Issue 9, 2023

Interfacing NiV layered double hydroxide with sulphur-doped g-C3N4 as a novel electrocatalyst for enhanced hydrogen evolution reaction through Volmer–Heyrovský mechanism

Abstract

The exploration of non-noble-metal-based catalysts for the hydrogen evolution reaction (HER) is important for the green synthesis of hydrogen via electrochemical water splitting. Graphitic carbon nitride (g-C3N4) is a widely studied photocatalyst for the HER; however, its intrinsic catalytic activity is poor. In the present study, bare and S-doped g-C3N4 were combined with the less explored NiV layered double hydroxide (LDH) and their performance for electrochemical HER catalysis was studied. The fused layers of the composites result in a higher specific surface area and expose a higher number of active centres for better catalytic activity. The composite of sulphur-doped g-C3N4 and the NiV LDH showed the least overpotential in comparison with its counterparts, with commendable stability during continuous operation for 8 h. The kinetics of the HER are enhanced by compositing g-C3N4 with the NiV LDH, as indicated by the Tafel slope of 79 mV dec−1 and impedance spectroscopy analysis. This study proposes a novel g-C3N4/NiV LDH-based composite for the HER and gives a comprehensive analysis of the catalytic mechanism in the prepared catalysts.

Graphical abstract: Interfacing NiV layered double hydroxide with sulphur-doped g-C3N4 as a novel electrocatalyst for enhanced hydrogen evolution reaction through Volmer–Heyrovský mechanism

Supplementary files

Article information

Article type
Paper
Submitted
21 jún 2023
Accepted
25 júl 2023
First published
25 júl 2023
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2023,2, 1464-1475

Interfacing NiV layered double hydroxide with sulphur-doped g-C3N4 as a novel electrocatalyst for enhanced hydrogen evolution reaction through Volmer–Heyrovský mechanism

G. Srividhya, C. Viswanathan and N. Ponpandian, Energy Adv., 2023, 2, 1464 DOI: 10.1039/D3YA00287J

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