MOF-Derived Sulfide-Based Electrocatalyst and Scaffold for Boosted Hydrogen Production

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Original languageEnglish
Pages (from-to)33595–33602
Journal / PublicationACS applied materials & interfaces
Volume12
Issue number30
Online published6 Jul 2020
Publication statusPublished - 29 Jul 2020

Abstract

Metal–organic frameworks (MOFs) can act as precursors or templates to a myriad of nanostructured materials that are difficult to prepare. In this study, Co-MOF nanorods (NRs) were prepared at room temperature followed by a calcination and hydrothermal sulfurization strategy to transform the MOF into CoS NRs on carbon cloth (CoS/CC). Intriguingly, the resultant 3D sulfide NRs can serve as scaffolds to electrodeposit layered double hydroxides (LDHs) on the surfaces. Through combining the advantages of structure and composition, the as-fabricated CoS@CoNi-LDH/CC exhibits remarkable electrocatalytic activity for the hydrogen evolution reaction (HER). An overpotential of 124 mV is needed to reach a current density of 10 mA cm–2 with a Tafel slope of only 89 mV dec–1, which is superior to that of pure CoS/CC (141 mV along with 103 mV dec–1) and other reported cobalt-based catalysts. Notably, after the chronopotentiometry test for 50 h, the overpotential of CoS@CoNi-LDH/CC increased by 17 mV only.

Research Area(s)

  • metal−organic frameworks, sulfides, electrodeposition, heterostructural catalysts, hydrogen evolution