Coupling of Nickel Boride and Ni(OH)2 Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

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

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Detail(s)

Original languageEnglish
Pages (from-to)4555-4561
Journal / PublicationChemCatChem
Volume10
Issue number20
Online published19 Aug 2018
Publication statusPublished - 23 Oct 2018

Abstract

Earth-abundant and highly-efficient electrocatalysts for oxygen evolution reaction (OER) are urgently desired to realize the large-scale storage and conversion of renewable energies. In this work, we develop a hierarchical porous electrocatalyst structure utilizing Ni(OH)2 nanosheets directly synthesized on Ni foam as the conductive and interconnected supports. By coupling with amorphous Ni−B nanoparticles, this hybrid catalyst exhibits dramatically enhanced electrocatalytic activities and durabilities towards OER. In specific, along with the optimized Ni−B loading, this catalyst requires only an impressively small overpotential of 300 mV to drive a current density of 100 mA cm−2 for oxygen evolution in 1 M KOH electrolyte. Meanwhile, it also yields a small Tafel slope of 49 mV dec−1 and a superior long-term stability. All these results evidently indicate that the hierarchical hybridization of Ni−B with Ni(OH)2 on Ni foam can effectively synergize the oxygen evolution, opening up a new vista for designing high-performance transition metal-based nanostructures in the field of electrochemical water splitting.

Research Area(s)

  • hierarchical hybridization, Ni(OH)2 nanosheets, Ni−B nanoparticles, oxygen evolution reaction, synergistic effects

Citation Format(s)

Coupling of Nickel Boride and Ni(OH)2 Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction. / Liang, Xiaoguang; Dong, Ruoting; Li, Dapan; Bu, Xiuming; Li, Fangzhou; Shu, Lei; Wei, Renjie; Ho, Johnny C.

In: ChemCatChem, Vol. 10, No. 20, 23.10.2018, p. 4555-4561.

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