Synergistic effects of heterovalent states, oxygen vacancy defects, and surface wettability engineering in S-doped AgBi(MoO4)2 for photocatalytic hydrogen evolution

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 514, P. 163151 - 163151

Published: April 28, 2025

Language: Английский

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Synergistic Alkaline Hydrogen Evolution Catalysis over MoC Triggered by Doping Single Ru Atoms

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

Published: Oct. 23, 2024

Abstract The rational design of single atom‐based catalysts and precise elucidation the synergistic interaction between metal site substrate are pivotal to identifying real active sites explicating catalytic mechanisms at atomic scale, thus contributing development high‐performance for diverse industrial implementations. Herein, a Ru single‐atom doping strategy is developed activate MoC with superior hydrogen evolution reaction (HER) activity in an alkaline medium. atomically dispersed elaborately doped into nanoparticles loaded on 3D N‐doped carbon nanoflowers (Ru‐SAs@MoC/NCFs hereafter). experimental results theoretical calculations manifest that isolated dopants can effectively trigger Mo thermodynamically favorable water adsorption/dissociation energies facilitate OH − desorption H adsorption N sites, synergistically expediating overall HER kinetics. As such, well‐designed Ru‐SAs@MoC/NCFs demonstrate extraordinary low overpotential 16 mV 10 mA cm −2 1.0 m KOH electrolyte, outperforming Pt/C benchmark vast molybdenum/ruthenium‐based reported date. These findings disclose mechanistic induced by modulation suggest principle high‐efficiency electrocatalysts via atomic‐level manipulation leverage.

Language: Английский

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Engineering Nife2o4 Decorated with Iro2 on Plasma-Treated Iron Foam for Enhanced Electrocatalytic Hydrogen Evolution

Published: Jan. 1, 2025

Language: Английский

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New strategy for the enhanced electrocatalytic reduction of nitrate: Construction of charge polarization by interfacial engineering

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 693, P. 137673 - 137673

Published: April 22, 2025

Language: Английский

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Engineering NiFe2O4 decorated with IrO2 on plasma-treated iron foam for enhanced electrocatalytic hydrogen evolution

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137843 - 137843

Published: May 1, 2025

Language: Английский

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Role and advances in nonmetal doping of electrocatalysts for the hydrogen evolution reaction: a review

Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review summarizes the synthesis, modification, and characterization of nonmetal-doped HER electrocatalysts. Reported catalysts are categorized by dopant type, future prospects for non-metal doping strategies discussed.

Language: Английский

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Expediting the Volmer Step of Alkaline Hydrogen Oxidation with High-Efficiency and CO-Tolerance by Ru–O–Eu Bridge

ACS Nano, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

The quest for economical and highly efficient nanomaterials the alkaline hydrogen oxidation reaction (HOR) is imperative in advancing technology of anion exchange membrane fuel cells (AEMFCs). Efforts using Pt-based electrocatalysts HOR are greatly plagued by their finitely intrinsic activities significant CO poisoning, stemming from difficulty simultaneously optimizing surface adsorption toward different hydrogen-related adsorbates. Herein, Ru clusters coupled with Eu2O3 immobilized within N-doped carbon nanofibers (Ru/Eu2O3@N-CNFs) developed drastically boosted electrocatalysis via a d-p-f gradient orbital coupling strategy. Theoretical calculations situ operando spectroscopy discover that induction optimizes site electronic structure constructing Ru(3d)-O(2p)-Eu(4f), leading to optimal H intermediates, improved ability OH reduced energy barrier water formation, promoted oxidation, endowing Ru/Eu2O3 as promising catalyst alternative fast electrooxidation. As result, Ru/Eu2O3@N-CNFs reach an impressive kinetic current densities (jk) value 156.3 mA cm–2 at 50 mV (38.4 times higher than Pt/C), decent stability over 35000 s continuous operation. This comprehensive investigation featuring provides valuable insights strategic development high-performance Ru-based materials beyond.

Language: Английский

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Non-metallic surface-modified X-Cu (X = F, Cl, Br) metal catalysts for all-pH hydrogen evolution reaction with high performance

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 683, P. 312 - 321

Published: Dec. 12, 2024

Language: Английский

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Synergistic Effects of Ruthenium and Zinc Active Sites Fine Tune the Electronic Structures of Augmented Electrocatalysis

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

Published: Dec. 23, 2024

Abstract As the demand for cleaner energy becomes a paramount objective of sustainable development, advancement cutting‐edge engineered materials wide range applications increasingly vital. Tailoring catalyst properties through precise design and electronic state tuning is essential adapting these to large‐scale applications. Given this, an effective fine‐tuning (EFT) strategy presented optimize structures single‐atom Zn site Ru species, synergistically enhancing both electrocatalytic oxygen reduction reaction (ORR) hydrogen evolution (HER). Benefiting from interaction between species anchored on hierarchically layered nanosheets isolated atoms (Ru@Zn‐SAs/N‐C), exhibits superior ORR HER activities compared benchmark Pt/C catalyst. X‐ray absorption spectroscopy density functional theory (DFT) calculations confirm novel EFT effect single that enables Ru@Zn‐SAs/N‐C approaches optimal scaling relation * OOH OH, breaking universal limitation. Additionally, G H* value positions near apex theoretical volcano model. This work provides innovative avenue regulating localization catalytic active centers by virtue carbon substrate offers valuable insights designing high‐efficiency electrocatalysts.

Language: Английский

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Ru Nanoparticle-Anchored MoP@Mo Composites for the Hydrogen Evolution Reaction in Acidic and Alkaline Media

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Exploiting low-cost electrocatalysts with highly efficient and stable catalytic activity in both acidic alkaline solutions is the key to large-scale application of hydrogen production by water electrolysis. Here, Ru nanoparticle-anchored MoP@Mo composites were synthesized high-temperature phosphorization combined photodeposition method. Ru/MoP@Mo as an electrocatalyst for evolution reaction exhibited a Pt-like electrocatalytic activity, including low overpotentials 54 52 mV at 10 mA·cm–2 current density 0.5 M H2SO4 1.0 KOH solutions, respectively, small Tafel slopes, long-term stability mA·cm–2. Meanwhile, theoretical calculations revealed that excellent was ascribed strong electronic interaction between MoP, which optimizes adsorption tension H on surface thereby accelerates desorption H. This work provides new strategy preparing Mo-based HER high environments.

Language: Английский

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