Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea.
J Am Chem Soc. 2010 Oct 27;132(42):14700-1. doi: 10.1021/ja104672n.
A new approach to preventing electrochemical carbon corrosion in the cathode of polymer electrolyte membrane fuel cells (PEMFCs) was developed. The addition of 2 wt % IrO(2) (0.016 mg cm(-2)) to the catalyst layer of the cathode was demonstrated to reduce the electrochemical corrosion of carbon by 76% at 1.6 V(NHE) and 70 °C compared with a commercial Pt/C catalyst of the same Pt loading of 0.4 mg cm(-2) and under the same test conditions. The IrO(2) was shown to behave as a catalyst for water electrolysis, thereby removing water from the catalyst layer, which promoted electrochemical carbon corrosion.
开发了一种防止聚合物电解质膜燃料电池 (PEMFC) 阴极电化学碳腐蚀的新方法。在相同的 Pt 负载量（0.4 mg cm(-2)）和相同的测试条件下，与商业 Pt/C 催化剂相比，在阴极的催化剂层中添加 2 wt % IrO(2)（0.016 mg cm(-2)）可将 1.6 V(NHE)和 70°C 下的碳电化学腐蚀降低 76%。IrO(2) 表现为水电解催化剂，从而将水从催化剂层中除去，这促进了电化学碳腐蚀。
