Unraveling the Mechanism of Cu/CeO 2 Interface Modulation for CO 2 Electroreduction Into C 2+ /CH 4
Source abstract
Abstract
Abstract Cu shows unique characteristics for electrochemical CO 2 reduction reaction (CO 2 RR) to hydrocarbons and oxygenates due to the moderate adsorption energy of the key intermediate *CO. However, it remains a challenge to selectively control CO 2 RR towards C 1 (e.g., CH 4 ) or C 2+ (e.g., C 2 H 4 and C 2 H 5 OH) through simple interface engineering. Herein, a series of inverse catalysts, composed of CeO 2 nanoparticles over Cu substrate (Cu‐CeO 2 ‐x), are subtly designed to tackle the issues. It is verified CeO 2 decoration induces highly active Cu/CeO 2 interfacial sites that enhance the adsorption and conversion of CO 2 and *CO intermediates into C 2+ or CH 4 , while the Cu sites are conducive to *CO generation. With the increase of CeO 2 deposition, the C 2+ and CH 4 selectivity present a volcano‐type and increasing tendency with maximum faradic efficiency of 62.6% and 51.3%, respectively. In‐situ infrared spectroscopy and theoretical calculations reveal that moderate CeO 2 loading allows the Cu/CeO 2 interfacial sites to cooperate efficiently with the Cu sites to promote the coupling of *CO/*CHO intermediates, thus enhancing the C 2+ selectivity. In contrast, excessive CeO 2 loading suppresses the C─C coupling but boosts unilaterally the hydrogenation, thus promoting the CH 4 production. This work provides effective strategies to regulate the CO 2 RR selectivity by modulating metal/oxide interfaces.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ammonia Synthesis and Nitrogen Reduction · Ionic liquids properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China
State Key Laboratory of Industrial Vent Gas Reuse Southwest Institute of Chemical Co., Ltd Chengdu 610225 China
College of Chemistry Sichuan University Chengdu 610040 China
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Centre for Computational Chemistry and Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China
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