期刊
MATERIALS ADVANCES
卷 1, 期 5, 页码 1212-1219出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ma00253d
关键词
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资金
- National Basic Research Program of China [2016YFA0202603]
- NSFC [91645104]
- Science and Technology Program of Guangzhou [201704030019]
- Natural Science Foundation of Guangdong Province [2017A010103007]
- Guangdong Science and Technology Innovation Leading Talent Fund [2016TX03N187]
- Fundamental Research Funds for the Central Universities [20lgpy84]
Here, we report the successful fabrication of highly dispersed ultrafine Ni nanoparticles (NPs) embraced into the partially carbonized Ni-MOF-74 (Ni NPs/C@Ni-MOF-74) microrod arrays by the heat treatment of the rod-like Ni-MOF-74 arrays grown on Ni foam. The partial carbonization is an effective strategy to realize the homogeneous dispersion of ultrafine Ni NPs and carbon in the skeleton of rod-like Ni-MOF-74. This can prevent the encapsulated Ni NPs and carbon from aggregation and oxidation, allowing them to serve as highly efficient electrocatalysts. The fabricated Ni NPs/C@Ni-MOF-74 not only provide high specific surface area and high conductivity, but also provide good hydrophilicity and synergetic effects among Ni NPs, carbon and Ni-MOF-74 for the adsorption and activation of H2O molecules. The HER electrocatalytic performance of Ni NPs/C@Ni-MOF-74 arrays can be optimized by the control of the carbonization time and temperature. The optimized Ni NPs/C@Ni-MOF-74/NF shows outstanding HER catalytic performance, with a low overpotential of 131 mV at 10 mA cm(-2) and excellent durability, and it is superior to most of the recently reported MOF-based HER electrocatalysts.
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