期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 20, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202111501
关键词
2D graphdiyne; large current density hydrogen evolution; single-crystal Pd quantum dots
类别
资金
- National Nature Science Foundation of China [21790050, 21790051, 22021002]
- National Key Research and Development Project of China [2018YFA0703501]
- Key Program of the Chinese Academy of Sciences [QYZDY-SSW-SLH015]
The key issue for industrial large-scale hydrogen production by water electrolysis is to develop environmentally friendly electrocatalysts. This study successfully achieved the highly selective, in situ growth of single-crystal Pd (111) quantum dots on 2D graphdiyne (GDY) as a support material, demonstrating the advantages of high current density and long-term stability at small overpotentials. The results show that 2D GDY is an ideal support for the controllable synthesis of metal quantum dots.
The key issue for industrial large-scale hydrogen production by water electrolysis is developing environment-friendly electrocatalysts that can work well at large current densities and low overpotentials. Thanks to the superior advantages of 2D graphdiyne (GDY) on chemical structure and the alkyne bond strong reductivity, the highly selective, in situ growth of the single-crystal Pd (111) quantum dots is achieved. The metal dots distribute uniformly and densely on the GDY surface (GDY-Pd1) in a controllable way at low temperatures without adding additional reductive agents. Experimental and theoretical results show that the 2D GDY affords an ideal platform to construct highly selective and active electrocatalysts with accurate structures, defined valence states, facilitated charge transfer ability, and enhanced electric conductivity for hydrogen evolution reaction. Remarkably, the electrocatalyst can reach 500 and 1000 mA cm(-2) at small overpotentials of only 201 and 261 mV, with high long-term stability, which are better than most of the reported ones. The results demonstrate that 2D DGY is an excellent support in the controllable synthesis of metal quantum dots with well-defined surface and structure and the potential to achieve large-scale preparation. This study takes a critical step toward industrial hydrogen production.
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