%ALiu, Shengwen [Department of Chemical and Biological Engineering University at Buffalo, The State University of New York Buffalo NY 14260 USA]%AWang, Maoyu [School of Chemical, Biological, and Environmental Engineering Oregon State University Corvallis OR 97331 USA]%AYang, Xiaoxuan [Department of Chemical and Biological Engineering University at Buffalo, The State University of New York Buffalo NY 14260 USA]%AShi, Qiurong [Department of Chemical and Biological Engineering University at Buffalo, The State University of New York Buffalo NY 14260 USA]%AQiao, Zhi [Department of Chemical and Biological Engineering University at Buffalo, The State University of New York Buffalo NY 14260 USA]%ALucero, Marcos [School of Chemical, Biological, and Environmental Engineering Oregon State University Corvallis OR 97331 USA]%AMa, Qing [DND-CAT Synchrotron Research Center Northwestern University Evanston IL 60208 USA]%AMore, Karren [Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA]%ACullen, David [Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA]%AFeng, Zhenxing [School of Chemical, Biological, and Environmental Engineering Oregon State University Corvallis OR 97331 USA]%AWu, Gang [Department of Chemical and Biological Engineering University at Buffalo, The State University of New York Buffalo NY 14260 USA]%BJournal Name: Angewandte Chemie; Journal Volume: 132; Journal Issue: 48; Related Information: CHORUS Timestamp: 2023-09-02 00:17:00 %D2020%IWiley Blackwell (John Wiley & Sons) %JJournal Name: Angewandte Chemie; Journal Volume: 132; Journal Issue: 48; Related Information: CHORUS Timestamp: 2023-09-02 00:17:00 %K %MOSTI ID: 10193662 %PMedium: X %TChemical Vapor Deposition for Atomically Dispersed and Nitrogen Coordinated Single Metal Site Catalysts %XAbstract

Atomically dispersed and nitrogen coordinated single metal sites (M‐N‐C, M=Fe, Co, Ni, Mn) are the popular platinum group‐metal (PGM)‐free catalysts for many electrochemical reactions. Traditional wet‐chemistry catalyst synthesis often requires complex procedures with unsatisfied reproducibility and scalability. Here, we report a facile chemical vapor deposition (CVD) strategy to synthesize the promising M‐N‐C catalysts. The deposition of gaseous 2‐methylimidazole onto M‐doped ZnO substrates, followed by an in situ thermal activation, effectively generated single metal sites well dispersed into porous carbon. In particular, an optimal CVD‐derived Fe‐N‐C catalyst exclusively contains atomically dispersed FeN4sites with increased Fe loading relative to other catalysts from wet‐chemistry synthesis. The catalyst exhibited outstanding oxygen‐reduction activity in acidic electrolytes, which was further studied in proton‐exchange membrane fuel cells with encouraging performance.

%0Journal Article