In Situ Construction of IrOx Nanofilm on TiOx for Boosting Low‐Ir Catalysis in Practical PEM Electrolyze DOI Open Access
Yufeng Qin, Yixuan Huang, Qingqing Ye

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Abstract Exploring low‐iridium (Ir) electrocatalysts for oxygen evolution reaction (OER) is exigent to promote the commercialization of proton electrolyte membrane water electrolyzers (PEMWEs). Herein, study presents a scalable and facile strategy in situ construct an IrO x nanofilm continuously coated on TiO support as efficient durable OER catalyst through one‐step annealing Ir‐salt‐adsorbed titanium‐based metal–organic frameworks (MOFs) precursor. The unique structure forms continuous p‐n junction interface, endowing strong interfacial electron transfer from also ensuring well‐connected conductive network anodic catalytic layer due dispersion . optimal requires low overpotential 233 mV at 10 mA cm −2 with 40‐fold com. 2 mass activity. assembled PEMWE shows cell voltage 1.762 V 1 A ≈220 h operation under start/shut‐down operation. Operando characterizations theoretical calculation reveal that not only reduces energy barrier dissociation deprotonation step *OOH boosting kinetics but prevents oxidation Ir sites form soluble species improves durability. This work offers new avenue rationally design synthesize low‐Ir application.

Language: Английский

In Situ Construction of IrOx Nanofilm on TiOx for Boosting Low‐Ir Catalysis in Practical PEM Electrolyze DOI Open Access
Yufeng Qin, Yixuan Huang, Qingqing Ye

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Abstract Exploring low‐iridium (Ir) electrocatalysts for oxygen evolution reaction (OER) is exigent to promote the commercialization of proton electrolyte membrane water electrolyzers (PEMWEs). Herein, study presents a scalable and facile strategy in situ construct an IrO x nanofilm continuously coated on TiO support as efficient durable OER catalyst through one‐step annealing Ir‐salt‐adsorbed titanium‐based metal–organic frameworks (MOFs) precursor. The unique structure forms continuous p‐n junction interface, endowing strong interfacial electron transfer from also ensuring well‐connected conductive network anodic catalytic layer due dispersion . optimal requires low overpotential 233 mV at 10 mA cm −2 with 40‐fold com. 2 mass activity. assembled PEMWE shows cell voltage 1.762 V 1 A ≈220 h operation under start/shut‐down operation. Operando characterizations theoretical calculation reveal that not only reduces energy barrier dissociation deprotonation step *OOH boosting kinetics but prevents oxidation Ir sites form soluble species improves durability. This work offers new avenue rationally design synthesize low‐Ir application.

Language: Английский

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