多任务效应Ca离子引发酸性析氧反应中RuO2配位对称性破坏

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-12-09 DOI:10.1021/acs.nanolett.4c05139

Xu Zou, Zhenyu Li, Qing Liang, Fuxi Liu, Tiantian Xu, Kexin Song, Zhou Jiang, Wei Zhang, Weitao Zheng

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引用次数: 0

摘要

开发高效稳定的酸性析氧反应电催化剂是一项既有吸引力又具有挑战性的工作。缺陷的产生是提高水氧化效率的一种新兴策略。在此，我们引入多任务Ca离子来触发RuO2中的氧空位，从而产生富含空位的RuO2 （RuO2- ov）纳米颗粒，具有增强和持续的OER活性。RuO2-Ov中的氧空位破坏了RuO6八面体的对称性，增强了Ru的d带中心，降低了Ru - o键的4d-2p杂化水平。这有效地优化了中间吸附，抑制了Ru的溶解。RuO2-OV催化剂的电流密度为10 mA/cm2，过电位仅为198 mV，稳定时间超过100 h（降解率为0.2 mV/h）。其质量活性是商用RuO2的17.9倍。我们的工作强调多任务原子结构缺陷工程有效地平衡了催化活性和稳定性之间的跷跷板关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Multitasking-Effect Ca Ions Triggered Symmetry-Breaking of RuO2 Coordination for Acidic Oxygen Evolution Reaction

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Multitasking-Effect Ca Ions Triggered Symmetry-Breaking of RuO2 Coordination for Acidic Oxygen Evolution Reaction

The development of highly active and stable electrocatalysts for the acid oxygen evolution reaction (OER) is both appealing and challenging. The generation of defects is an emerging strategy for improving the water oxidation efficiency. Herein, we introduced multitasking Ca ions to trigger oxygen vacancies in RuO₂, resulting in vacancy-rich RuO₂ (RuO₂-O_v) nanoparticles with enhanced and sustainable OER activity. The oxygen vacancy in RuO₂-O_v breaks the symmetry of the RuO₆ octahedron, enhancing the d-band center of Ru and reducing the level of 4d–2p hybridization in Ru–O bonds. This effectively optimizes intermediate adsorption and inhibits Ru dissolution. The RuO₂-O_V catalyst achieves a current density of 10 mA/cm² with an overpotential of only 198 mV, stabilizing for over 100 h (degradation rate: 0.2 mV/h). Its mass activity is 17.9 times higher than that of commercial RuO₂. Our work highlights that multitasking atomic construction defect engineering effectively balances the seesaw relationship between catalytic activity and stability.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.