Advanced In Situ Spectroscopic Techniques for Probing the Acidic Oxygen Evolution Reaction DOI

Shi-Yu Hong,

Ze‐Cheng Yao, Xing Cheng

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(41), P. 17219 - 17239

Published: Oct. 7, 2024

Proton exchange membrane water electrolysis (PEMWE) is a promising technology for sustainable hydrogen production. However, the anodic oxygen evolution reaction (OER) critical bottleneck restricting power-to-gas efficiency and widespread application of PEMWE devices because harsh acidic oxidative environment causes drastic catalyst structural thus severe dissolution/corrosion as well performance degradation. Currently, lack deep insight identifying real catalytic sites during distinctions mechanisms have hindered development highly active durable OER catalysts PEMWE. Therefore, elucidating OER-induced structure understanding underlying are recognized foundations technology. Against this backdrop, in situ spectroscopic characterization techniques serve powerful tools achieving goal by enabling real-time monitoring capture key intermediates. This Account summarizes recent advances cutting-edge spectroscopy probing process. The fundamentals device configurations these briefly introduced, advantages each technique intermediates to unveil also been discussed. Finally, challenges, trends, prospects field presented.

Language: Английский

Unveiling Oxygen Vacancy Engineering in CoMo‐Based Catalysts for Enhanced Oxygen Evolution Reaction Activity DOI Open Access

Na Luo,

Ao Cai,

Junhui Pei

et al.

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

Published: Jan. 8, 2025

Abstract Oxygen vacancy (V O ) engineering is widely regarded as a key strategy for enhancing CoMo‐based catalysts oxygen evolution reaction (OER) while understanding their formation mechanisms and role in boosting OER activity remains significant challenge. Herein, CoMoO x system doped developed with different 3 d ‐orbital atoms M (V, Ni, Zn, Mn) to investigate the construction stabilization of V its crucial performance. In situ ex measurements along theoretical calculations demonstrate that doping adjusts bandgap between CoMo‐ ‐p orbitals, leading transfer electrons from O‐ p orbitals M‐ thereby promoting . The leads an upshifted ‐band center, optimizing desorption intermediates on ‐CoMoVO lowering energy barrier rate‐determining step (RDS), catalyst's activity. Additionally, promotes electron Co atoms, stabilizing ultimately improving stability. resulting catalyst delivered attractive (overpotential 248 mV at 10 mA cm −2 durability over 600 h. This study offers rational method designing efficient electrocatalysts.

Language: Английский

Citations

2
Phase‐Engineered Bi‐RuO2 Single‐Atom Alloy Oxide Boosting Oxygen Evolution Electrocatalysis in Proton Exchange Membrane Water Electrolyzer DOI Open Access
Zhichao Yang, Yutian Ding, Wen Chen

et al.

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

Published: Jan. 16, 2025

Abstract Engineering nanomaterials at single‐atomic sites can enable unprecedented catalytic properties for broad applications, yet it remains challenging to do so on RuO 2 ‐based electrocatalysts proton exchange membrane water electrolyzer (PEMWE). Herein, the rational design and construction of Bi‐RuO single‐atom alloy oxide (SAAO) are presented boost acidic oxygen evolution reaction (OER), via phase engineering a novel hexagonal close packed ( hcp ) RuBi alloy. This SAAO electrocatalyst exhibits low overpotential 192 mV superb stability over 650 h 10 mA cm −2 , enabling practical PEMWE that needs only 1.59 V reach 1.0 A under industrial conditions. Operando differential electrochemical mass spectroscopy analysis, coupled with density functional theory studies, confirmed adsorbate‐evolving mechanism incorporation Bi 1 improves activity by electronic optimization hindering surface Ru demetallation. work not introduces new strategy fabricate high‐performance atomic‐level, but also demonstrates their potential use in electrolyzers.

Language: Английский

Citations

1
Atomic-Level Tin Regulation for High-Performance Zinc–Air Batteries DOI
Yunrui Li, Jiaqi Xu,

Fan Lan

et al.

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

Published: Jan. 30, 2025

The trade-off between the performances of oxygen reduction reaction (ORR) and evolution (OER) presents a challenge in designing high-performance aqueous rechargeable zinc–air batteries (a-r-ZABs) due to sluggish kinetics differing requirements. Accurate control atomic electronic structures is crucial for rational design efficient bifunctional electrocatalysts. Herein, we designed Sn–Co/RuO2 trimetallic oxide utilizing dual-active sites tin (Sn) regulation strategy by dispersing Co (for ORR) auxiliary Sn into near-surface surface RuO2 OER) enhance both ORR OER performances. Both theoretical calculations advanced dynamic monitoring experiments revealed that effectively regulated atomic/electronic environment Ru sites, which optimized *OOH/*OH adsorption behavior promoted release final products, thus breaking limits. Therefore, as-designed catalysts exhibited superb performance with an potential difference (ΔE) 0.628 V negligible activity degradation after 200,000 or 20,000 CV cycles. a-r-ZABs based on catalyst higher at wide temperature range −30 65 °C. They demonstrated ultralong lifespan 138 days (20,000 cycles) 5 mA cm–2, 39.7 times than Pt/C + IrO2 coupled low −20 Additionally, they maintained initial power density 85.8% long-term tests, significantly outperforming previously reported catalysts. More importantly, also showed excellent stability 766.45 h (about 4598 high current 10 cm–2.

Language: Английский

Citations

0
Constructing weak Ru–Mo metallic bonds to suppress Ru overoxidation for durable acidic water oxidation DOI
Yongduo Liu,

Runxu Deng,

Yang Song

et al.

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Herein, we reveal that doping Mo into RuO 2 forms a weak Ru–Mo metallic bond, which suppresses the LOM by reducing Ru–O covalency and achieves direct electron compensation from to Ru, thus preventing catalyst decay during dynamic OER process.

Language: Английский

Citations

0
Positively Charged P-Assisted Ru–Zn Dual Active Sites Promote Oxygen Radical Coupling Mechanism for Acidic Water Oxidation DOI
Guolin Zhang, Zijian Li, Haeseong Jang

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Language: Английский

Citations

0
Advanced In Situ Spectroscopic Techniques for Probing the Acidic Oxygen Evolution Reaction DOI

Shi-Yu Hong,

Ze‐Cheng Yao, Xing Cheng

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(41), P. 17219 - 17239

Published: Oct. 7, 2024

Proton exchange membrane water electrolysis (PEMWE) is a promising technology for sustainable hydrogen production. However, the anodic oxygen evolution reaction (OER) critical bottleneck restricting power-to-gas efficiency and widespread application of PEMWE devices because harsh acidic oxidative environment causes drastic catalyst structural thus severe dissolution/corrosion as well performance degradation. Currently, lack deep insight identifying real catalytic sites during distinctions mechanisms have hindered development highly active durable OER catalysts PEMWE. Therefore, elucidating OER-induced structure understanding underlying are recognized foundations technology. Against this backdrop, in situ spectroscopic characterization techniques serve powerful tools achieving goal by enabling real-time monitoring capture key intermediates. This Account summarizes recent advances cutting-edge spectroscopy probing process. The fundamentals device configurations these briefly introduced, advantages each technique intermediates to unveil also been discussed. Finally, challenges, trends, prospects field presented.

Language: Английский

Citations

2