Carbon monoxide powered fuel cell towards H2-onboard purification

• 作者: Yang Li Xian Wang Bingbao Mei Ying Wang Zhaoyan Luo Ergui Luo Xiaolong Yang Zhaoping Shi Liang Liang Zhao Jin Zhijian Wu Zheng Jiang Changpeng Liu Wei Xing Junjie Ge
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2021,（13）
• 所属期刊栏目: ARTICLES
• 页码范围: 1305-1311
• 页数: 7页
• 语种: 英文

摘要

Proton exchange membrane fuel cells(PEMFCs)suffer extreme CO poisoning even at PPM level(＜10 ppm),owning to the preferential CO adsorption and the consequential blockage of the catalyst sur-face.Herein,however,we report that CO itself can become an easily convertible fuel in PEMFC using atomically dispersed Rh catalysts(Rh-N-C).With CO to CO2 conversion initiates at 0 V,pure CO powered fuel cell attains unprecedented power density at 236 mW cm-2,with maximum CO turnover frequency(64.65 s-1,363 K)far exceeding any chemical or electrochemical catalysts reported.Moreover,this fea-ture enables efficient CO selective removal from H2 gas stream through the PEMFC technique,with CO concentration reduced by one order of magnitude through running only one single cell,while simultane-ously harvesting electricity.We attribute such catalytic behavior to the weak CO adsorption and the co-activation of H2O due to the interplay between two adjacent Rh sites.