Volume 133, Issue 11 pp. 6189-6194
Forschungsartikel

Photocatalyst for High-Performance H2 Production: Ga-Doped Polymeric Carbon Nitride

Wenshuai Jiang

Wenshuai Jiang

Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124 P. R. China

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Yajie Zhao

Yajie Zhao

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Department, Soochow University, 199 Ren'ai Road, Suzhou, 215123 Jiangsu, P. R. China

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Dr. Xupeng Zong

Dr. Xupeng Zong

Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124 P. R. China

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Haodong Nie

Haodong Nie

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Department, Soochow University, 199 Ren'ai Road, Suzhou, 215123 Jiangsu, P. R. China

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Lijuan Niu

Lijuan Niu

Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124 P. R. China

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Prof. Li An

Prof. Li An

Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124 P. R. China

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Prof. Dan Qu

Corresponding Author

Prof. Dan Qu

Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124 P. R. China

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Prof. Xiayan Wang

Prof. Xiayan Wang

Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124 P. R. China

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Prof. Zhenhui Kang

Corresponding Author

Prof. Zhenhui Kang

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Department, Soochow University, 199 Ren'ai Road, Suzhou, 215123 Jiangsu, P. R. China

Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, 999078 Macau SAR, P. R. China

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Prof. Zaicheng Sun

Corresponding Author

Prof. Zaicheng Sun

Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Biology, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124 P. R. China

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First published: 20 January 2021
Citations: 21

Abstract

A photocatalyst system is generally comprises a catalyst and cocatalyst to achieve light absorption, electron-hole separation, and surface reaction. It is a challenge to develop a single photocatalyst having all functions so as to lower the efficiency loss. Herein, the active GaN4 site is integrated into a polymeric carbon nitride (CN) photocatalyst (GCN), which displays an excellent H2 production rate of 9904 μmol h−1 g−1. It is 162 and 3.3 times higher than that of CN with the absence (61 μmol h−1 g−1) and presence (2981 μmol h−1 g−1), respectively, of 1.0 wt % Pt. Under light irradiation the electron is injected and stored at the GaN4 site, where the LUMO locates. The HOMO distributes on the aromatic ring resulting in spatial charge separation. Transient photovoltage discloses the electron-storage capability of GCN. The negative GaN4 promotes proton adsorption in the excited state. The positive adsorption energy drives H2 desorption from GaN4 after passing the electron to the proton. This work opens up opportunities for exploring a novel catalyst for H2 production.

Conflict of interest

The authors declare no conflict of interest.

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