Facet-Mediated Interfacial Zn–O v –Ce Sites for Enhanced CO 2 Electroreduction
Source abstract
Abstract
High-dispersion Zn-based catalysts are promising candidates to replace noble-metal catalysts for the electrochemical CO 2 reduction reaction (CO 2 RR). However, it is still challenging to identify and stabilize active Zn species to achieve high activity and selectivity. Herein, the Zn species are anchored on different crystal facets of CeO 2, and the interaction between Zn atoms and specific facets of CeO 2 for the CO 2 RR is investigated. The Zn/CeO 2 (110) catalyst, with CeO 2 nanorods exposing the (110) facet, exhibits a high Faradaic efficiency (FE) of 75.6% for CO production at −1.4 V vs RHE, which is 1.3 and 1.6 times higher than that of Zn/CeO 2 (100) and Zn/CeO 2 (111), respectively. The CO partial current density of Zn/CeO 2 (110) achieves 3.89 mA·cm –2 at −1.4 V vs RHE, superior to the other counterparts. Detailed characterizations reveal that the strong interactions between the CeO 2 (110) facet and Zn atoms induce the generation of more oxygen vacancies. The asymmetric Zn–O v –Ce sites facilitate the stabilization of Zn species with a small particle size. Moreover, the interfacial Zn–O v –Ce sites and oxygen vacancies significantly promote CO 2 activation, thereby favoring subsequent *COOH formation and CO production. This study opens a new avenue to design efficient metal oxide catalysts by engineering specific facets and interfacial active sites.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ammonia Synthesis and Nitrogen Reduction · Catalysts for Methane Reforming
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Clean Energy Chemistry, College of Chemistry
Liaoning University
State Key Laboratory of Catalysis
Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Institute of Science and Technology for New Energy
Xi’an Technological University
Centre for Atomaterials and Nanomanufacturing (CAN), School of Science
RMIT University
ARC Industrial Transformation Research Hub for Intelligent Energy Efficiency in Future Protected Cropping (E2Crop)
Funding
Australian Research Council · Australian Government · Australian Renewable Energy Agency · National Natural Science Foundation of China · European Commission's Australia-Spain Network for Innovation and Research Excellence
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