Year: 2026
Type: preprint
Abstract: Green hydrogen is expected to play a major role in the decarbonisation of hard-to-electrify sectors such as shipping, aviation, steel, and fertiliser. Cost effective acidic water electrolysis to produce green hydrogen requires active, stable non-noble metal oxide catalysts, however non-noble metal oxides tend to be unstable at oxidative potentials in acidic media. In this work we show that Sn doped Co 3 O 4 exhibits improved activity, while using an ultrathin TiO 2 overlayer improves stability greatly without hindering activity. The maximal activity, at 5% Sn content, was comparable to the state-of-the-art for non-noble PEM anode catalysts, while the maximal stabilising effect produced by the overlayer was more than eightfold.
Source: ChemRxiv
Institution: University of Copenhagen
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7220684991