Advances in Layered double Hydroxide-based Materials for CO2 Electroreduction: A Comprehensive Review of recent Research Progress
Résumé
Please provide Text for Abstract. Over the past decade, layered double hydroxides (LDH), known as ionic lamellar
compounds, have been described as promising materials for CO2 adsorption and its photocatalytic conversion. These LDH
applications have been already reviewed in previous papers. Interestingly, over the past three years, LDH have been also
used for the design of modified electrodes applied to CO2 electroreduction (CO2ER). This review presents, for the first
time, an overview of these recent developments in the synthesis of electrocatalysts based on LDH and their performance in
CO2ER. In this field of applications, LDH act either i) as electrocatalysts, ii) as supports for other electrocatalysts, iii) as
precursors for the generation of metal nanoparticles or metal oxide electrocatalysts through chemical or electrochemical
conversions. The composition of the as-prepared electrocatalysts and electrolysis conditions modify the reduction products
formed. ZnAl-based LDH appears to be a promising catalyst for CO formation, and CuAl-LDH for formate. A chemical or
electrochemical activation of copper-based LDH to obtain Cu+ and/or Cu0 active species appears to be a very promising
method for generating valuable products, such as acetate, methanol or ethylene. This review will be useful for new
prospects on LDH-based electrocatalysts applied on CO2ER.
