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Review Open access Oct 2026

Polyoxometalates for Oxygen Evolution Electrocatalysis: From Molecular Active Motifs to Interfacial Regulators and Practical Electrolyzers

The oxygen evolution reaction (OER) remains the principal kinetic bottleneck in water electrolysis because its multistep proton-electron transfer is coupled with dynamic structural evolution under anodic bias. Beyond the intrinsic four-electron barrier, practical operation is constrained by metal dissolution, phase...

Xiang-Yun Liu, Li-Rong Zhang, Jia-Ran Fu et al. · 0 citations
Preprint Oct 2026

The Stability of Rutile Oxides for Oxygen Evolution Catalysis: From Mechanistic Understanding to New Descriptors

Polymer electrolyte water electrolysis is considered as a pivotal technology for green hydrogen production. Iridium dioxide (IrO2) serves as the benchmark electrocatalyst for the anodic oxygen evolution reaction (OER) in these cells. However, the scarcity and cost of iridium drives efforts to find durable and cost-effe...

Katarina Kretschmer, Michael H. Eikerling, Tobias Binninger · 0 citations
Oct 2026

Activity-Stability Balance Enabled by Orbital Splitting Energy in Ruthenium-Based Oxide Catalysts.

Ruthenium oxides have been the model catalyst for the acidic oxygen evolution reaction. It has been a challenge to achieve both stability and activity and establish a comprehensive descriptor for Ru-based catalysts. Herein, guided by the ligand field theory, we introduce the Ru orbital splitting energy (ΔRu) as a quant...

Qing-Yi Liu, Li-Feng Hang, Jin-Wu Liu et al. · 0 citations
Open access Sep 2026

An Ultrathin Hydroxide Film Governs the Stability and Reactivity of Gold for the Oxygen Evolution Reaction.

Surface oxidation of noble metals under electrochemical conditions has a decisive impact on the performance of electrocatalysts for electrolyzers and fuel cells. However, the experimental detection of such oxides on well-defined model electrodes under operando conditions is a major challenge, limiting our ability to es...

A. Grespi, A. Larsson, A. Ti et al. · 1 citation
Review Sep 2026

RuO2-Based Electrocatalysts for Acidic Oxygen Evolution: Mechanistic Origins of the Activity-Stability Trade-Off and Pathways to Rational Design.

Ruthenium dioxide (RuO2) is widely considered as a leading non-iridium candidate for the acidic oxygen evolution reaction (OER) in proton exchange membrane water electrolysis (PEMWE), owing to its high intrinsic activity and comparatively low cost. Its practical implementation, however, is fundamentally limited by a pe...

Jing-Han Zhang, Hua-Jun Qiu, Kai-Kai Li · 0 citations
Review Open access Sep 2026

High-Entropy Oxide Nanocatalysts for Water Electrolysis: Structure–Activity Relationships and Device Prospects

Green hydrogen is a key energy vector for low-carbon transition, yet water electrolysis remains constrained by sluggish reaction kinetics and the high cost of noble-metal catalysts. High-entropy oxides (HEOs), which contain multiple metal cations, exhibit characteristic high-entropy, lattice-distortion, sluggish-diffus...

Jie Yu, Hong-Bo Liu · 0 citations

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