The addition of Ir-based water electrolysis catalysts to the catalyst layer in polymer electrolyte membrane fuel cells was examined as a promising approach for preventing electrochemical carbon corrosion under severely corrosive conditions. Electrochemical carbon corrosion of membrane electrode assemblies containing different amounts of IrO2 or shape-controlled Ir dendrite catalysts were characterized using on-line mass spectrometry. In particular, Ir dendrite catalysts possess high activity toward oxygen evolution reactions when compared to IrO2. As a result, Ir dendrites provided a very effective method of removing water from the catalyst layer. Therefore, the addition of 1 wt% Ir dendrite (0.008 mg cm-2) to the catalyst layer of the cathode decreased electrochemical carbon corrosion by 84% at 1.6 VNHE compared with a conventional membrane electrode assembly in the absence of water electrolysis catalysts.
Bibliographical noteFunding Information:
This work was supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea Government Ministry of Knowledge Economy (No. 20104010100500 ) and the Priority Research Centers Program through the National Research Foundation of Korea ( 2009-0093823 ) and the National Research Foundation of Korea ( NRF-2009-C1AAA001-0092926 ) funded by the Ministry of Education, Science and Technology .
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology