Nano-silicon carbide supported catalysts for PEM fuel cells with high electrochemical stability and improved performance by addition of carbon
Nano-silicon carbide supported catalysts for PEM fuel cells with high electrochemical stability and improved performance by addition of carbon
复制标题
用于质子交换膜燃料电池的纳米碳化硅负载催化剂具有高电化学稳定性并通过添加碳改善性能
DOI：
10.1016/j.apcatb.2010.07.030
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发表时间：
2010-10-11
影响因子：
22.1
通讯作者：
Pan, Mu
中科院分区：
文献类型：
--
作者：
Lv, Haifeng;Mu, Shichun;Pan, Mu
纳米碳化硅由于其优异的抗电化学氧化性能，被用作质子交换膜燃料电池的新型催化剂载体，以提高催化剂的稳定性。采用乙二醇还原法制备了均匀分散的铂纳米颗粒。此外，在Pt/SiC催化剂（Pt/SiC/C）中引入碳，通过提高电导率来改善其电催化性能。研究了SiC的电化学稳定性，在1.20V下氧化48 h后，其氧化还原区几乎没有变化。基于加速耐久性测试（ADT）和高分辨率透射电镜（HRTEM）， Pt/SiC/C催化剂的电化学稳定性比Pt/C催化剂显著增强，这可能是由于SiC载体的优异稳定性和高导电性碳的加入。(C) 2010 Elsevier B.V.版权所有
Nano-silicon carbide was applied as a novel catalyst support in proton exchange membrane (PEM) fuel cells to improve catalyst stability, due to its excellent resistance to electrochemical oxidation. Homogeneously dispersed Pt nanoparticles were deposited on beta-sic (Pt/SiC) using an ethylene glycol reduction method. Furthermore, carbon was introduced into this Pt/SiC catalyst, (Pt/SiC/C), to improve its electrocatalytic performance by increasing the electrical conductivity. The electrochemical stability of SiC was investigated and showed almost no changes in the redox region after oxidation for 48 h at 1.20V. Based on accelerated durability tests (ADT) and high-resolution transmission electron microscopy (HRTEM), the electrochemical stability of Pt/SiC/C was remarkably enhanced compared with the Pt/C catalysts, which could be attributed to the excellent stability of the SiC support and the addition of high electrical conductivity carbon. (C) 2010 Elsevier B.V. All rights reserved.