journal article·2022-02-23Open access

Activating Surface Lattice Oxygen of a Cu/Zn1–xCuxO Catalyst through Interface Interactions for CO Oxidation

Minli Zeng, Xiyang Wang, Qilei Yang, Xuefeng Chu, Zuolong Chen, Zhen Li, Carl Redshaw, Chao Wang, Yue Peng, Nannan Wang, Yanqiu Zhu, Yimin A. Wu

Abstract

Surface lattice oxygen in metal oxides is a common participant in many chemical reactions. Given this, the structural design of catalysts to activate lattice oxygen and moreover investigations into the effect of lattice oxygen on reaction pathways are hot topics. With this in mind, herein we prepare CuO–Zn1–xCuxO (ZCO) nanofibers akin to the Trojan horse legend and via an in situ reduction obtain activated Cu/Zn1–xCuxO (Cu/ZCO) nanofibers. X-ray absorption spectroscopy and X-ray photoelectron spectroscopy reveal that surface lattice oxygen of Cu/ZCO is effectively activated from inert O2– to reactive O2–x. This activation stems from the enhanced covalence of metal–oxygen bonds and the electron transfer between Cu and the support. Online mass spectrometry reveals that Cu/ZCO with activated lattice oxygen exhibits a higher Mars–van Krevelen reaction efficiency during the CO oxidation process. This study offers a new avenue to engineer interface interactions, given, as highlighted here, the importance of surface lattice oxygen in oxide supports during the catalytic process.
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Research context

OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions · Copper-based nanomaterials and applications

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

Affiliations

Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, P. R. China

Department of Mechanical and Mechatronics Engineering, Waterloo Institute for Nanotechnology, Materials Interface Foundry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada

School of Environment, Tsinghua University, Beijing 100084, P. R. China

Key Laboratory of Architectural Cold Climate Energy Management, Ministry of Education, Jilin Jianzhu University, Changchun 130118, P. R. China

Plastics Collaboratory, Department of Chemistry, University of Hull, Hull HU6 7RX, U.K.

Funding

Natural Science Foundation of Guangxi Province · Natural Sciences and Engineering Research Council of Canada · National Natural Science Foundation of China · Hefei Science Center, Chinese Academy of Sciences

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