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

Tang, YJ (Tang, Yu-Jia)[ 1 ] ; Chen, YF (Chen, Yifa)[ 1 ] ; Zhu, HJ (Zhu, Hong-Jing)[ 1 ] ; Zhang, AM (Zhang, A. -Man)[ 1 ] ; Wang, XL (Wang, Xiao-Li)[ 1 ] ; Dong, LZ (Dong, Long-Zhang)[ 1 ] ; Li, SL (Li, Shun-Li)[ 1 ] ; Xu, Q (Xu, Qiang)[ 2 ]* ; Lan, YQ (Lan, Ya-Qian)[ 1 ]*（兰亚乾）

[ 1 ] Nanjing Normal Univ, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Sch Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China

[ 2 ] Natl Inst Adv Ind Sci & Technol, Res Inst Elect Energy, Ikeda, Osaka 5638577, Japan

JOURNAL OF MATERIALS CHEMISTRY A，201811,6(44),21969-21977

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 H-2 production (nearly 100% faradaic efficiency) and ultra-low charge-transfer resistance (0.96 Omega) 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.

文章链接：

https://pubs.rsc.org/en/Content/ArticleLanding/2018/TA/C8TA02219D#!divAbstract

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