Work

Preparation and performance of Co-Mo nano metal oxide electrocatalyst for hydrogen production by electrolysis of water

Year: 2025

Type: article

Abstract: Hydrogen production by green electricity electrolyzing water is a burgeoning technology inrecent years. The efficiency of hydrogen production is significantly influenced by the performance of catalysts in the electrolyzer. This research delves into the effects of the Mo and Co doping ratio, reaction parameters, and heating rate on catalyst performance. A series of systematic experiments elucidates how these variables impact the structure and electrochemical efficacy of the catalyst. The CoNiMoO x catalysts exhibited enhanced charge transfer characteristics when the Mo:Co mass ratio was 1:2, leading to improvements in electronic structure and active site distribution. Optimal preparation conditions, sunch as a 1℃/min heating process to 120 °C over a period of 3 h, resulted in better catalyst crystallinity, stability, electrochemical activity, and longevity. Analyses utilizing scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) confirmed a more homogeneous nanostructure and increased specific area under these optimized preparation conditions. Electrochemical evaluation further showed that the overpotential of HER was reduced by 30 % and that of OER was reduced by 15 % with the optimized catalyst. This investigation furnishes a crucial experimental foundation and theoretical underpinning for the development and synthesis of highly efficient electrocatalysts.

Source: Fuel

DOI: 10.1016/j.fuel.2025.136253

Authors: Yusheng Zhang, Wenzheng Liang, Sheng Yao, Zhihao Zheng, Cuiping Wang

Institution: Shandong University of Science and Technology

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: hybrid

Estimated APC paid: $4,330