Bifunctional mixed-valence ruthenium heterostructure for robust electrocatalytic water splitting in acid media

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Composites and Hybrid Materials Pub Date : 2025-01-18 DOI:10.1007/s42114-025-01234-z

Xinyu Xie, Yixiao Zhang, Yang Qin, Jianbo Wu, Ming Lei, Kai Huang, Ruyue Wang, Peng Du

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引用次数: 0

Abstract

The incorporation of non-metal dopants can significantly enhance catalytic activity and improve stability. Furthermore, the creation of heterostructures is particularly advantageous to facilitate charge transfer and optimize electronic properties. This study presents an effective bifunctional mixed-valence Ruthenium heterostructure synthesized through a cascading process involving grinding with carbon nitride and subsequent thermal treatment. The catalyst exhibits outstanding electrocatalytic performance with remarkably low overpotentials of 197 mV for the oxygen evolution reaction (OER) and 24.8 mV for the hydrogen evolution reaction (HER), respectively, with the stability exceeding 24 h at a current density of 10 mA cm⁻² in acidic media. Additionally, when employed in an acidic oxygen water splitting (OWS) electrolyzer, the bifunctional catalyst demonstrates excellent activity, achieving an ultralow cell voltage of 1.53 V to sustain 10 mA cm⁻². Enhanced performance is attributed to efficient charge transfer and increased exposure of active sites, providing valuable insights for the development of effective acidic water-electrolysis catalysts for sustainable hydrogen production.

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双官能团混合价钌异质结构在酸性介质中稳健电催化水裂解

非金属掺杂剂的掺入可以显著提高催化活性和稳定性。此外，异质结构的产生对促进电荷转移和优化电子性能特别有利。本研究提出了一种有效的双官能团混合价钌异质结构，通过与氮化碳研磨并随后进行热处理的级联工艺合成。该催化剂表现出优异的电催化性能，出氧反应（OER）和出氢反应（HER）的过电位分别为197 mV和24.8 mV，在酸性介质中电流密度为10 mA cm⁻2时稳定性超过24 h。此外，当在酸性氧水分解（OWS）电解槽中使用时，双功能催化剂表现出优异的活性，实现了1.53 V的超低电池电压以维持10 mA cm⁻2。性能的提高归功于有效的电荷转移和活性位点的增加，为开发有效的酸性水电解催化剂以实现可持续的制氢提供了有价值的见解。

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.