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

Chunlei Wang, Yuan Kong, Markus Soldemo, Zongfang Wu, Héloise Tissot, Burcu Karagoz, Kess Marks, Joakim Halldin Stenlid, Andrey Shavorskiy, Esko Kokkonen, Sarp Kaya, Dario J. Stacchiola, Jonas Weissenrieder

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)2313-2320
Number of pages8
JournalChemistry of Materials
Issue number5
Publication statusPublished - 2022 Mar 8

Subject classification (UKÄ)

  • Materials Chemistry


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