Rare Earth‐Induced CoO6 Octahedral Distortion in Perovskite: An Efficient Catalytic Platform for RuO2‐Catalyzed Water Oxidation DOI

Kunhong Jiang,

Yong Jiang, Zhong Liang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 22, 2024

Abstract Rare earth (RE)‐based perovskites are considered as promising platform for oxygen evolution reaction (OER) due to their low cost and tunable structures. However, the systematic synthesis of perovskite catalysts with satisfactory performance has rarely been reported. Herein, a general synthetic protocol RE‐substituted LaCoO 3 (RE‐LCO) is demonstrated. Particularly, after loaded RuO 2 , as‐prepared :0.2Ce‐LCO hybrid structures exhibit OER overpotential 135 mV at 10 mA cm −2 in 1.0 m KOH, together remarkable long‐term operation, representing one most efficient robust Ru‐based catalysts. Comprehensive experimental results indicate that enhanced mechanism attributed Ce‐substitution, which alters geometric configuration CoO 6 octahedra generates more vacancies. Furthermore, interaction between Ce‐LCO stabilizes valence state Ru site. Theoretical calculations corroborate Co 3d orbitals overlap Ce 4f near Fermi level, greatly improving electron transfer atoms.

Language: Английский

NH3-Induced In Situ Etching Strategy Derived 3D-Interconnected Porous MXene/Carbon Dots Films for High Performance Flexible Supercapacitors DOI Creative Commons
Yongbin Wang, Ningjun Chen, Bin Zhou

et al.

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Oct. 18, 2023

2D MXene (Ti3CNTx) has been considered as the most promising electrode material for flexible supercapacitors owing to its metallic conductivity, ultra-high capacitance, and excellent flexibility. However, it suffers from a severe restacking problem during fabrication process, limiting ion transport kinetics accessibility of ions in electrodes, especially direction normal surface. Herein, we report NH3-induced situ etching strategy fabricate 3D-interconnected porous MXene/carbon dots (p-MC) films high-performance supercapacitor. The pre-intercalated carbon (CDs) first prevent expose more inner electrochemical active sites. partially decomposed CDs generate NH3 nanosheets toward p-MC films. Benefiting structural merits ionic transmission channels, film electrodes achieve gravimetric capacitance (688.9 F g-1 at 2 A g-1) superior rate capability. Moreover, optimized is assembled into an asymmetric solid-state supercapacitor with high energy density cycling stability, demonstrating great promise practical applications.

Language: Английский

Citations

59
Accelerated deprotonation with a hydroxy-silicon alkali solid for rechargeable zinc-air batteries DOI Creative Commons
Yaobin Wang, Xinlei Ge, Qian Lü

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Nov. 1, 2023

Transition metal oxides are promising electrocatalysts for zinc-air batteries, yet surface reconstruction caused by the adsorbate evolution mechanism, which induces zinc-ion battery behavior in oxygen reaction, leads to poor cycling performance. In this study, we propose a lattice mechanism involving proton acceptors overcome performance of OER process. We introduce stable solid base, hydroxy BaCaSiO4, onto surfaces PrBa0.5Ca0.5Co2O5+δ perovskite nanofibers with one-step exsolution strategy. The HO-Si sites on BaCaSiO4 significantly accelerate transfer from OH* adsorbed during As proof concept, rechargeable assembled composite electrocatalyst is an alkaline environment over 150 hours at 5 mA cm-2 galvanostatic charge/discharge tests. Our findings open new avenues designing efficient batteries.

Language: Английский

Citations

52
Anchored Cobalt Nanoparticles on Layered Perovskites for Rapid Peroxymonosulfate Activation in Antibiotic Degradation DOI
Yaobin Wang, Dong Li, Xinlei Ge

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(27)

Published: April 16, 2024

Abstract In the Fenton‐like reaction, revealing dynamic evolution of active sites is crucial to achieve activity improvement and stability catalyst. This study reports a perovskite oxide in which atomic (Co 0 ) situ embedded exsolution occurs during high‐temperature phase transition. unique anchoring strategy significantly improves Co 3+ /Co 2+ cycling efficiency at interface inhibits metal leaching peroxymonosulfate (PMS) activation. The Co@L‐PBMC catalyst exhibits superior PMS activation ability could 99% degradation tetracycline within 5 min. combination experimental characterization density functional theory (DFT) calculations elucidates that electron‐deficient oxygen vacancy accepts an electron from 3d‐orbital, resulting significant delocalization site, thereby facilitating adsorption *HSO /*OH intermediate onto “metal‐V O bridge” structure. work provides insights into mechanism level, will guide rational design next‐generation catalysts for environmental remediation.

Language: Английский

Citations

38
Hydrogen Spillover Phenomenon at the Interface of Metal-Supported Electrocatalysts for Hydrogen Evolution DOI
Jiayuan Li, Yuanyuan Ma, Johnny C. Ho

et al.

