journal article·2022-03-08Open access

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

Chemistry of Materials· Volume 34· Issue 5

Abstract

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

OpenAlex topics: Catalytic Processes in Materials Science · Electrocatalysts for Energy Conversion · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Materials and Nano Physics, School of Engineering Sciences, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden

Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics & CAS Center for Excellence in Nanoscience and Department of Chemical Physics & Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230026 Anhui, China

CINaM, UMR 7325, Aix-Marseille Univ., CNRS, F-13288 Marseille, France

Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, 11973 New York, United States

SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, 94025 California, United States

Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, 94305 California, United States

MAX IV Laboratory, Lund University, P.O. Box 118, 221 00 Lund, Sweden

Koç University Tüpraş Energy Center (KUTEM), Department of Chemistry, Koç University, 34450 Istanbul, Turkey

Funding

Vetenskapsr?det · Knut och Alice Wallenbergs Stiftelse · Carl Tryggers Stiftelse f?r Vetenskaplig Forskning · Swedish Foundation for International Cooperation in Research and Higher Education · National Science and Technology Major Project · Ragnar Holm Foundation

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