Methanol-tolerant Carbon Supported Phthalocyanine-platinum Nanocomposite Catalytic Cathode

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (3): 748.

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Methanol-tolerant Carbon Supported Phthalocyanine-platinum Nanocomposite Catalytic Cathode

ZHENG Ning, LIU Yan*, WANG Yuan*

Beijing National Laboratory for Molecular Sciences, State Key Lab for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

Received:2010-10-18 Revised:2010-11-26 Online:2011-03-10 Published:2011-02-23
Supported by:
国家自然科学基金(批准号: 20803001, 20973003, 50821061)资助.

Abstract

Abstract: A H2Pc-Pt/C nanocomposite catalyst was prepared and characterized by TEM, XRD and ICP. In an O2-saturated H2SO4 solution containing methanol (0.5 M), the onset potential over the H2Pc-Pt/C-Nafion? electrode shifted by more than 200 mV toward positive relative to that over an electrode prepared with a commercial Pt/C-JM catalyst and Nafion? (Pt/C-JM-Nafion?), and the specific current density at 0.85V of the H2Pc-Pt/C-Nafion? electrode for oxygen reduction reaction (ORR) is about 7 times larger than that of the Pt/C-JM-Nafion? electrode. Different from FePc, H2Pc does not form ethanol soluble complex with Nafion?. The excellent methanol tolerance of H2Pc-Pt/C-Nafion? is mainly derived from the presence of high active and selective catalytic sites for ORR in the catalytic electrode.

Key words: nanocomposite catalyst, direct methanol fuel cells, phthalocyanine, methanol tolerance, oxygen reduction reaction

CLC Number:

O646.54

TrendMD:

ZHENG Ning, LIU Yan*, WANG Yuan*. Methanol-tolerant Carbon Supported Phthalocyanine-platinum Nanocomposite Catalytic Cathode[J]. Chem. J. Chinese Universities, 2011, 32(3): 748.

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Methanol-tolerant Carbon Supported Phthalocyanine-platinum Nanocomposite Catalytic Cathode

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