Dual Doping in Precious Metal Oxides: Accelerating Acidic Oxygen Evolution Reaction

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(4), P. 1582 - 1582

Published: Feb. 13, 2025

Developing a highly active and stable catalyst for acidic oxygen evolution reactions (OERs), the key half-reaction proton exchange membrane water electrolysis, has been one of most cutting-edge topics in electrocatalysis. A dual-doping strategy optimizes electronic environment, modifies coordination generates vacancies, introduces strain effects through synergistic effect two elements to achieve high catalytic performance. In this review, we summarize progress dual doping RuO2 or IrO2 OERs. The three main mechanisms OERs are dicussed firstly, followed by detailed examination development history catalysts, from experimentally driven systems machine learning (ML) theoretical screening systems. Lastly, provide summary remaining challenges future prospects, offering valuable insights into

Language: Английский

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Revisiting the Ruthenium Oxide-based Water Oxidation Catalysts in Acidic Media: from Amorphous to Crystalline

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110800 - 110800

Published: Feb. 1, 2025

Language: Английский

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Inhibiting Overoxidation of Dynamically Evolved RuO₂ to Achieve a Win–Win in Activity–Stability for Acidic Water Electrolysis

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Proton exchange membrane (PEM) water electrolysis offers an efficient route to large-scale green hydrogen production, in which the RuO2 catalyst exhibits superior activity but limited stability. Unveiling atomic-scale structural evolution during operando reaction conditions is critical remains a grand challenge for enhancing durability of acidic oxygen (a-OER). This study proposes adaptive machine learning workflow elucidate potential-dependent state-to-state global RuO2(110) surface within complex composition and configuration space, revealing correlation between patterns We identify active state with distorted RuO5 units that self-evolve at low potential, minor Ru dissolution self-promotion phenomenon. However, this potential resistance capacity (PRC) evolves into inert RuO4 elevated potential. To enhance PRC mitigate overevolution state, we explore metal doping engineering uncover inverse volcano-type rule: doped metal-oxygen bond strength should significantly differ from Ru-O bond. rule provides theoretical framework designing stable RuO2-based catalysts clarifies current discrepancies regarding roles different metals stabilizing RuO2. Applying rule, predict confirm experimentally Na can effectively stabilize its state. The synthesized Na-RuO2 operates a-OER over 1800 h without any degradation enables long-term PEM electrolysis. work enhances our understanding aids durable a-OER.

Language: Английский

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Microenvironment Modulation for Electronic Structure of Atomically Dispersed Ir Species in Metal–Organic Frameworks Toward Boosting Catalytic DCPD Hydrogenation Performance

Carbon Neutralization, Journal Year: 2025, Volume and Issue: 4(2)

Published: March 1, 2025

ABSTRACT The fine‐tuning of the electronic structure and local environment surrounding atomically dispersed metal centers is crucial in catalysis but remains a grand challenge that requires in‐depth exploration. In this study, Ir species were incorporated into series UiO‐type metal−organic frameworks via strong metal–support interactions (SMSI), their state was precisely modulated by regulating metal‐oxo clusters (Ce, Zr, Hf) organic ligands (BDC‐X, where X = ‐H, ‐NH 2 , ‐Me, or ‐NO ) for enhancing catalytic performance dicyclopentadiene (DCPD) hydrogenation. optimized Ir@Ce‐UiO‐66‐NO effectively transforms DCPD tetrahydrodicyclopentadiene (THDCPD), giving 100% conversion over 99% THDCPD selectivity, far superior to corresponding counterparts. Experimental theoretical results jointly demonstrated Ce‐oxo with unique Ce III /Ce IV redox pairs can facilitate electron transfer species. Furthermore, electron‐withdrawing groups play role increasing ratio, promoting efficient uptake MOF support leading low density around species, which enhances stronger between substrate molecules active sites contributes excellent activity. findings presented work provide valuable insights rational design advanced heterogeneous catalysts leveraging properties modulation capabilities supports.

Language: Английский

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Advances in dual-site mechanisms for designing high-performance oxygen evolution electrocatalysts

eScience, Journal Year: 2025, Volume and Issue: unknown, P. 100403 - 100403

Published: March 1, 2025

Language: Английский

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Lewis Acid-Mediated Interfacial Water Supply for Sustainable Proton Exchange Membrane Water Electrolysis

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

The catalyst-electrolyte interface plays a crucial role in proton exchange membrane water electrolysis (PEMWE). However, optimizing the interfacial hydrogen bonding to enhance both catalytic activity and stability remains significant challenge. Here, novel catalyst design strategy is proposed based on hard-soft acid-base principle, employing hard Lewis acids (LAs = ZrO

Language: Английский

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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

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Dynamic Deprotonation Enhancement Triggered by Accelerated Electrochemical Delithiation Reconstruction during Acidic Water Oxidation

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(9), P. 7993 - 8003

Published: Feb. 19, 2025

The structure-dependent transition in reaction pathways during acidic oxygen evolution (OER) is pivotal due to the active site oxidation accompanied by coordination environment changes. In this work, charge-polarized Ir-O-Co units are constructed alkali metal cobalt oxides (LiCoO2, and Na0.74CoO2) modify lower Hubbard band. Benefiting from accelerated delithiation reconstruction induced altered band structure, typical Ir-LiCoO2 produces high-valent Ir sites with unsaturated through charge compensation OER. Oxygen atoms shared trimetallic exhibit strong Bro̷nsted acidity, promoting proton migration for dynamically enhancing deprotonation. Furthermore, stable environment, along electron donation Co sites, significantly improves stability of sites. unique electrochemical activation results a low overpotential 190 mV at 10 mA cm-2 OER delivers exceptional 1 A 150 h slight voltage degradation exchange membrane electrolyzer. This work provides in-depth insights into relationship between catalyst mechanisms.

Language: Английский

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Recent advances and challenges in single-atom catalysts for proton exchange membrane water electrolysis

Next Materials, Journal Year: 2025, Volume and Issue: 8, P. 100553 - 100553

Published: Feb. 21, 2025

Language: Английский

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Constructing hierarchically micro-nanostructured NiFe LDH/ β-NiOOH to boost oxygen evolution reaction

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 111, P. 134 - 141

Published: Feb. 25, 2025

Language: Английский

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