期刊
SMALL
卷 17, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202006442
关键词
carbon nanotubes; carbon support; catalysts; graphdiyne; metal clusters
类别
资金
- National Natural Science Foundation of China [201972123, U1703251, 21861037]
- Program for Tianshan Innovative Research Team of Xinjiang Uygur Autonomous Region [2018D14002]
- Open Fund of the Key Laboratory of Xinjiang Uygur Autonomous Region [2017D040414]
- Scientific Research Program of the Higher Education Institution of Xinjiang [XJEDU2017A001]
The carbon-supported metal nanocatalysts with well-designed graphdiyne layer decorated on the carbon nanotubes sidewalls exhibited excellent catalytic activity for efficient hydrogen generation and aromatic nitroreduction. The novel carbon support possessed excellent conductivity, abundant and uniform reactive sites, low redox potential, high specific surface area, and strong interaction with metal atomic clusters, making it a promising candidate for other metal-supported catalysts.
Carbon-supported metal nanocatalysts have received substantial attention for heterogeneous catalysis in industry. Hunting for suitable and impactful carbon supports that have strong interactions with metal nanocatalyst is a matter of great urgency. Herein, a well-designed graphdiyne layer decorated on the carbon nanotubes sidewalls (CNT@GDY) serves as a novel carbon support. This unique hybrid structure effectively traps platinum and palladium atomic clusters (Pt/Pd-ACs) with dimensions of 0.65 nm and 1.05 nm uniformly and firmly, forming novel carbon-supported metal nanocatalysts (Pt(Pd)-ACs/CNT @ GDY) for efficient hydrogen generation and aromatic nitroreduction, respectively. The Pt-ACs/CNT@GDY can deliver an HER current density of 10 mA cm(-2) with a small overpotential of 23 mV in 0.5 M H2SO4, showing a greatly enhanced mass activity, intrinsic activity than the commercial Pt/C catalyst. The Pd-ACs/CNT@GDY also exhibits excellent catalytic activity and a high turnover frequency of 38.0 min(-1) for aromatic nitroreduction. The carbon support turns out to possess excellent conductivity, abundant and uniform reactive sites, low redox potential, more negative surface and large specific surface area as well as a strong interaction with ACs, as anticipated in ideal supports, which can be applied in other metal-supported catalysts.
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