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Design of Electrocatalytic Janus WSeS/WSe2 Heterostructure Nanowall Electrodes with High Selectivity and Faradaic Efficiency for Nitrogen Reduction

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Advanced Energy materials 2023年第46期13卷

作者： Peng, Yu-Ren Tang, Shin-Yi Yang, Tzi-Yi Sino, Paul Albert Chen, Yuan-Chun Chaudhary, Mayur Chen, Chieh-Ting Cyu, Ruei-Hong Chung, Chia-Chen Gu, Bing-Ni Liu, Ming-Jing Hsu, Che-Hao Huang, Hung-Yi Lee, Ling Wu, Shu-Chi Jen, Yu-Yi Cheng, You-Song Hu, Chi-Chang Miao, Wen-Chien Kuo, Hao-Chung Chueh, Yu-Lun Department of Materials Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan Ph. D. Program in Prospective Functional Materials Industry National Tsing Hua University Hsinchu30013 Taiwan College of Semiconductor Research National Tsing-Hua University Hsinchu30013 Taiwan Department of Physics National Sun Yat-Sen University Kaohsiung80424 Taiwan Center for Nanotechnology Materials Science and Microsystem National Tsing-Hua University Hsinchu30013 Taiwan Semiconductor Research Center Hon Hai Research Institute Taipei11492 Taiwan Department of Chemical Engineering National Tsing Hua University Hsinchu30013 Taiwan Instrument Center National Tsing Hua University Hsinchu30013 Taiwan Instrumentation Resource Center National Yang Ming Chiao Tung University Taiwan Department of Photonics National Yang Ming Chiao Tung University Hsinchu30010 Taiwan

The electrochemical nitrogen reduction reaction (NRR) is an attractive process for next-generation ammonia synthesis;therefore, identifying a suitable catalyst for this reaction is critical. In recent years, transition-metal dichalcogenides (TMDs) and their Janus structures have gained significant attention because of their outstanding catalytic properties. However, the synthesis of Janus TMDs remains challenging, and exposing their active sites is difficult when using a low-dimensional structure to improve the catalytic activity. To date, relatively little research has been conducted in this area. Herein, emerging Janus WSeS/WSe2 heterostructure nanowalls are systematically explored. These nanowalls are used as a nitrogen fixation catalyst in electrolytes. The nanowalls demonstrate a significant NH3 yield rate and Faradaic efficiency of 13.97 µg h-mgcat−1 and 35.24% at −0.3 V in 0.1 m HCl, as well as 15.96 µg h-mgcat−1 and 40.2% in 0.1 M Na2SO4. This study presents an in-depth analysis of the properties of Janus WSeS/WSe2 heterostructure nanowalls and a conceptual framework for linking TMD-based catalysts and the NRR. © 2023 Wiley-VCH GmbH.

关键词： Ammonia

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