The newly developed catalyst significantly enhances the stability and efficiency of the oxygen evolution reaction (OER) in acidic media.
The study identifies RZW as a novel catalyst that improves OER performance by leveraging the electron-withdrawing properties of tungsten (W) and the sacrificial behavior of zinc (Zn).
According to the findings, zinc dissolves from the catalyst during the initial OER process, releasing electrons that are subsequently absorbed by tungsten species. This electron accumulation enhances catalytic activity by modifying the electronic environment of the ruthenium (Ru) sites.
Additionally, tungsten plays a stabilizing role by preferentially occupying bridge sites, preserving the active Ru configurations and maintaining the catalyst’s structural integrity and efficiency even after zinc dissolution.
The research team analyzed the catalyst's structural and electronic properties under OER conditions using a combination of theoretical density functional theory (DFT) calculations and advanced experimental techniques, including Fourier-transform extended X-ray absorption fine structure (FT-EXAFS), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS).
The results indicate that zinc's rapid dissolution enhances electron transfer, improving both the catalyst's OER activity and long-term stability.
This breakthrough demonstrates how strategic doping with tungsten and the use of sacrificial metals like zinc can greatly improve the performance of OER catalysts. Our findings suggest that this approach offers a promising pathway for developing high-performance, cost-effective catalysts for green hydrogen production, which is crucial in the transition to renewable energy.
Hao Li, Associate Professor and Study Corresponding Author, Advanced Institute for Materials Research, Tohoku University
The research has been made accessible through the Hao Li Lab's Digital Catalysis Platform (DigCat), the largest experimental catalysis database to date.
The study was supported by the Tohoku University Support Program, which provided funding for the article processing charge (APC).
Next, the RZW catalyst will be tested in full electrolyzer systems to assess its performance in practical applications. The research team aims to contribute to the development of more efficient and scalable hydrogen production technologies by bridging the gap between fundamental research and real-world implementation.
Photoelectrochemical (PEC) Water Splitting for Hydrogen Production
Journal Reference:
Li, C., et al. (2025) W‐mediated electron accumulation in Ru‐O‐W motifs enables ultra‐stable oxygen evolution reaction in acid. Angewandte Chemie International Edition. doi.org/10.1002/anie.202422707.