Multi‐d Electron Synergy in LaNi_1‐xCo_xRu Intermetallics Boosts Electrocatalytic Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(1)

Published: Nov. 21, 2023

Despite the fact that d-band center theory links d electron structure of transition metals to their catalytic activity, it is yet unknown how synergistic effect multi-d electrons impacts performance. Herein, novel LaNi1-x Cox Ru intermetallics containing 5d, 4d, and 3d were prepared. In these compounds, 5d orbital La transfers 4d Ru, which provides adsorption sites for H*. The orbitals Ni Co interact with generate an anisotropic distribution, facilitates desorption OH*. ensures efficient activity. optimized LaNi0.5 Co0.5 has overpotential 43mV at 10 mA cm-2 alkaline electrocatalytic hydrogen evolution reaction. Beyond offering a variety new electrocatalysts, this work reveals synergy in promoting

Language: Английский

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Microwave Quasi‐Solid State to Construct Strong Metal‐Support Interactions with Interfacial Electron‐Enriched Ru for Anion Exchange Membrane Electrolysis

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(8)

Published: Dec. 28, 2023

Abstract Regulating the metal‐support interaction of anchored metal nanoclusters is recognized as valid approach to optimize electrocatalytic performance through tuning interfacial electronic structure. However, developing novel support and understanding electron accumulation on modulating reaction kinetics are still elusive. Herein, highly‐dispersed Ruthenium (Ru) onto phosphorous doped molybdenum boride (Ru/P‐MoB) developed ultrafast microwave‐plasma (60 s) approach. The synthesized Ru/P‐MoB impressively promote hydrogen evolution with low overpotentials 34, 45, 40 mV drive 10 mA cm −2 in alkaline freshwater, seawater acid media. Specially, it presents superior turnover frequency mass/specific activity relative Pt/C, Ru/C, Ru/MoB. Moreover, anion exchange membrane (AEM) electrolyzer cell based can achieve 500 1000 small voltages 1.71 1.78 V good durability. Experimental density functional theoretical (DFT) analysis reveal that strong interactions (Ru─Mo Ru─P bonds) generated electron‐enriched Ru, then favoring water‐molecule adsorption/dissociation optimal H intermediate adsorption free energy. This work provides designing avenue exploit electrocatalysts outstanding catalytic under high current at practical high‐temperature.

Language: Английский

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Leveraging phosphate group in Pd/PdO decorated nickel phosphate microflowers via pulsed laser for robust hydrogen production in hydrazine-assisted electrolyzer

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 57, P. 176 - 186

Published: Jan. 8, 2024

Language: Английский

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In Situ Reconstructed Ru Clusters on LaRuSi₃ with Enhanced Electrocatalytic Activity for Alkaline Hydrogen Evolution

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: May 21, 2024

Abstract The surface reconstruction of electrochemically activated catalysts is an effective way to improve performance. However, there currently a dearth study on the silicide for hydrogen evolution reactions (HER). Here, new HER electrocatalyst, LaRuSi 3 , synthesized and triggered it produce Ru clusters its surface. Experimental data theoretical simulations reveal that optimize charge distribution which promotes adsorption water by sites improves Si sites. conductivity electrochemical active are also enhanced. catalyst has overpotential 45 mV attain current density 10 mA cm −2 in alkaline media, exceeds majority other Ru‐based compounds. This work contributes exploration more efficient novel silicides electrocatalysts broadens application techniques.

Language: Английский

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The component-activity interrelationship of cobalt-based bifunctional electrocatalysts for overall water splitting: Strategies and performance

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 91, P. 453 - 474

Published: Jan. 9, 2024

Language: Английский

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Recent Development and Future Frontiers of Oxygen Reduction Reaction in Neutral Media and Seawater

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(23)

Published: Feb. 1, 2024

Abstract The oxygen reduction reaction (ORR) in neutral media is of great importance due to its potential optimize energy generation and storage application. With the increasing urgency for sustainable efficient solutions, comprehensively understanding enhancing ORR performance such have become crucial. This review aims shed light on this critical yet challenging area. encapsulates fundamental principle latest breakthrough field electrocatalysts, with a distinct focus innovative synthesis strategies creating novel, efficient, robust electrocatalysts. A succinct evaluation strengths, limitations, performance, mechanism presented. essential findings are analyzed their implications future research directions. Finally, an outlook current advances, challenges, recommendations provided. serves as stepping‐stone toward harnessing underutilizing within extensive aquatic environment.

Language: Английский

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Advances in Oxygen Evolution Reaction Electrocatalysts via Direct Oxygen–Oxygen Radical Coupling Pathway

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

Published: Jan. 15, 2025

Abstract Oxygen evolution reaction (OER) is a cornerstone of various electrochemical energy conversion and storage systems, including water splitting, CO 2 /N reduction, reversible fuel cells, rechargeable metal‐air batteries. OER typically proceeds through three primary mechanisms: adsorbate mechanism (AEM), lattice oxygen oxidation (LOM), oxide path (OPM). Unlike AEM LOM, the OPM via direct oxygen–oxygen radical coupling that can bypass linear scaling relationships intermediates in avoid catalyst structural collapse thereby enabling enhanced catalytic activity stability. Despite its unique advantage, electrocatalysts drive remain nascent are increasingly recognized as critical. This review discusses recent advances OPM‐based electrocatalysts. It starts by analyzing mechanisms guide design Then, several types novel materials, atomic ensembles, metal oxides, perovskite molecular complexes, highlighted. Afterward, operando characterization techniques used to monitor dynamic active sites examined. The concludes discussing research directions advance toward practical applications.

Language: Английский

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Regenerative mechanism in bifunctional CoB electrocatalyst to enhance H2 production for overall water splitting in prototype electrolyzer

Fuel, Journal Year: 2025, Volume and Issue: 388, P. 134450 - 134450

Published: Jan. 24, 2025

Language: Английский

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Constructing Mo-Co2P/Ni12P5 heterostructures as highly efficient electrocatalysts for overall water splitting

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 637, P. 236597 - 236597

Published: Feb. 22, 2025

Language: Английский

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Mutual promotion by structural design and intrinsic activity coupling of CNTs/MoC/CoNiMo for water splitting and urea electrolysis

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 343, P. 123470 - 123470

Published: Nov. 10, 2023

Language: Английский

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