From 718 options to one standout, catalyst screening method reveals durable RuO₂ candidate

Synthesis and structural characterization of the V-doped RuO 2 catalyst, showing uniform incorporation of Ru, V, and O in rutile RuO 2 nanoparticles. Credit: Zhongliang Liu, Heng Liu, Kai Zhou et al.

Why settle for a trial-and-error approach, reviewing an almost endless number of combinations, when you can systematically narrow the list to something more manageable using established data and knowledge?

A team of researchers from Tohoku University and East China University of Science and Technology showed how to make informed decisions when screening for the ideal catalyst by using experimental data and scientific theories. The findings were published in Angewandte Chemie International Edition .

From vast search to shortlist

This screening process can narrow a staggering number of chemical combinations to several dozen promising catalyst candidates that can then be tested in the lab. Their recent findings show the benefits of this workflow and how it applies well to a certain ruthenium-based (Ru) catalyst. The resulting catalyst was highly efficient and showed promising practical, real-world transferability.

The team first analyzed a large data set of 718 catalysts that speed up a chemical reaction called acidic oxygen evolution. They then used theoretical models to select a promising dopant—a material that can be added in small amounts to change the properties of the base material—for RuO 2 .

Twenty metal dopants were identified, and the most promising candidate was selected using statistical analysis. This closed-loop strategy identified RuO 2 doped with vanadium (V) as a catalyst that combines high activity with long-term stability in acid.

Why vanadium improved RuO 2

To determine whether the catalyst performed as well as preliminary predictions suggested, they synthesized V-doped RuO 2 and tested it. They found that adding just a bit of vanadium does two things: It promotes deprotonation and stabilizes Ru active sites.

Ultimately, results show that V-doping was an effective method to help promote OER kinetics, making the reaction more efficient. Additionally, the doped catalyst was found to outperform commercial RuO 2 by a significant margin.

"The screening method proposed a shortlist of candidates that allowed us to pinpoint a highly promising catalyst that shows both half-cell durability and practical performance," says Hao Li, a Distinguished Professor at the Advanced Institute for Materials Research (WPI-AIMR).

"This is exciting because more efficient and durable water electrolyzers can reduce the electricity cost of green hydrogen production, support clean energy storage, renewable energy integration, and future low-carbon chemical industries."

Large-scale data mining and theoretical analysis used to identify vanadium as an effective dopant for RuO 2 in acidic oxygen evolution. Credit: Zhongliang Liu, Heng Liu, Kai Zhou et al.

Proposed dual-role mechanism of V-doped RuO 2 : Lewis acidic Ru sites promote O-H bond polarization and deprotonation, while multivalent V buffers Ru against over-oxidation. Credit: Zhongliang Liu, Heng Liu, Kai Zhou et al.

Expanding the framework further

The next step is to extend the data-theory-experiment framework to a wider range of acidic water-oxidation catalysts and realistic proton exchange membrane water electrolysis (PEMWE) operating conditions.

The research team also plans to integrate machine learning , operando characterization and microkinetic modeling to build a more general methodology for discovering durable electrocatalysts under working conditions.

Publication details

Zhongliang Liu et al, Data‐ and Theory‐Guided Design of Dual‐Role V‐Doped RuO 2 for High‐Performance Acidic Oxygen Evolution, Angewandte Chemie International Edition (2026). DOI: 10.1002/anie.8887957

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