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Stabilization of Cu2O through Site-Selective Formation of a Co1Cu Hybrid Single-Atom Catalyst

Wang, Chunlei ; Kong, Yuan ; Soldemo, Markus ; Wu, Zongfang ; Tissot, Héloise ; Karagoz, Burcu ; Marks, Kess ; Stenlid, Joakim Halldin ; Shavorskiy, Andrey LU and Kokkonen, Esko LU orcid , et al. (2022) In Chemistry of Materials 34(5). p.2313-2320
Abstract

Single-atom catalysts (SACs) consist of a low coverage of isolated metal atoms dispersed on a metal substrate, called single-atom alloys (SAAs), or alternatively single metal atoms coordinated to oxygen atoms on an oxide support. We present the synthesis of a new type of Co1Cu SAC centers on a Cu2O(111) support by means of a site-selective atomic layer deposition technique. Isolated metallic Co atoms selectively coordinate to the native oxygen vacancy sites (Cu sites) of the reconstructed Cu2O(111) surface, forming a Co1Cu SAA with no direct Co-Oxbonds. The centers, here referred to as Co1Cu hybrid SACs, are found to stabilize the active Cu+sites of the... (More)

Single-atom catalysts (SACs) consist of a low coverage of isolated metal atoms dispersed on a metal substrate, called single-atom alloys (SAAs), or alternatively single metal atoms coordinated to oxygen atoms on an oxide support. We present the synthesis of a new type of Co1Cu SAC centers on a Cu2O(111) support by means of a site-selective atomic layer deposition technique. Isolated metallic Co atoms selectively coordinate to the native oxygen vacancy sites (Cu sites) of the reconstructed Cu2O(111) surface, forming a Co1Cu SAA with no direct Co-Oxbonds. The centers, here referred to as Co1Cu hybrid SACs, are found to stabilize the active Cu+sites of the low-cost Cu2O catalyst that otherwise is prone to deactivation under reaction conditions. The stability of the Cu2O(111) surface was investigated by synchrotron radiation-based ambient-pressure X-ray photoelectron spectroscopy under reducing CO environment. The structure and reduction reaction are modeled by density functional theory calculations, in good agreement with experimental results.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemistry of Materials
volume
34
issue
5
pages
8 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85124525958
ISSN
0897-4756
DOI
10.1021/acs.chemmater.1c04137
language
English
LU publication?
yes
id
d4fcfaea-8c66-4a14-af82-3fc9783c3e3b
date added to LUP
2022-05-20 14:55:54
date last changed
2022-05-20 14:55:54
@article{d4fcfaea-8c66-4a14-af82-3fc9783c3e3b,
  abstract     = {{<p>Single-atom catalysts (SACs) consist of a low coverage of isolated metal atoms dispersed on a metal substrate, called single-atom alloys (SAAs), or alternatively single metal atoms coordinated to oxygen atoms on an oxide support. We present the synthesis of a new type of Co<sub>1</sub>Cu SAC centers on a Cu<sub>2</sub>O(111) support by means of a site-selective atomic layer deposition technique. Isolated metallic Co atoms selectively coordinate to the native oxygen vacancy sites (Cu sites) of the reconstructed Cu<sub>2</sub>O(111) surface, forming a Co<sub>1</sub>Cu SAA with no direct Co-O<sub>x</sub>bonds. The centers, here referred to as Co<sub>1</sub>Cu hybrid SACs, are found to stabilize the active Cu<sup>+</sup>sites of the low-cost Cu<sub>2</sub>O catalyst that otherwise is prone to deactivation under reaction conditions. The stability of the Cu<sub>2</sub>O(111) surface was investigated by synchrotron radiation-based ambient-pressure X-ray photoelectron spectroscopy under reducing CO environment. The structure and reduction reaction are modeled by density functional theory calculations, in good agreement with experimental results.</p>}},
  author       = {{Wang, Chunlei and Kong, Yuan and Soldemo, Markus and Wu, Zongfang and Tissot, Héloise and Karagoz, Burcu and Marks, Kess and Stenlid, Joakim Halldin and Shavorskiy, Andrey and Kokkonen, Esko and Kaya, Sarp and Stacchiola, Dario J. and Weissenrieder, Jonas}},
  issn         = {{0897-4756}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{5}},
  pages        = {{2313--2320}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Chemistry of Materials}},
  title        = {{Stabilization of Cu<sub>2</sub>O through Site-Selective Formation of a Co<sub>1</sub>Cu Hybrid Single-Atom Catalyst}},
  url          = {{http://dx.doi.org/10.1021/acs.chemmater.1c04137}},
  doi          = {{10.1021/acs.chemmater.1c04137}},
  volume       = {{34}},
  year         = {{2022}},
}