Work

Probing the Efficiency of 114 Cobaltite CaBaCo 4 O 7 for the Electrochemical Oxygen Evolution Reaction

Year: 2025

Type: article

Abstract: Electrochemical technologies such as hydrogen evolution, fuel cells, and metal–air batteries demand highly efficient and durable oxygen evolution reaction (OER) electrocatalysts. Despite significant progress, the development of catalysts that combine high activity with long-term stability remains a major challenge. One of the decisive key factors in the efficiency of the OER is the optimal binding of the reaction intermediates with the electrocatalyst surface. The ternary metal compositions have emerged as promising candidates to achieve this balance and to enhance this optimal binding. In the present work, we report for the first time 114-type stoichiometric oxide CaBaCo 4 O 7 as an electrocatalyst for the OER. CaBaCo 4 O 7 shows a low OER potential with an observed overpotential of 0.34 V. These findings position CaBaCo 4 O 7 as a promising and cost-effective alternative for next-generation OER catalysts.

Source: The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5c05261

Authors: Abhishek Bharti, Vadim M. Kovrugin, Valerie Pralong

Institutions: Centre National de la Recherche Scientifique, École Nationale Supérieure d'Ingénieurs de Caen, Laboratoire de Cristallographie et Sciences des Matériaux, Université de Caen Normandie

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funders: Agence Nationale de la Recherche, Centre National de la Recherche Scientifique, Région Normandie