Enhancing Acidic Water Electrolysis via Local Electronic Regulation of Ru/TiOx Catalyst with Oxygen Coordination Unsaturated Ti Sites DOI
Wei Xia, Kai Yuan, Xuejie Cao

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 15(2), P. 768 - 779

Published: Dec. 25, 2024

Effective local electron regulation in ruthenium-based catalysts acidic oxygen evolution reactions (OER) remains a key challenge. The lack of unified understanding catalyst activity and stability based on limits the further development proton exchange membrane water electrolysis (PEMWE). In this study, we develop concept coordination unsaturated Ti (TiOCU) sites. Based constructed dual-oxide heterojunction interface Ru/TiOx catalyst, achieve precise modulation d-electron orbitals Ru charge redistribution between Ru–Obridge–TiOCU units strengthened Ru–O bonds suppresses formation high-valence species deactivation catalyst. Combined with density functional theory (DFT) calculations situ spectroscopic experiments, confirm that dz2 orbital significantly optimizes deprotonation process interfacial hydroxyl-rich interface, thereby enhancing OER kinetics dominance adsorbed mechanism (AEM). Consequently, exhibits superior performance, achieving current 10 mA/cm2 at an overpotential only 237 mV 0.5 M H2SO4, demonstrates for over 160 h. This work reveals application TiOCU, providing perspective transition metal defect materials electrolysis.

Language: Английский

A restricted dynamic surface self-reconstruction toward high-performance of direct seawater oxidation DOI Creative Commons
Ling Zhou, Daying Guo,

Lianhui Wu

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 20, 2024

Abstract The development of highly efficient electrocatalysts for direct seawater splitting with bifunctionality inhibiting anodic oxidation reconstruction and selective oxygen evolution reactions is a major challenge. Herein, we report electrocatalyst that achieves long-term stability more than 1000 h at 600 mA/cm 2 @η high selectivity (Faraday efficiency 100%). This catalyst revolves an amorphous molybdenum oxide layer constructed on the beaded-like cobalt interface by atomic deposition technology. As demonstrated, new restricted dynamic surface self-reconstruction mechanism induced formation stable reconstructed Co-Mo double hydroxide phase layer. device assembled into two-electrode flow cell overall electrolysis maintained 1 A/cm @1.93 V 500 Faraday higher 95%. Hydrogen generation rate reaches 419.4 mL/cm /h, power consumption (4.62 KWh/m 3 H ) lower pure water (5.0 industrial current density.

Language: Английский

Citations

65
Designing 3d Transition Metal Cation-Doped MRuOx As Durable Acidic Oxygen Evolution Electrocatalysts for PEM Water Electrolyzers DOI
Panpan Sun, Zelong Qiao,

Xiaobin Dong

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(22), P. 15515 - 15524

Published: May 24, 2024

The continuous dissolution and oxidation of active sites in Ru-based electrocatalysts have greatly hindered their practical application proton exchange membrane water electrolyzers (PEMWE). In this work, we first used density functional theory (DFT) to calculate the energy Ru 3d transition metal-doped MRuOx (M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn) evaluate stability for acidic oxygen evolution reaction (OER) screen out ZnRuOx as best candidate. To confirm theoretical predictions, experimentally synthesized these materials found that indeed displays robust OER with a negligible decay η10 after 15 000 CV cycles. Of importance, using anode, PEMWE can run stably 120 h at 200 mA cm–2. We also further uncover mechanism ZnRuOx, i.e., Zn atoms doped outside nanocrystal would form "Zn-rich" shell, which effectively shortened average Ru–O bond lengths strengthen interaction therefore boosted intrinsic OER. short, work not only provides new study paradigm DFT calculations guide experimental synthesis but offers proof-of-concept metal dopants RuO2 stabilizer universal principle develop high-durability catalysts PEMWE.

Language: Английский

Citations

60
Heterostructured electrocatalysts for the oxygen evolution reaction DOI

Shao-Lan Zheng,

Huimin Xu, Hongrui Zhu

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(30), P. 18832 - 18865

Published: Jan. 1, 2024

This review focuses mainly on the overall facilitating effect of heterostructures OER process. The fabrication heterostructured electrocatalysts and relationship between their structures electrocatalytic properties are discussed.

Language: Английский

Citations

24
Unveiling the Role of Surface Self‐Reconstruction of Metal Chalcogenides on Electrocatalytic Oxygen Evolution Reaction DOI

Weiwei Bao,

Jiangying Liu, Taotao Ai

et al.

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

Published: Sept. 10, 2024

Abstract Transition metal chalcogenides are an important class of electrocatalysts with broad application prospects in alkaline oxygen evolution reactions. Many researchers focusing on the situ conversion cations catalysts, but have rarely considered contribution oxidation, leaching, and re‐absorption to catalytic activity. Herein, multiple characterization approaches used monitor mechanism origin CoTe@CoS‐electrocatalyzed reaction (OER) The research results reveal that electro‐oxidative dissolution Te S electrode surface forms TeO 3 2− SO , which adsorbed surface. Moreover, species will further transform into 4 . As expected, extra addition mixed tellurite sulfate ions Co (OH) 2 electrolyte produces a synergistic effect can significantly boost OER Selenites analogous effect, indicating adsorption chalcogenates has universal improving performance. findings this work provide unique insights materials enhancing activity during processes.

