Synthesis of ruthenium oxide nanosheets with fourth-period elements for alkaline oxygen evolution reaction.

IF 6.6 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science and Technology of Advanced Materials Pub Date : 2026-08-24 eCollection Date: 2026-01-01 DOI:10.1080/14686996.2026.2722026

Shuhei Dake, Saikat Bolar, Takeshi Fujita

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引用次数: 0

Abstract

A comprehensive series of Ru-based bimetallic oxide nanosheets with fourth-period elements (M = Cr, Mn, Fe, Co, Ni, Cu, Zn, and Ga) was synthesized via a unified puffing-template combustion method and systematically evaluated for the alkaline oxygen evolution reaction (OER). As revealed by X-ray diffraction, among the examined metals, Cr and Ga exclusively induced chemically selective solid-solution formation within the rutile RuO₂ lattice, a structural prerequisite for modulating the electronic structure of the active Ru sites and enhancing the OER activity. The OER activity of the optimal compositions Ru_0.38Ga_0.62Ox and Ru_0.71Cr_0.29O_x surpassed that of pristine RuO_x. However, a 50 h chronopotentiometric study revealed a decisive shift in the activity-stability relationship, with Ru_0.71Cr_0.29O_x maintaining a nearly constant operating potential, whereas Ru_0.38Ga_0.62O_x rapidly deactivated due to Ga³⁺ leaching. X-ray photoelectron spectroscopy and electron microscopy confirmed that Cr³⁺ acts as a valence-pinning agent, suppressing Ru oxidation, thereby reducing the density of oxygen vacancies and number of stable covalent Ru-O bonds. The results demonstrate that Ru_0.72Cr_0.29O_x is a promising and durable anode for the alkaline OER and highlight the importance of durability testing in concurrence with overpotential benchmarking.

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四周期元素氧化钌纳米片的合成及其在碱性析氧反应中的应用。

采用统一的膨化模板燃烧法合成了一系列含四周期元素（M = Cr、Mn、Fe、Co、Ni、Cu、Zn和Ga）的ru基双金属氧化物纳米片，并对其碱性出氧反应（OER）进行了系统评价。x射线衍射显示，在所检测的金属中，Cr和Ga在金红石RuO2晶格内完全诱导化学选择性固溶体形成，这是调节活性Ru位点的电子结构和提高OER活性的结构先决条件。最优组合Ru0.38Ga0.62Ox和Ru0.71Cr0.29Ox的OER活性均优于原始组合RuOx。然而，一项50小时的时间电位研究显示，活性-稳定性关系发生了决定性的变化，Ru0.71Cr0.29Ox保持了几乎恒定的工作电位，而Ru0.38Ga0.62Ox由于Ga3+浸出而迅速失活。x射线光电子能谱和电镜证实，Cr3+作为价钉剂，抑制Ru氧化，从而降低氧空位密度和稳定共价键Ru- o的数量。结果表明，Ru0.72Cr0.29Ox是一种很有前途的耐用碱性OER阳极，并强调了耐久性测试与过电位基准测试的重要性。

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来源期刊

Science and Technology of Advanced Materials 工程技术-材料科学：综合

CiteScore

10.60

自引率

3.60%

发文量

审稿时长

4.8 months

期刊介绍： Science and Technology of Advanced Materials (STAM) is a leading open access, international journal for outstanding research articles across all aspects of materials science. Our audience is the international community across the disciplines of materials science, physics, chemistry, biology as well as engineering. The journal covers a broad spectrum of topics including functional and structural materials, synthesis and processing, theoretical analyses, characterization and properties of materials. Emphasis is placed on the interdisciplinary nature of materials science and issues at the forefront of the field, such as energy and environmental issues, as well as medical and bioengineering applications. Of particular interest are research papers on the following topics: Materials informatics and materials genomics Materials for 3D printing and additive manufacturing Nanostructured/nanoscale materials and nanodevices Bio-inspired, biomedical, and biological materials; nanomedicine, and novel technologies for clinical and medical applications Materials for energy and environment, next-generation photovoltaics, and green technologies Advanced structural materials, materials for extreme conditions.