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Chemical Vapor Deposition for Atomically Dispersed and Nitrogen Coordinated Single Metal Site Catalysts
- Source :
- Angewandte Chemie. 132:21882-21889
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- Atomically dispersed and nitrogen coordinated single metal sites (M-N-C, M=Fe, Co, Ni, or 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 chemical vapor deposition (CVD) strategy to synthesize the promising single metal site (M-N-C) catalysts. The deposition of gaseous 2-methylimidazole onto ZnO substrates doped with M, followed by an in-situ thermal activation, was proved effective in generating single metal sites well dispersed into porous carbon. In particular, an optimal CVD-derived Fe-N-C catalyst is featured with atomically dispersed FeN4 sites 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. The CVD synthesis sheds some light on the mass production of single metal site catalysts towards advanced electrocatalysis.
- Subjects :
- inorganic chemicals
Materials science
010405 organic chemistry
chemistry.chemical_element
General Chemistry
Chemical vapor deposition
General Medicine
010402 general chemistry
Electrocatalyst
Electrochemistry
01 natural sciences
Nitrogen
Catalysis
0104 chemical sciences
Metal
chemistry
Chemical engineering
visual_art
visual_art.visual_art_medium
Deposition (phase transition)
Platinum
Subjects
Details
- ISSN :
- 15213757 and 00448249
- Volume :
- 132
- Database :
- OpenAIRE
- Journal :
- Angewandte Chemie
- Accession number :
- edsair.doi.dedup.....017e96275c548a500e495515b708495d