电催化剂
材料科学
氢
无机化学
化学
化学工程
电化学
纳米技术
物理化学
电极
工程类
有机化学
作者
Roussin Lontio Fomekong,Sana Akir,Filipa M. Oliveira,Jan Luxa,Levna Chacko,Jakub Regner,Lukáš Děkanovský,Eva Vejmelková,Zdeněk Sofer
标识
DOI:10.1016/j.jpowsour.2024.234293
摘要
Efficient electrocatalysts for the hydrogen evolution reaction (HER) in alkaline electrolytes can ensure both durability and safety in electrolysis devices. The synergistic integration of metal-organic frameworks and two-dimensional materials holds promise for advancing electrocatalytic performance. Herein, we hybridized V2C MXene and the cobalt-based imidazolate zeolitic framework (ZIF-67) by an in-situ precipitation method and investigated its electrocatalytic properties for HER in 1 M KOH solution. Characterization unveiled the successful intercalation of ZIF-67 within the layers of V2C MXene nanosheets. The resulting V2C/ZIF-67 hybrid achieves a good current density of 10 mAcm−2 at a modest overpotential of 197 mV vs RHE and a Tafel slope of 76 mVdec−1. Significantly, the hybrid material shows excellent stability with a minor overpotential loss of 5.5 mV, whereas the Pt/C-20% exhibits a more pronounced loss of 15.3 mV after 12 h of chronopotentiometry. Capitalizing on ZIF-67's substantial active surface and exceptional electrical conductivity of V2C MXene, hybrid material enables the fast transfer of charges and ions across the interface, culminating in its superior electrocatalytic prowess.
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