In Situ Construction of IrO_x Nanofilm on TiO_x for Boosting Low‐Ir Catalysis in Practical PEM Electrolyze

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

The advances in innovative amorphous noble-metal-based electrocatalysts

Chem Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 101324 - 101324

Published: March 1, 2025

Language: Английский

Recent Advances of Ruthenium‐Based Electrocatalysts for Industrial Water Electrolyzers

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract Hydrogen production by electrochemical water splitting is considered to be a key strategic energy technology, and proton exchange membrane electrolyzers (PEMWEs) anion (AEMWEs) are ideal technologies for green hydrogen in recent years. However, PEMWEs AEMWEs lack low‐cost high‐performance acidic oxygen evolution reaction (OER) alkaline (HER) electrocatalysts respectively, limiting their large‐scale development. Recently, ruthenium (Ru)‐based have received lot of attention because activity better than that commercial catalysts price more affordable, showing great potential OER HER. there still obstacles Ru‐based practical applications industrial electrolyzers, regulatory strategies need developed further optimize its performance. Herein, comprehensive review presented concerning it. First, fundamental principles focus the basic content application discussed. Then, summarized, providing detailed analysis elucidate mechanisms, properties, electrolyzers. Finally, outlooks prospects challenges future proposed.

Language: Английский