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Highly Dispersed Ultrafine Ni Particles Embedded Into MOF-74 Arrays by Partial Carbonization for Highly Efficient Hydrogen Evolution

Abstract

Here we report highly dispersed ultrafine Ni nanoaprticles (NPs) embedded in the partially carbonized Ni-MOF-74 (Ni NPs/C@Ni-MOF-74) nanorod arrays were successfully fabricated by 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, which can prevent the encapsuled Ni NPs and carbon from the aggregation and oxidation and allow 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 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 carbonization time and temperature. The optimized Ni NPs/C@Ni-MOF-74/NF shows outstanding HER catalytic performance, such as a low overpotential of 131 mV at 10 mAcm-2 and excellent durability, and it is superior to most of the recently reported MOF-based HER electrocatalysts.

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Supplementary files

Article information


Submitted
28 Apr 2020
Accepted
21 Jun 2020
First published
23 Jun 2020

This article is Open Access

Mater. Adv., 2020, Accepted Manuscript
Article type
Paper

Highly Dispersed Ultrafine Ni Particles Embedded Into MOF-74 Arrays by Partial Carbonization for Highly Efficient Hydrogen Evolution

J. Tan, J. Wu, J. Zhao, L. Xie and G. Li, Mater. Adv., 2020, Accepted Manuscript , DOI: 10.1039/D0MA00253D

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