON NANOTUBES; ALLOY NANOPARTICLES; ELECTROOXIDATION; PT/NI; ELECTROCATALYSTS; PT/RU; ANODE; CO; ELECTRODES; DEPOSITION;
D O I：
10.3866/PKU.WHXB20110327
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 m(2).g(-1). It has more resistance to CO poisoning than Pt/CMK-5.
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收藏
页码：711 / 716
页数：6
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