Transition Metal Atoms Embedded in Graphene: How Nitrogen Doping Increases CO Oxidation Activity
- Univ. of Wisconsin-Madison, WI (United States); University of Wisconsin-Madison Department of Chemical and Biological Engineering
- Univ. of Wisconsin-Madison, WI (United States)
We study 14 transition metals on pristine and N-doped graphene using density functional theory. For double vacancies, nitrogen doping increases the binding strength of harder transition metals to the support and reduces their oxygen affinity. Inversely, the oxygen affinity of softer metals increases. Since O2 binding energies are correlated with the CO oxidation barrier in a volcano-like trend, doping also affects the activity of the single-atom catalyst. Among these systems, Fe atoms embedded in N-doped graphene are the most active CO oxidation catalysts. Here, these insights can be used to guide the synthesis of highly active oxidation catalysts from nonprecious metals.
- Research Organization:
- Univ. of Wisconsin-Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357; FG02-05ER15731
- OSTI ID:
- 1635529
- Journal Information:
- ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 8 Vol. 9; ISSN 2155-5435
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
On the active site for electrocatalytic water splitting on late transition metals embedded in graphene
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journal | January 2019 |
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