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Issue 44, 2018
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Solid-phase hot-pressing synthesis of POMOFs on carbon cloth and derived phosphides for all pH value hydrogen evolution

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Abstract

Designing an all pH value hydrogen evolution reaction (HER) electrocatalyst with low cost and high activity is urgently needed for future energy storage and conversion systems. Metal–organic frameworks (MOFs) with well-defined pore structures and various metal sources provide feasible platforms for the design of efficient electrocatalysts. However, MOFs as crystalline materials are mostly in crystal or powder form, which would hinder their practical application. Herein, polyoxometalate-based MOFs (POMOFs) were synthesized on carbon cloth (CC) through a facile and general solid-phase hot-pressing method for the first time. The thus-obtained POMOFs/CC can be converted into three phase bimetallic phosphides coated with porous carbon on CC through a phosphidation process, show high electrocatalytic stability over a wide pH range (pH, 0–14) and possess excellent HER performance with low overpotential (e.g., 90.5 mV at 10 mA cm−2 in 1 M KOH). Moreover, the POMOFs/CC derived phosphides present high selectivity for H2 production (nearly 100% faradaic efficiency) and ultra-low charge-transfer resistance (0.96 Ω) in alkaline medium, which hold promise for practical applications. This work provides a powerful strategy for the facile production of fast nucleating MOF-derived electrodes with potential for industrial-scale application in energy storage and conversion.

Graphical abstract: Solid-phase hot-pressing synthesis of POMOFs on carbon cloth and derived phosphides for all pH value hydrogen evolution

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Publication details

The article was received on 09 Mar 2018, accepted on 05 Apr 2018 and first published on 07 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA02219D
Citation: J. Mater. Chem. A, 2018,6, 21969-21977
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    Solid-phase hot-pressing synthesis of POMOFs on carbon cloth and derived phosphides for all pH value hydrogen evolution

    Y. Tang, Y. Chen, H. Zhu, A.-Man Zhang, X. Wang, L. Dong, S. Li, Q. Xu and Y. Lan, J. Mater. Chem. A, 2018, 6, 21969
    DOI: 10.1039/C8TA02219D

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