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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202106781
|2 doi
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|a pubmed24n1105.xml
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|a (DE-627)NLM33164682X
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|a (NLM)34623713
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|a DE-627
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|a eng
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|a Geng, Bo
|e verfasserin
|4 aut
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|a Conductive CuCo-Based Bimetal Organic Framework for Efficient Hydrogen Evolution
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 20.05.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Wiley-VCH GmbH.
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|a Metal-organic frameworks (MOFs) with intrinsically porous structures and well-dispersed metal sites are promising candidates for electrocatalysis; however, the catalytic efficiencies of most MOFs are significantly limited by their impertinent adsorption/desorption energy of intermediates formed during electrocatalysis and very low electrical conductivity. Herein, Co is introduced into conductive Cu-catecholate (Cu-CAT) nanorod arrays directly grown on a flexible carbon cloth for hydrogen evolution reaction (HER). Electrochemical results show that the Co-incorporated Cu-CAT nanorod arrays only need 52 and 143 mV overpotentials to drive a current density of 10 mA cm-2 in alkaline and neutral media for HER, respectively, much lower than most of the reported non-noble metal-based electrocatalysts and comparable to the benchmark Pt/C electrocatalyst. Density functional theory calculations show that the introduction of Co can optimize the adsorption energy of hydrogen (ΔGH* ) of Cu sites, almost close to that of Pt (111). Furthermore, the adsorption energy of water ( Δ E H 2 O ) of Co sites in the CuCo-CAT is significantly lower than that of Cu sites upon coupling Cu with Co, effectively accelerating the Volmer step in the HER process. The findings, synergistic effect of bimetals, open a new avenue for the rational design of highly efficient MOF-based electrocatalysts
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|a Journal Article
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|a conductive metal-organic frameworks
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|a density functional theory calculation
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|a doping
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|a hydrogen evolution reaction
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|a self-supported electrode
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|a Yan, Feng
|e verfasserin
|4 aut
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|a Zhang, Xiao
|e verfasserin
|4 aut
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|a He, Yuqian
|e verfasserin
|4 aut
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|a Zhu, Chunling
|e verfasserin
|4 aut
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|a Chou, Shu-Lei
|e verfasserin
|4 aut
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|a Zhang, Xiaoli
|e verfasserin
|4 aut
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|a Chen, Yujin
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 33(2021), 49 vom: 01. Dez., Seite e2106781
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:33
|g year:2021
|g number:49
|g day:01
|g month:12
|g pages:e2106781
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|u http://dx.doi.org/10.1002/adma.202106781
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