Flores-Lasluisa, Jhony Xavier, Huerta Arráez, Francisco, Cazorla-Amorós, Diego, Morallon, Emilia
Transition metal oxides with perovskite and spinel structures for electrochemical energy production applications
Environmental Research. 2022, 214(Part 1): 113731. https://doi.org/10.1016/j.envres.2022.113731
URI: http://hdl.handle.net/10045/124680
DOI: 10.1016/j.envres.2022.113731
ISSN: 0013-9351 (Print)
Abstract: 
Transition metal oxide-based materials are an interesting alternative to substitute noble-metal based catalyst in energy conversion devices designed for oxygen reduction (ORR), oxygen evolution (OER) and hydrogen evolution reactions (HER). Perovskite (ABO3) and spinel (AB2O4) oxides stand out against other structures due to the possibility of tailoring their chemical composition and, consequently, their properties. Particularly, the electrocatalytic performance of these materials depends on features such as chemical composition, crystal structure, nanostructure, cation substitution level, eg orbital filling or oxygen vacancies. However, they suffer from low electrical conductivity and surface area, which affects the catalytic response. To mitigate these drawbacks, they have been combined with carbon materials (e.g. carbon black, carbon nanotubes, activated carbon, and graphene) that positively influence the overall catalytic activity. This review provides an overview on tunable perovskites (mainly lanthanum-based) and spinels featuring 3d metal cations such as Mn, Fe, Co, Ni and Cu on octahedral sites, which are known to be active for the electrochemical energy conversion.
Keywords:Perovskite, Spinel, Transition metals, Oxygen reduction reaction, Oxygen evolution reaction, Hydrogen evolution reaction
Elsevier
info:eu-repo/semantics/article