Metallic Co2C: A Promising Co-catalyst To Boost Photocatalytic Hydrogen Evolution of Colloidal Quantum Dots

被引:81
作者
Guo, Qing [1 ,3 ]
Liang, Fei [2 ,3 ]
Gao, Xiao-Ya [1 ,3 ]
Gan, Qi-Chao [1 ,3 ]
Li, Xu-Bing [1 ,3 ]
Li, Jian [1 ,3 ]
Lin, Zhe-Shuai [2 ,3 ]
Tung, Chen-Ho [1 ,3 ]
Wu, Li-Zhu [1 ,3 ]
机构
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Funct Crystals & Laser Technol, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
transition-metal carbide; metallic Co2C; photocatalytic H-2 evolution; DFT calculations; FISCHER-TROPSCH SYNTHESIS; SEMICONDUCTOR NANOCRYSTALS; CARBIDE NANOPARTICLES; H-2; GENERATION; EFFICIENT; ELECTROCATALYST; CATALYSTS; CDS; NANOWIRE; MOS2;
D O I
10.1021/acscatal.8b01105
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Transition-metal carbide (TMC), because of its electronic conductivity, chemical stability, and physical properties, has aroused widespread interest in catalysis. Here, we have systematically studied the photocatalytic hydrogen (H-2) evolution of metallic cobalt carbide (Co2C) by a combination of theoretical and experimental investigations. In terms of intrinsic proton reduction property of the Co2C (020) facet and facile interficial electron transfer, the assembled architecture of quantum dots (QDs)/Co2C can give a rate of similar to 18 000 mu mol g(-1)h(-1) (lambda = 450 nm), using TMC as co-catalysts and an apparent quantum yield of similar to 2.7% of photocatalytic H-2 evolution, an, similar to 10-fold enhancement, compared with bare QDs under identical conditions. Our results indicate that Co2C with suitable morphology and facet exposure can work as a co catalyst to achieve photocatalytic H-2 evolution.
引用
收藏
页码:5890 / +
页数:11
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