RT Journal Article
T1 BaNiO3 Electrocatalysts for Oxygen Evolution Reaction: the Role of Synthetic Methods
A1 Gutiérrez Martín, Daniel
A1 Varela Losada, María Áurea
A1 Torres Pardo, María De La Almudena
A1 Hernando González, María
A1 González Calbet, José María
A1 Parras Vázquez, Marina Marta
A1 Matesanz, Emilio
A1 Portehault, David
AB BaNiO3 and other Ba-Ni-O related phases are among the most active non-precious electrocatalysts towards the oxygen evolution reaction (OER) in basic media but the relationships between the synthesis conditions and the electrochemical properties have not been thoroughly investigated, which prevents further optimization of the materials performances. In this work, we compare the electrocatalytic activities of hexagonal perovskite BaNiO3 prepared by three different synthesis methods: sol-gel, metal nitrate decomposition and molten salts. We show by combining atomic-scale imaging and spectroscopic techniques how the choice of the synthesis method influences the chemical, morphological and microstructural features of the materials. We especially demonstrate by Energy Electron Loss Spectroscopy and X-Ray Photoelectron Spectroscopy that previously reported electrocatalytic results concerning BaNiO3 prepared in molten salts are actually related to the presence of an unreported nickel hydroxide shell, which ultimately results in enhanced electrocatalytic activity. These results highlight how the synthesis method can strongly influence oxygen electrocatalysis, which paves the way to further surface engineering of other energy materials.
PB American Chemical Society
SN 0020-1669
YR 2025
FD 2025-10-04
LK https://hdl.handle.net/20.500.14352/126349
UL https://hdl.handle.net/20.500.14352/126349
LA eng
NO BaNiO3 Electrocatalysts for Oxygen Evolution Reaction: The Role of Synthetic Methods D. Gutiérrez-Martín, A. Varela, A. Torres-Pardo, M. Hernando, E. Matesanz, J. M. González-Calbet, David Portehault, and M. Parras Inorganic Chemistry 2025 64 (36), 18385-18393 DOI: 10.1021/acs.inorgchem.5c02875
NO Comunidad de Madrid
NO European Union
DS Docta Complutense
RD 15 abr 2026