Neutral red as electron transfer mediator: enhanced electrocatalytic activity of platinum catalyst for methanol electro-oxidation
Neutral red as electron transfer mediator: enhanced electrocatalytic activity of platinum catalyst for methanol electro-oxidation
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DOI：
10.1007/s10008-006-0174-3
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发表时间：
2007-01
影响因子：
2.5
通讯作者：
X. Zhong;Jinhua Chen;Bo Liu;Yan Xu;Y. Kuang
中科院分区：
文献类型：
--
作者：
X. Zhong;Jinhua Chen;Bo Liu;Yan Xu;Y. Kuang
将有机分子中性红（NR）作为电子转移介体引入甲醇氧化的阳极电催化剂体系中，并通过循环伏安法、极化法和电化学阻抗谱对所得电极进行了研究。对于相同负载质量的铂催化剂，与不含NR的电极相比，Pt/NR/石墨电极可以获得高1.25倍的交换电流密度、高1.83倍的比活性和更好的长期循环稳定性。这些结果表明，中性红对于增强铂催化剂甲醇氧化的电催化活性起着重要作用。
Organic molecule neutral red (NR), as electron transfer mediator, was introduced in the anodic electrocatalyst system for methanol oxidation and the resulting electrode was investigated by cyclic voltammetry, polarization method, and electrochemical impedance spectroscopy. For the same loading mass of platinum catalyst, 1.25 times larger exchange current density, 1.83 times higher specific activity, and better long-term cycle stability can be obtained at Pt/NR/graphite electrode, as compared to the electrode without NR. These results indicate that neutral red plays an important role on the enhanced electrocatalytic activity of platinum catalyst for methanol oxidation.