期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 5, 页码 2288-2296出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta08987a
关键词
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资金
- Program for New Century Excellent Talents in University of the Ministry of Education of China [NCET-13-0846]
- National Natural Science Foundation of China [21101089]
- Inner Mongolia Natural Science Foundation [2011JQ01]
- Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region [NJYT-13-A01]
A series of non-precious monometallic (Co, Ni and Fe) and bimetallic (CuCo, FeCo, NiCo, CuNi and FeNi) nanoparticles (NPs) supported by semiconductor graphitic carbon nitride (g-C3N4) was synthesized, which was used to catalyze hydrogen evolution from ammonia borane (NH3BH3) under visible light irradiation at 298 K. The systematic investigation showed that in comparison with the activities of all the catalysts in the dark, their activities were remarkably enhanced under visible light irradiation. Particularly, the in situ-synthesized Co, FeCo and CuCo catalysts exhibited visible-light-driven activities featuring total turnover frequency (TOF) values of 55.6, 68.2 and 75.1 min(-1), respectively, which were the highest amongst the values of the reported noble-metal-free catalysts at 298 K. The enhancement of activities could be ascribed to the enrichment of the electron density of the active metal NPs under visible light irradiation, which was caused by the Mott-Schottky effect at the g-C3N4-metal interface. Furthermore, the catalytic activities of the catalysts strongly depended on the wavelength and intensity of the incident light, indicating that the visible light irradiation indeed played a key role in the enhancement of catalytic activities.
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