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

Doping Ti into RuO2 to Accelerate Bridged‐Oxygen‐Assisted Deprotonation for Acidic Oxygen Evolution Reaction DOI
Wei Hu,

Bolong Huang,

Mingzi Sun

et al.

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

Published: Nov. 30, 2024

Abstract The development of efficient and durable electrocatalysts for the acidic oxygen evolution reaction (OER) is essential advancing renewable hydrogen energy technology. However, slow deprotonation kinetics oxo‐intermediates, involving four proton‐coupled electron steps, hinder OER progress. Herein, a RuTiO x solid solution electrocatalyst investigated, which features bridged (O bri ) sites that act as proton acceptors, accelerating oxo‐intermediates. Electrochemical tests, infrared spectroscopy, density functional theory results reveal moderate adsorption on O facilitates fast through adsorbate mechanism. This process effectively prevents over‐oxidation deactivation Ru caused by lattice Consequently, shows low overpotential 198 mV at 10 mA cm −2 geo performance exceeding 1400 h 50 with negligible deactivation. These insights into mechanism structure‐function relationship are crucial advancement catalytic systems.

Language: Английский

Citations

5
Fabrication of superaerophobic Ru-doped c-CoSe2 for efficient hydrogen production DOI
Yujie Wei, Jianying Wang,

Yahang Shang

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(9), P. 5294 - 5306

Published: Jan. 1, 2024

Ru-doped c-CoSe 2 with a superaerophobic leaf-like microarray hollow structure was fabricated to show excellent HER catalytic performance.

Language: Английский

Citations

4
海胆状CoTe-CoP异质结构催化剂在全pH范围内高效析氢 DOI

Shaoke Zhu,

Minghui Xing,

Z.W. Lu

et al.

Science China Materials, Journal Year: 2024, Volume and Issue: 67(6), P. 1891 - 1899

Published: May 6, 2024

Language: Английский

Citations

4
Nb Doping Induced the Formation of Protective Layer to Improve the Stability of Fe‐Ni3S2 for Seawater Electrolysis DOI

Minghui Xing,

Shitao Wang,

Jimmy Yun

et al.

Small, Journal Year: 2024, Volume and Issue: 20(46)

Published: Aug. 9, 2024

Abstract The seawater electrolysis to produce hydrogen is a significant topic on alleviating the energy crisis. Here, Fe, Nb‐Ni 3 S 2 catalyst prepared by metal‐doping strategy, and it shows high oxygen evolution reaction (OER) activity in alkaline medium, only needs 1.491 V deliver current density of 100 mA cm −2 simulated seawater. Using as bifunctional catalyst, two‐electrode electrolyzer requires voltage 1.751 (without impedance compensation) drive 50 , can run over 150 h stably Importantly, In situ Raman test demonstrates that outstanding performance ascribed formed sulfate protective layer induced Nb doping, which effectively inhibit corrosion chloride ion, while absent for Fe‐Ni . stable operation under industrial further confirms stability improvement mechanism forming layer. short, this study provides new strategy using dopants inducing formation enhance electrolysis.

Language: Английский

Citations

4
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

Citations

4