1. Uniformly bimetal-decorated holey carbon nanorods derived from metal−organic framework for efficient hydrogen evolution.
- Author
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Chen, Li-Feng, Hou, Chun-Chao, Zou, Lianli, Kitta, Mitsunori, and Xu, Qiang
- Subjects
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HYDROGEN evolution reactions , *METAL-organic frameworks , *NANORODS , *DISTRIBUTION (Probability theory) , *CLEAN energy , *AQUEOUS solutions - Abstract
Molybdate-coordinated zeolitic imidazolate framework (ZIF-67/MoO 4 2−) holey nanorods transformed from CoMoO 4 are rationally designed as a pyrolysis precursor to prepare the cobalt/ β -Mo 2 C nanoparticles uniformly decorated nitrogen-doped carbon (N-C/Co/Mo 2 C) holey nanorods. This strategy enables the resultant material to attain a high compositional uniformity, exhibiting excellent electrocatalytic activities for HER in 1.0 mol L−1 KOH aqueous solution. The hydrogen evolution reaction (HER) as a fundamental process in electrocatalysis plays a significant role in clean energy technologies. For an energy-efficient HER, it demands an effective, durable, and low-cost catalyst to trigger proton reduction with minimal overpotential and fast kinetics. Here, we successfully fabricate a highly efficient HER catalyst of N-C/Co/Mo 2 C holey nanorods with Co/ β -Mo 2 C nanoparticles uniformly embedded in nitrogen-doped carbon (N-C/Co/Mo 2 C) by pyrolyzing the molybdate-coordinated zeolitic imidazolate framework (ZIF-67/MoO 4 2−) holey nanorods, which result from the reaction between CoMoO 4 and MeIM in a methanol/water/triethylamine mixed solution. The uniform distribution of MoO 4 2− in the ZIF-67/MoO 4 2− enables Co/ β- Mo 2 C nanoparticles to be well-distributed within nitrogen-doped carbon holey nanorods. This synthetic strategy endows the N-C/Co/Mo 2 C catalyst with uniformly decorated bimetal, thus attaining excellent HER electrocatalytic activities with a small overpotential of 142.0 mV at 10 mA cm−2 and superior stability in 1.0 mol L−1 KOH aqueous solution. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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