Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137828 - 137828
Published: May 1, 2025
Language: Английский
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
Citations
3
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
Applied Surface Science, Journal Year: 2025, Volume and Issue: 694, P. 162829 - 162829
Published: Feb. 28, 2025
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 7, 2025
Abstract Ruthenium is considered one of the most promising alternatives to iridium as an anode electrocatalyst for proton exchange membrane water electrolysis (PEMWE). However, Ru‐based electrocatalysts suffer from poor stability, primarily due structural collapse under harsh acidic conditions oxygen evolution reaction (OER). Here, a design strategy introduced that significantly enhances both stability and activity RuO 2 by switching catalytic mechanism adsorbate (AEM) oxide pathway (OPM). This achieved through lattice distortion engineering using co‐doping involving large‐radius ions (Na⁺ Hf 4+ ). The incorporation Na + into induces significant distortion, shortening partial Ru─Ru bond distance optimizing electronic structure. modification facilitates direct O–O radical coupling, confirmed in situ vibrational measurements theoretical calculations. It can drive current density 1 A cm −2 PEMWE device at 60 °C with 1.646 V operates stably 85 h 0.5 . present study highlights synergistic interaction between two adjacent Ru sites promote coupling effective enhancing OER performance
Language: Английский
Citations
1
Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)
Published: Jan. 22, 2025
Abstract Seawater electrolysis offers a promising pathway to generate green hydrogen, which is crucial for the net-zero emission targets. Indirect seawater severely limited by high energy demands and system complexity, while direct bypasses pre-treatment, offering simpler more cost-effective solution. However, chlorine evolution reaction impurities in lead severe corrosion hinder electrolysis’s efficiency. Herein, we review recent advances rational design of chlorine-suppressive catalysts integrated systems architectures chloride-induced corrosion, with simultaneous enhancement Faradaic efficiency reduction cost. Furthermore, directions are proposed durable efficient systems. This provides perspectives toward sustainable conversion environmental protection.
Language: Английский
Citations
0
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
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
Citations
0
Next Materials, Journal Year: 2025, Volume and Issue: 8, P. 100553 - 100553
Published: Feb. 21, 2025
Language: Английский
Citations
0
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 11, 2025
Abstract Iridium‐based electrocatalysts are commonly regarded as the sole stable operating acidic oxygen evolution reaction (OER) catalysts in proton‐exchange membrane water electrolysis (PEMWE), but linear scaling relationship (LSR) of multiple intermediates binding inhibits enhancement its activity. Herein, compressive strain and vacancy effect exists iridium dioxide (IrO 2 )‐based catalyst by a doping engineering strategy for efficient OER In situ synchrotron characterizations elucidate that can enhance Ir─O covalency reduce Ir─Ir bond distance, (O v ) an electronic regulator causes rapid adsorption molecules on Ir adjacent Ov (Ir─O pair site to be coupled directly into * O─O intermediates. Importantly, hence, volcano‐shape curves established between strain/oxygen current using probe reaction. Theoretical calculation reveals Ni dopant modulate 5 d ‐ O p ‐band centers increasing overlap orbits trigger continuous metal site‐oxygen synergistic mechanism (MS‐O V SM) pathway, successfully breaking LSR during OER. Therefore, resultant (PEMWE) device fabricated T‐0.24Ni/IrO delivers density 500 mA cm −2 operates stably h.
Language: Английский
Citations
0
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 5, 2025
Abstract The development of highly active iridium oxides with excellent stability in acidic environments and significantly reduced Ir content is crucial for advancing competitive proton exchange membrane water electrolyzer (PEMWE) technologies. In this study, an intrinsically acid‐stable low‐iridium (Ir/IrO x (OH) y ·(H 2 O) n ) OER electrocatalyst via alkali‐assisted ethylene glycol reduction method designed. Ir/IrO shows a hollandite‐like structure abundant edge‐sharing IrO 6 octahedra that accommodates structural OH ligands its tunnels. situ/operando spectroscopies demonstrate lattice (or ligands)–mediated oxygen bypasses key rate‐limiting steps the process, including oxygen–oxygen bond formation adsorbate evolution mechanism (AEM) deprotonation (LOM), which typically hinder efficiency. Moreover, interfacial are shown to accelerate intermediates, thereby enhancing kinetics hydrogen reaction (HER). resulting catalyst achieves lower overpotential 1.79 V exhibits high durability, sustaining 1200 h at 1 A cm −2 under industrial conditions. These findings highlight potential high‐performance, durable PEMWE systems.
Language: Английский
Citations
0