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Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

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Electrochemically Induced Oxide-to-Hydroxide Transformation Enables Fast Proton Transport for Enhanced Hydrogen

Jiaying Mo¹, Lingling Zhai², Alex W Robertson^3,4

¹Wolfson Catalysis Centre, Department of Chemistry, University of Oxford, Oxford, UK.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|April 9, 2026

Summary

Researchers developed a new earth-abundant electrocatalyst for the hydrogen evolution reaction (HER). This novel Ru-Mg(OH)2 catalyst achieves performance comparable to platinum, offering a sustainable alternative for renewable energy.

Keywords:

electrocatalysis hydrogen evolution magnesium oxide single atom catalysts topotactic phase change

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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

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Published on: June 21, 2017

Area of Science:

Materials Science
Electrochemistry
Renewable Energy

Background:

Developing efficient earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) is crucial for renewable energy conversion.
Commercial platinum/carbon catalysts are effective but expensive, driving the search for alternatives.

Purpose of the Study:

To investigate an in situ phase transformation in a Ru-MgO catalyst for enhanced HER performance.
To establish a new design principle for low-platinum or platinum-free HER electrocatalysts.

Main Methods:

Electrochemical testing under acidic HER conditions.
Operando synchrotron X-ray diffraction and ex situ characterization.
Density-functional theory (DFT) calculations.

Main Results:

An electrochemically induced topotactic hydrolysis transforms Ru-MgO into Ru-Mg(OH)2(001).
The resulting hydroxide layer acts as a highly conductive proton-hopping network.
The Ru-Mg(OH)2 catalyst demonstrates performance comparable to commercial Pt/C, with a 10% improvement at -2.3 V.

Conclusions:

Electrocatalyst oxide-to-hydroxide conversion is a viable strategy for HER catalyst design.
Fast proton transport is achieved through the ordered hydroxide layer via water-assisted Grotthuss transfer.
This work presents a new pathway for creating efficient, low-cost HER electrocatalysts.