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(6), P. 895 - 904

Published: March 1, 2024

ConspectusHydrogen spillover, as a well-known phenomenon for thermal hydrogenation, generally involves the migration of active hydrogen on surface metal-supported catalysts. For thermocatalytic spillover takes place from metals with superiority dissociating molecules to supports strong adsorption under H

Language: Английский

Citations

30
Durable Ru Nanocrystal with HfO2 Modification for Acidic Overall Water Splitting DOI Creative Commons
Xiangkai Kong, Jie Xu,

Zhicheng Ju

et al.

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: April 30, 2024

Durable and efficient bi-functional catalyst, that is capable of both oxygen evolution reaction hydrogen under acidic condition, are highly desired for the commercialization proton exchange membrane water electrolysis. Herein, we report a robust L-Ru/HfO

Language: Английский

Citations

19
Transforming Adsorbate Surface Dynamics in Aqueous Electrocatalysis: Pathways to Unconstrained Performance DOI Open Access
Viet‐Hung Do, Jong‐Min Lee

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

Published: Jan. 28, 2025

Abstract Developing highly efficient catalysts to accelerate sluggish electrode reactions is critical for the deployment of sustainable aqueous electrochemical technologies, yet remains a great challenge. Rationally integrating functional components tailor surface adsorption behaviors and adsorbate dynamics would divert reaction pathways alleviate energy barriers, eliminating conventional thermodynamic constraints ultimately optimizing flow within systems. This approach has, therefore, garnered significant interest, presenting substantial potential developing that simultaneously enhance activity, selectivity, stability. The immense promise rapid evolution this design strategy, however, do not overshadow challenges ambiguities persist, impeding realization breakthroughs in electrocatalyst development. review explores latest insights into principles guiding catalytic surfaces enable favorable contexts hydrogen oxygen electrochemistry. Innovative approaches tailoring adsorbate‐surface interactions are discussed, delving underlying govern these dynamics. Additionally, perspectives on prevailing presented future research directions proposed. By evaluating core identifying gaps, seeks inspire rational design, discovery novel mechanisms concepts, ultimately, advance large‐scale implementation electroconversion technologies.

Language: Английский

Citations

3
Partial Exsolution Enables Superior Bifunctionality of Ir@SrIrO3 for Acidic Overall Water Splitting DOI Creative Commons
Ling Zhao, Zetian Tao, Maosheng You

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(24)

Published: April 2, 2024

Abstract The pursuit of efficient and durable bifunctional electrocatalysts for overall water splitting in acidic media is highly desirable, albeit challenging. SrIrO 3 based perovskites are electrochemically active oxygen evolution reaction (OER), however, their inert activities toward hydrogen (HER) severely restrict the practical implementation splitting. Herein, an Ir@SrIrO heterojunction newly developed by a partial exsolution approach, ensuring strong metal‐support interaction OER HER. Notably, ‐175 electrocatalyst, prepared annealing 5% H 2 atmosphere at 175 °C, delivers ultralow overpotentials 229 mV 10 mA cm −2 28 HER, surpassing most recently reported electrocatalysts. Moreover, electrolyzer using electrocatalyst demonstrates potential application prospect with high electrochemical performance excellent durability environment. Theoretical calculations unveil that constructing regulates interfacial electronic redistribution, ultimately enabling low energy barriers both

Language: Английский

Citations

17
Bioinspired Proton Pump on Ferroelectric HfO2-Coupled Ir Catalysts with Bidirectional Hydrogen Spillover for pH-Universal and Superior Hydrogen Production DOI
Wenjie Shao, Zhenyu Xing,

Xiaohui Xu

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(40), P. 27486 - 27498

Published: Aug. 28, 2024

The improvement of hydrogen evolution reaction kinetics can be largely accelerated by introducing a well-designed spillover pathway into the catalysts. However, driving force and mechanism migration on surface catalysts are poorly understood rarely explored in depth. Here, inspired specific ferroelectric property HfO

Language: Английский

Citations

15
Hydrogen spillover bridged dual nano-islands triggered by built-in electric field for efficient and robust alkaline hydrogen evolution at ampere-level current density DOI

Kecheng Tong,

Liangliang Xu,

Hanxu Yao

et al.

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 5050 - 5060

Published: March 22, 2024

Language: Английский

Citations

14
Recent Advances in Iridium‐based Electrocatalysts for Acidic Electrolyte Oxidation DOI
Wanqing Li, Yunfei Bu, Xinlei Ge

et al.

ChemSusChem, Journal Year: 2024, Volume and Issue: 17(13)

Published: Feb. 16, 2024

Abstract Ongoing research to develop advanced electrocatalysts for the oxygen evolution reaction (OER) is needed address demand efficient energy conversion and carbon‐free sources. In OER process, acidic electrolytes have higher proton concentration faster response than alkaline ones, but their harsh strongly environment requires catalysts with greater corrosion oxidation resistance. At present, iridium oxide (IrO 2 ) its strong stability excellent catalytic performance catalyst of choice anode side commercial PEM electrolysis cells. However, scarcity high cost (Ir) unsatisfactory activity IrO hinder industrial scale application sustainable development technology. This highlights importance further on Ir‐based catalysts. this review, recent advances in are summarized, including fundamental understanding mechanism, insights into catalysts, highly electrocatalysts, common strategies optimizing The future challenges prospects developing effective also discussed.

Language: Английский

Citations

12