Issue 14, 2021

Graphdiyne@NiOx(OH)y heterostructure for efficient overall water splitting

Abstract

Graphdiyne (GDY), a rising star of two-dimensional (2D) carbon materials consisting of unique sp-/sp2-cohybridized carbon atoms, has been demonstrated to be an ideal platform for developing efficient catalysts with high activity and long-term durability. In this work, a new GDY-based heterostructure of GDY@NiOx(OH)y was successfully synthesized and used as an efficient electrocatalyst for water splitting. The creative incorporation of GDY with NiOx(OH)y endows the heterostructure with unique advantages; for example, the mixed valent Ni species, the strong interactions between GDY and NiOx(OH)y, and the greatly enhanced charge transfer ability, which are significantly beneficial for enhancing the catalytic activity and long-term durability. When applied in alkaline OWS electrolysis, GDY@NiOx(OH)y||GDY@NiOx(OH)y exhibited a voltage of only 1.54 V to achieve 10 mA cm−2, with robust stability over 100 h at 20 mA cm−2, much better than most of the reported benchmark catalysts, making them outstanding among water-splitting electrocatalysts.

Graphical abstract: Graphdiyne@NiOx(OH)y heterostructure for efficient overall water splitting

Supplementary files

Article information

Article type
Research Article
Submitted
25 mar 2021
Accepted
13 may 2021
First published
13 may 2021

Mater. Chem. Front., 2021,5, 5305-5311

Graphdiyne@NiOx(OH)y heterostructure for efficient overall water splitting

C. Zhang, Y. Xue, L. Hui, Y. Fang, Y. Liu and Y. Li, Mater. Chem. Front., 2021, 5, 5305 DOI: 10.1039/D1QM00466B

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