Work

Enhancing the Oxygen Evolution Performance by Introducing NiO‐Supported Mesoporous Titanium Dioxide

Year: 2025

Type: article

Abstract: Water electrolysis for hydrogen and oxygen production has considerable potential for sustainable development as a clean energy source.Herein, a controllable and reliable method is demonstrated for the doping of mesoporous TiO 2 with nickel oxide x ‐NTO for an efficient oxygen evolution reaction. An acetic acid‐assisted soft‐template method using block copolymer polyvinylpyrrolidone as a structure‐directing agent successfully synthesizes x ‐NTO with uniform large mesopores. Compared to the pure TiO 2 mesoporous (0‐NTO), all the x ‐NTO exhibit greatly enhanced oxygen evolution reaction (OER) activity. Furthermore, the percentage of nickel oxide greatly impacts the OER performance of x ‐NTO catalysts, and the ≈3.0 wt% (3.0‐NTO) shows the greatest activity for OER, due to a 0.270 V decrease of the onset potential, while demonstrating an overpotential ( η ) of 340 mV at 10 mA cm −2 in 1 M KOH solution and higher mass activity (66.50 mA mg −1 ). Likewise, the 3.0‐NTO electrode is very durable and engaged during electrolysis, without any obvious current declines or potential wandering seen during 12.0 h of electrolysis, confirming the 3.0‐NTO's potential to serve as an electrocatalyst in energy conversion technologies.

Source: ChemistryOpen

DOI: 10.1002/open.202500377

Authors: Abdulrahman Y. Alzahrani, Mohammed A. Bahattab, Mohammed Mushab, Ganesh Kumar Anbazhagan

Institutions: King Abdulaziz City for Science and Technology, King Saud University, Saveetha University

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: gold

Estimated APC paid: $2,790