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Allotrope-dependent activity-stability relationships of molybdenum sulfide hydrogen evolution electrocatalysts

MoS₂ HER stability is allotrope-dependent: lamellar MoS₂ degrades under open circuit conditions, while amorphous MoS₃ₓ loses sulfur during HER, generating undercoordinated Mo sites. Simultaneous ICP-MS and EC-MS monitoring of dissolution products underpins revised stability metrics and a proposed HER mechanism accounting for both Mo and S dissolution pathways.

Allotrope-dependent activity-stability relationships of molybdenum sulfide hydrogen evolution electrocatalysts

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