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Silver Single Atom in Carbon Nitride Catalyst for Highly Efficient Photocatalytic Hydrogen Evolution |
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| Authors: | Xun-Heng Jiang Dr. Long-Shuai Zhang Hai-Yan Liu Prof. Dai-She Wu Fei-Yao Wu Lei Tian Ling-Ling Liu Prof. Jian-Ping Zou Prof. Sheng-Lian Luo Bing-Bing Chen |
| Affiliation: | 1. Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi, 330063 P. R. China Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, Nanchang, Jiangxi, 330031 P. R. China These authors contributed equally to this work.;2. Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi, 330063 P. R. China These authors contributed equally to this work.;3. Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi, 330063 P. R. China;4. Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, Nanchang, Jiangxi, 330031 P. R. China;5. Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi, 330063 P. R. China Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources Environmental and Chemical Engineering, Nanchang University, Nanchang, Jiangxi, 330031 P. R. China;6. Department of Energy Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu, 210009 P. R. China |
| Abstract: | Single atom catalysts (SACs) with the maximized metal atom efficiency have sparked great attention. However, it is challenging to obtain SACs with high metal loading, high catalytic activity, and good stability. Herein, we demonstrate a new strategy to develop a highly active and stable Ag single atom in carbon nitride (Ag-N2C2/CN) catalyst with a unique coordination. The Ag atomic dispersion and Ag-N2C2 configuration have been identified by aberration-correction high-angle-annular-dark-field scanning transmission electron microscopy (AC-HAADF-STEM) and extended X-ray absorption. Experiments and DFT calculations further verify that Ag-N2C2 can reduce the H2 evolution barrier, expand the light absorption range, and improve the charge transfer of CN. As a result, the Ag-N2C2/CN catalyst exhibits much better H2 evolution activity than the N-coordinated Ag single atom in CN (Ag-N4/CN), and is even superior to the Pt nanoparticle-loaded CN (PtNP/CN). This work provides a new idea for the design and synthesis of SACs with novel configurations and excellent catalytic activity and durability. |
| Keywords: | co-coordination electron transfer photocatalysis single-atom catalyst |