Surface engineering for stable electrocatalysis

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2693 - 2737

Published: Jan. 1, 2024

Unprecedented insights into electrochemical surface dynamics from operando studies inspire electronic and topographical strategies, paving the way for sustained electrocatalytic performance across HER, OER, ORR, CO 2 RR applications.

Language: Английский

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Advanced noble-metal/transition-metal/metal-free electrocatalysts for hydrogen evolution reaction in water-electrolysis for hydrogen production

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 514, P. 215899 - 215899

Published: May 13, 2024

Language: Английский

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Modulating the Electronic Structure of Cobalt‐Vanadium Bimetal Catalysts for High‐Stable Anion Exchange Membrane Water Electrolyzer

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Aug. 15, 2024

Abstract Modulating the electronic structure of catalysts to effectively couple hydrogen evolution reaction (HER) and oxygen (OER) is essential for developing high‐efficiency anion exchange membrane water electrolyzer (AEMWE). Herein, a coral‐like nanoarray composed nanosheets through synergistic layering effect cobalt 1D guiding vanadium synthesized, which promotes extensive contact between active sites electrolyte. The HER OER activities can be enhanced by modulating nitridation phosphorization, respectively, enhancing strength metal‐H bond optimize adsorption facilitating proton transfer improve transformation oxygen‐containing intermediates. Resultantly, AEMWE achieves current density 500 mA cm –2 at 1.76 V 1000 h in 1.0 M KOH 70 °C. energy consumption 4.21 kWh Nm –3 with producing cost $0.93 per kg H 2 . Operando synchrotron radiation Bode phase angle analyses reveal that during high‐energy consumed OER, dissolution species transforms distorted Co−O octahedral into regular structures, accompanied shortening Co−Co length. This structural facilitates formation intermediates, thus accelerating kinetics.

Language: Английский

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Phosphorus-induced anti-growth of ruthenium clusters-single atoms for ultra-stable hydrogen evolution over 100,000 cycles

Joule, Journal Year: 2024, Volume and Issue: 8(6), P. 1790 - 1803

Published: June 1, 2024

Language: Английский

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Subnanometric Osmium Clusters Confined on Palladium Metallenes for Enhanced Hydrogen Evolution and Oxygen Reduction Catalysis

ACS Nano, Journal Year: 2024, Volume and Issue: 18(14), P. 9942 - 9957

Published: March 29, 2024

Highly efficient, cost-effective, and durable electrocatalysts, capable of accelerating sluggish reaction kinetics attaining high performance, are essential for developing sustainable energy technologies but remain a great challenge. Here, we leverage facile heterostructure design strategy to construct atomically thin Os@Pd metallenes, with atomic-scale Os nanoclusters varying geometries confined on the surface layer Pd lattice, which exhibit excellent bifunctional properties catalyzing both hydrogen evolution (HER) oxygen reduction reactions (ORR). Importantly, Os5%@Pd metallenes manifest low η10 overpotential only 11 mV in 1.0 M KOH electrolyte as well highly positive E1/2 potential 0.92 V 0.1 (ORR), along superior mass activities electrochemical durability. Theoretical investigations reveal that strong electron redistribution between elements renders precise fine-tuning respective d-band centers, thereby guiding adsorption intermediates an appropriate binding optimal HER ORR.

Language: Английский

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Atomic Gap-State Engineering of MoS₂ for Alkaline Water and Seawater Splitting

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 11, 2025

Transition-metal dichalcogenides (TMDs), such as molybdenum disulfide (MoS2), have emerged a generation of nonprecious catalysts for the hydrogen evolution reaction (HER), largely due to their theoretical adsorption energy close that platinum. However, efforts activate basal planes TMDs primarily centered around strategies introducing numerous atomic vacancies, creating vacancy–heteroatom complexes, or applying significant strain, especially acidic media. These approaches, while potentially effective, present substantial challenges in practical large-scale deployment. Here, we report gap-state engineering strategy controlled activation S atom MoS2 through metal single-atom doping, effectively tackling both efficiency and stability alkaline water seawater splitting. A versatile synthetic methodology allows fabrication series single-metal atom-doped materials (M1/MoS2), featuring widely tunable densities with each dopant replacing Mo site. Among these (Mn1, Fe1, Co1, Ni1), Co1/MoS2 demonstrates outstanding HER performance media, overpotentials at mere 159 164 mV 100 mA cm–2, Tafel slopes 41 45 dec–1, respectively, which surpasses all reported TMD-based benchmark Pt/C during splitting, can be attributed an optimal modulation associated sulfur atoms. Experimental data correlating doping density identity performance, conjunction calculations, also reveal descriptor linked near-Fermi gap state modulation, corroborated by observed increase unoccupied 3p states.

Language: Английский

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Transforming Adsorbate Surface Dynamics in Aqueous Electrocatalysis: Pathways to Unconstrained Performance

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

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Synergistic integration of PdCu alloy on TiO₂ for efficient photocatalytic CO₂ reduction to CH₄ with H₂O

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(35), P. 23577 - 23589

Published: Jan. 1, 2024

The synergistic effect of PdCu alloys on TiO 2 nanosheets expands the light-absorption range, improves adsorption CO and H O, accelerates photogenerated electron migration, resulting in an increased CH 4 yield with a selectivity 98.7%.

Language: Английский

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Strong d‐p Orbital Hybridization of Os‐P via Ultrafast Microwave Plasma Assistance for Anion Exchange Membrane Electrolysis

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

Published: Aug. 2, 2024

Abstract Orbital hybridization is a promising approach to modulating the electronic structure of designed electrocatalysts boost reaction kinetics. In contrast d‐d hybridization, p‐d orbital between p‐block elements and d‐block metals can provide new opportunities modulate properties thus promote catalytic performance. Herein, phosphorus‐doped osmium (P‐Os) catalyst through ultrafast (20 s) microwave plasma engineering. Theoretical calculations verify d‐p P Os, leading modulation d‐band center Os active site. Specifically, neighboring exhibit highest activity, facilitating crucial processes such as H 2 O/H* adsorption dissociation. The overpotential P‐Os in alkaline seawater only 152 mV at 1 A cm −2 , which superior reported electrocatalysts. Moreover, synthesized catalysts are integrated into an anion exchange membrane (AEM) electrolyzer, demonstrating remarkable AEM electrolyzer requires 1.86/2.02 V achieve 500/1000 mA current densities. Then, achieved have great potential for practical electrocatalytic water‐splitting applications.

Language: Английский

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Atomizing platinum for hydrogen electrode reactions

Nano Energy, Journal Year: 2023, Volume and Issue: 121, P. 109247 - 109247

Published: Dec. 29, 2023

Language: Английский

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