Science

Chemists uncover the true active surface of nickel catalysts

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 08/10/2026, 22:10:25 UTC.

Briefings

A research team at Ulm University published in Nature Catalysis in October 2026, refuting a decades-old assumption that nickel catalysts for alkaline water electrolysis rely on nickel oxyhydroxide (NiOOH). Instead, the study concludes the active surface consists of nickel dioxide (NiO2). This finding challenges established models for the material's structure under reaction conditions.

Key points

• The catalytically active surface of nickel electrodes for alkaline water electrolysis consists of nickel dioxide (NiO2) rather than nickel oxyhydroxide (NiOOH), a conclusion refuting a decades-old assumption.
• The study was published in the journal Nature Catalysis by a research team at Ulm University in October 2026.

Context and limitations

The evidence is limited to the findings of the Ulm University research team published in Nature Catalysis in October 2026. The study does not provide details on the specific reaction conditions, experimental setup, or quantitative data regarding the stability or performance of the NiO2 surface under operational conditions.

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