Language: Английский

Citations

23
Iron Molybdenum Sulfide‐Supported Ultrafine Ru Nanoclusters for Robust Sulfion Degradation‐Assisted Hydrogen Production DOI
Jiahui Wang, Min Zhou, Rong Fu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(27)

Published: March 5, 2024

Abstract Electrocatalytic hydrogen evolution and (S 2− ) recycling present promising strategies for cost‐effective production simultaneous removal of environmental pollutants. However, the advancement this technology is hindered by limited availability affordable, efficient, stable catalysts. Herein, study synthesizes ultrafine ruthenium (Ru) nanoclusters on a substrate iron molybdenum sulfide (FeMo‐S) nanosheets, creating new heterointerface catalyst (FeMo‐S/Ru) reaction (HER) sulfion oxidation (SOR). Experimental theoretical calculations suggest that strong electron interactions between Ru FeMo‐S substrate, optimizing *H adsorption promoting HER activity one side while facilitating sulfur intermediates other side, effectively catalyzing SOR. Additionally, assembled electrocatalytic coupling system with FeMo‐S/Ru displays an ultralow cell voltage 0.57 V at 100 mA cm −2 , achieving high Faradaic efficiencies (>96%) H 2 production, also exhibiting remarkable durability over 1 month (838 h). This work paves way development highly efficient durable supported catalysts, enabling energy‐saving environmentally friendly recycling.

Language: Английский

Citations

21
Zipper‐Like Interlocked Heterostructure of NiFe Layered Double Hydroxide‐WN for Super‐Stable Oxygen Evolution over 4500 h DOI

Minghui Xing,

Zelong Qiao,

Shaoke Zhu

et al.

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

Published: July 22, 2024

Abstract The nickel‐iron based materials are widely studied as excellent oxygen evolution reaction (OER) electrocatalysts. However, its relatively poor OER stability limits practical applications. Herein, a zipper‐like interlocked heterostructure of NiFe layered double hydroxide (LDH)‐WN is constructed. LDH‐WN exhibits not only ultrahigh activity 228 mV overpotential at current density 50 mA cm −2 , but also extremely long‐term over 4500 h and 550 an industrial ≈350 which ascribed to special structure. Moreover, in situ Raman confirms that the presence WN can efficiently achieve LDH reconstruction slower metal dissolution during OER, therefore boosts stability. DFT calculations reveal increase *O adsorption capability conductivity layer, anchor atoms layer improve energy barrier. In short, this work presents new method constructing Ni‐Fe‐based catalysts, would accelerate application.

Language: Английский

Citations

16
Research progress of the porous membranes in alkaline water electrolysis for green hydrogen production DOI
Yutong Wu,

Guoqing Xu,

Junbo Zhou

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159291 - 159291

Published: Jan. 1, 2025

Language: Английский

Citations

5
Electrocatalysts for hydrogen and oxygen evolution reactions under neutral/near-neutral conditions: Summary and challenges DOI

Humayun Irshad,

Muhammad Fakhar Zia, Rashid Al‐Hajri

et al.

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

Citations

3
Double‐Walled Tubular Heusler‐Type Platinum–Ruthenium Phosphide as All‐pH Hydrogen Evolution Reaction Catalyst Outperforming Platinum and Ruthenium DOI
Yongju Hong, Seong Chan Cho,

Soobean Kim

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(12)

Published: Feb. 2, 2024

Abstract Nanostructured ionic compounds have driven major technological advancements in displays, photovoltaics, and catalysis. Current research focuses on refining the chemical composition of such compounds. In this study, a strategy for creating stoichiometrically well‐defined nanoscale multiple‐cation systems, where atomically precise structure maximizes synergistic cooperation between cations at atomic scale is reported. The unprecedented construction Heusler‐type PtRuP 2 double‐walled nanotubes through sequential anion/cation exchange reactions demonstrated. catalyst exhibits record‐high catalytic performance durability hydrogen evolution reaction (HER) alkaline electrolytes anion‐exchange membrane water electrolyzers. investigations highlight crucial role Pt/Ru dual centers, providing multiple active sites that accelerate HER kinetics within single phosphide material, operation H O activation/dissociation Ru production adjacent Pt sites. These findings open new avenues optimizing compound‐based electrocatalysts, offering platinum‐metal alternatives acidic media.

Language: Английский

Citations

15
Single Atom Ru Doped Ni2P/Fe3P Heterostructure for Boosting Hydrogen Evolution for Water Splitting DOI
Xiuhui Li,

ZeYuan Niu,

Mang Niu

et al.

Small, Journal Year: 2024, Volume and Issue: 20(27)

Published: Jan. 29, 2024

Abstract Modulating the chemical composition and structure has been considered as one of most promising strategies for developing high‐efficient water splitting catalysts. Here, a single‐atom Ru doped Ni 2 P/Fe 3 P catalyst is synthesized by introducing dispersed atoms to adjust heterostructure. Single atom provides effective hydrogen evolution reaction (HER) active sites boosting catalytic activities. The with only 0.2 wt.% content exhibits an overpotential 19.3 mV at 10 mA cm −2 , which obviously lower than 146.1 P. Notably, alkaline overall electrolyzer based on Ru‐Ni catalysts achieves cell voltage 1.47 V operates over 600 h superior that benchmark RuO //Pt/C (1.61 V). theoretical calculations further confirm single doping can effectively optimize hydrogen/water adsorption free energy site therefore improve HER activity This work valuable reference design high‐activity durability through double modulation interface‐effect atomic doping.

Language: Английский

Citations

13