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MXene-Regulated Metal-Oxide Interfaces with Modified Intermediate Configurations Realizing Nearly 100% CO2 Electrocatalytic Conversion |
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| Authors: | Yanan Hao Prof Feng Hu Shangqian Zhu Yajie Sun Hui Wang Luqi Wang Ying Wang Prof Jianjun Xue Dr Yen-Fa Liao Prof Minhua Shao Prof Shengjie Peng |
| Institution: | 1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016 China
These authors contributed equally to this work.;2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016 China;3. Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, 999077 Kowloon, Hong Kong, China These authors contributed equally to this work.;4. National Synchrotron Radiation Research Center, Hsinchu, 300 Taiwan;5. Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, 999077 Kowloon, Hong Kong, China |
| Abstract: | Electrocatalytic CO2 reduction via renewable electricity provides a sustainable way to produce valued chemicals, while it suffers from low activity and selectivity. Herein, we constructed a novel catalyst with unique Ti3C2Tx MXene-regulated Ag?ZnO interfaces, undercoordinated surface sites, as well as mesoporous nanostructures. The designed Ag?ZnO/Ti3C2Tx catalyst achieves an outstanding CO2 conversion performance of a nearly 100% CO Faraday efficiency with high partial current density of 22.59 mA cm?2 at ?0.87 V versus reversible hydrogen electrode. The electronic donation of Ag and up-shifted d-band center relative to Fermi level within MXene-regulated Ag?ZnO interfaces contributes the high selectivity of CO. The CO2 conversion is highly correlated with the dominated linear-bonded CO intermediate confirmed by in situ infrared spectroscopy. This work enlightens the rational design of unique metal-oxide interfaces with the regulation of MXene for high-performance electrocatalysis beyond CO2 reduction. |
| Keywords: | CO2 Electroreduction Intermediate Configuration MXene Metal-Oxide Interface in Situ ATR-IR Spectroscopy |