Platinum catalyst on ordered mesoporous carbon with controlled morphology for methanol electrochemical oxidation
Platinum catalyst on ordered mesoporous carbon with controlled morphology for methanol electrochemical oxidation
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DOI：
10.1016/j.apsusc.2010.04.071
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发表时间：
2010-09
影响因子：
6.7
通讯作者：
L. Kong;Hengyi Li;Jing Zhang;Yong-chun Luo;L. Kang
中科院分区：
文献类型：
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作者：
L. Kong;Hengyi Li;Jing Zhang;Yong-chun Luo;L. Kang
以不同的介孔氧化硅SBA-15为模板合成了不同形貌的有序介孔碳CMK-3，并将其负载到Pt/CMK-3催化剂上。在硫酸溶液中甲醇氧化的电催化活性方面进行了比较所获得的催化剂。结构表征和电化学分析表明，以CMK-3为载体的大粒径长通道Pt催化剂具有更大的电化学活性表面积（ECSA）和更高的甲醇氧化活性。Pt/CMK-3催化剂性能较好的原因可能是由于Pt催化剂具有较大的电极/电解质界面面积和较大的ECSA值，这将提供更好的结构，有利于质量传递和电子传递。
Ordered mesoporous carbons CMK-3 with various morphologies are synthesized by using various mesoporous silica SBA-15 as template and then support to prepare Pt/CMK-3 catalyst. The obtained catalysts are compared in terms of the electrocatalytic activity for methanol oxidation in sulfuric acidic solutions. The structure characterizations and electrochemical analysis reveal that Pt catalysts with the CMK-3 support of large particle size and long channel lengths possess larger electrochemical active surface area (ECSA) and higher activity toward methanol oxidation than those with the other two supports. The better performance of Pt/CMK-3 catalyst may be due to the larger area of electrode/electrolyte interface and larger ECSA value of Pt catalyst, which will provide better structure in favor of the mass transport and the electron transport.