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Updated: Jul 14, 2026

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Proton Donors Boost Interfacial Water Activation on RuO2-Embedded RuWOx for Durable Acidic Oxygen Evolution
Yifan Huang1,2, Fantao Kong1,2, Qin Li1
1State Key Laboratory of High Performance Ceramics, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P. R. China.
None:
The activity-stability dilemma in acidic oxygen evolution reaction (OER) stems from a fundamental trade-off in the interface hydrogen-bond network: while promoting interfacial water enrichment, it often impedes efficient proton transfer. Achieving simultaneous enhancement of interfacial water accumulation and deprotonation kinetics remains a critical challenge. Herein, we design a tungsten-stabilized ruthenium oxide heterostructure (RuWOx-300) that overcomes this limitation in acidic OER. The high-valence W6+ species induce a localized electrostatic field, which enhances interfacial water enrichment. Concurrently, the W-Obri-Ru moieties serve as active Brønsted acid sites with high proton-donor capability, accelerating surface deprotonation. As a result, RuWOx-300 exhibits exceptional OER performance, requiring overpotentials of only 179 and 231 mV to achieve 10 and 100 mA cm-2, respectively, and demonstrating remarkable stability for over 4820 h at 50 mA cm-2, surpassing commercial RuO2 and most reported Ru-based catalysts. Through ab initio molecular dynamics (AIMD) simulations and in situ Raman spectroscopy, we elucidate a dual-functional mechanism: increased interfacial water coverage reduces the activation barrier for O─O bond formation, while proton-donor-enhanced transfer kinetics suppresses Ru dissolution. This work establishes a new design principle for highly active and stable acidic OER electrocatalysts via proton-donor-mediated interfacial water activation.
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