Andraž Mavrič (Author), Matjaž Valant (Author)

Abstract

Functional layered double hydroxide (LDH) usually contains different cationic substitutes to increase the activity of the oxygen evolution reaction (OER). The intrinsic OER activity of LDH materials is connected with the chemical composition and dispersion of metal cations substitutions in the matrix phase. The potential induced phase transitions, in particular hydroxide-to-oxyhydroxide transitions, are a predisposition for the high OER activity of LDH materials and can be followed by coupling the electrochemical experiments with spectroscopic techniques. The understanding of LDH catalysts under electrochemical conditions also allows an understanding of the behavior of OER catalysts based on transition metals, metal-chalcogenides, -pnictides, -carbides, and metal–organic frameworks. The surfaces of those materials are intrinsically poor OER catalysts. However, they act as precursors to catalysts, which are oxidized into a metal (oxy)hydroxide. This review summarizes the use of in situ techniques for the characterization of LDH-based OER electrocatalysts and presents the influence of these techniques on the understanding of potential induced phase transitions, identification of active sites, and reaction mechanisms.

Keywords

oxygen evolution reaction;layered double hydroxide;in-situ characterization;

Data

Language: English
Year of publishing:
Typology: 1.02 - Review Article
Organization: UNG - University of Nova Gorica
UDC: 54
COBISS: 158810115 Link will open in a new window
ISSN: 2304-6740
Views: 1065
Downloads: 8
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Other data

Type (COBISS): Not categorized
Pages: str. 1-22
Volume: ǂVol. ǂ11
Issue: ǂissue ǂ7, [article no.] 296
Chronology: Jul. 2023
DOI: 10.3390/inorganics11070296
ID: 21815656