Fuel· 2026Q1
Yttrium doping-induced electronic structure and interfacial water modulation for alkaline hydrogen evolution
- 0citations
- Q1SCImago
- 2026year
Short summary
Yttrium doping in Co-MOF phosphide catalysts alters electronic structure and interfacial water behavior, significantly improving alkaline hydrogen evolution reaction (HER) performance with a 24 mV overpotential at 10 mA cm⁻².
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Key points
- Yttrium doping in Co-MOF phosphide catalysts was achieved via solvothermal synthesis and low-temperature phosphidation.
- Y doping induces structural evolution of interfacial water and modulates the catalyst's electronic structure through d-p-d orbital coupling.
- The optimized catalyst (10%Y-Co-MOF-0.5P/NF) shows improved water splitting and proton transport.
- The catalyst achieves a low overpotential of 24 mV at 10 mA cm⁻² and 251 mV at 1 A cm⁻² in 1 M KOH.
AI-generated from the title and abstract; the full text is not read.
Abstract
Clarifying interfacial water effects is vital for alkaline HER catalyst design. We solvothermally prepared Y-doped Co-MOF/NF, then fabricated optimized 10%Y-Co-MOF-0.5P/NF via low-temperature phosphidation. In situ tests indicate structural evolution of interfacial water driven by Y doping, while a plausible interpretation of d‑p‑d orbital coupling is put forward to rationalize the underlying electronic modulation. With more negative HER potential, 2-HBW decreases while 4-HBW and free H-down water increase. Synergistic interfacial water and electronic tuning expedite water splitting and proton transport. The catalyst only needs 24 mV overpotential at 10 mA cm −2 and 251 mV at 1 A cm −2 in 1 M KOH. This dual-regulation strategy guides non-precious MOF-derived phosphide HER catalysts.
The authors' abstract, as published at the source. Fuel, 2026 · DOI ↗
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