Electrocatalytic corrosion of carbon support in PEMFC cathodes
Electrocatalytic corrosion of carbon support in PEMFC cathodes
复制标题
DOI：
10.1149/1.1630412
复制
发表时间：
2004-01-01
影响因子：
--
通讯作者：
Jarvic, TD
中科院分区：
文献类型：
--
作者：
Roen, LM;Paik, CH;Jarvic, TD
铂对碳催化剂载体腐蚀的影响已通过循环伏安法期间的在线质谱法进行了表征，其中铂质量分数、催化剂类型和温度各不相同。 CO2 生成率随着 Pt 质量分数的增加而增加（Vulcan XC-72 平衡为 0%、10% 和 39%）。对于 Pt/C，在约 +0.55 VRHE 处观察到的峰值降至对于 PtRu/C 的 +0.45 V-RHE。 Arrenhius 图表明，在循环伏安图的正电势极限下，0% Pt（纯碳）电极上产生 CO2 的表观活化能高于 39% Pt/C 电极。结论是铂加速了碳催化剂载体的腐蚀速率。 (C) 2003 年电化学协会。
The influence of platinum on the corrosion of carbon catalyst supports has been characterized by on-line mass spectroscopy during cyclic voltammetry, with varying Pt mass fraction, catalyst type, and temperature. The CO2 generation rates increased with higher Pt mass fraction (0, 10, and 39% balanced by Vulcan XC-72). A peak observed at approximately +0.55 VRHE for Pt/C was lowered to +0.45 V-RHE for PtRu/C. An Arrenhius plot indicated higher apparent activation energy for CO2 production at the positive potential limit of the cyclic voltammogram on 0% Pt (carbon-only) electrode than on 39% Pt/C electrode. It was concluded that platinum accelerated the corrosion rate of the carbon catalyst support. (C) 2003 The Electrochemical Society.