期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 142, 期 7, 页码 3645-3651出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c00218
关键词
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资金
- National Key Research and Development Program of China [2016YFA0200400]
- National Natural Science Foundation of China [51872116, 51571100]
- Program for JLU Science and Technology Innovative Research Team (JLUS-TIRT) [2017TD-09]
- Fundamental Research Funds for the Central Universities
- Department of Energy, Office of Science, Materials Sciences and Engineering Division [DE-SC0015114]
- U.S. Department of Energy (DOE) [DE-SC0015114] Funding Source: U.S. Department of Energy (DOE)
The design of catalysts with high activity and robust stability for alkaline hydrogen evolution reaction (HER) remains a great challenge. Here, we report an efficient catalyst of two-dimensional bimetallene hydrides, in which H atoms stabilize the rhodium palladium bimetallene. The system exists because of the introduction of H that is in situ chemically released from the formaldehyde solution during the synthesis. This provides a highly stable catalyst based on an unstable combination of metal elements. Density functional theory calculations show the H is confined by electronic interactions and the Miedema rule of reverse stability of the RhPd alloy. The obtained catalyst exhibits outstanding alkaline HER catalytic performance with a low overpotential of 40 mV at 10 mA cm(-2) and remarkable stability for over 10 h at 100 mA cm(-2). The experimental results show that the confined H improve the activity, while the ultrathin sheet-like morphology yields stability. Our work provides guidance for synthesizing high-activity catalysts by confining heteroatoms into the crystal lattice of bimetallene and also a very novel mechanism for the growth of bimetallene made of highly immiscible components.
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