Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 200, Issue -, Pages 477-483Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2016.07.046
Keywords
g-C3N4; Photocatalyst; Hydrogen generation; Visible light
Funding
- National Natural Science Foundation of China [51522101, 51471075, 51401084]
- Scientific Research Foundation for Re-turned Overseas Chinese Scholars, Education of Ministry, China [3C1137282416]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110061120040]
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Photocatalytic hydrogen generation from water is an important solar-to-chemical conversion process, and is also a sustainable and environment-friendly generation approach for energy source of hydrogen. Herein, for the first time, we report the noble-metal-free CoPig-C3N4 hybrid as a photocatalyst for the highly efficient hydrogen generation by water splitting under visible light irradiation, whose hydrogen generation rate is similar to 131 times higher than that of pure g-C3N4, and is even better than that of Pt/g-C3N4. Based on the detailed analyses of photoluminescence (PL) spectra, UV-vis diffuse reflectance spectroscopy (UV-vis DRS), photocurrent-time (i-t) curves, and electrochemical impedance spectroscopy (EIS) Nyquist plots, the reason for the high efficiency of CoP/g-C3N4 is found to be its good absorption ability of visible light, highly effective separation and low recombination rate of photo-generated electron-hole pairs due to the addition of CoP to g-C3N4. (C) 2016 Elsevier B.V. All rights reserved.
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