Influences of Mesopore Size on Oxygen Reduction Reaction Catalysis of Pt/Carbon Aerogels

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• 作者：Hongda Du ; Lin Gan ; Baohua Li ; Peng Wu ; Yiling Qiu ; Feiyu Kang ; Ruowen Fu ; Yuqun Zeng
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：February 8, 2007
• 年：2007
• 卷：111
• 期：5
• 页码：2040 - 2043
• 全文大小：228K
• 年卷期：v.111,no.5(February 8, 2007)
• ISSN：1932-7455

文摘

A series of carbon aerogel (CA) samples with different pore sizes were loaded with platinum nanoparticlesthrough the polyol reduction method. All the Pt/CAs possess nano Pt particles (2.5-3.5 nm) and uniformdispersion. The catalytic activities to oxygen reduction reaction (ORR) of Pt/CAs were evaluated by cyclicvoltammetry in O₂ saturated HClO₄ with a rotating disk electrode. The catalytic activities of Pt/CAs arehigher than that of commercial carbon black supported catalyst with the same Pt loading amount. Among thePt/CAs, the relationship between ORR activity and mean meso pore size shows that the greater meso poresize can promote the catalysis activity. In the present study, the carbon aerogel with the mean meso pore sizeof 18.5 nm achieves the best ORR performance.