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Transition Metal Atoms Embedded in Graphene: How Nitrogen Doping Increases CO Oxidation Activity

Journal Article · · ACS Catalysis
 [1];  [2]
  1. Univ. of Wisconsin-Madison, WI (United States); University of Wisconsin-Madison Department of Chemical and Biological Engineering
  2. 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

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Cited By (1)

On the active site for electrocatalytic water splitting on late transition metals embedded in graphene journal January 2019

Figures / Tables (3)


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