Hollow RuO2 fibers with B-modification for enhanced water oxidation electrocatalysis in both acidic and alkaline media

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-05-13 DOI:10.1016/j.coco.2025.102452

Zhenhai Zhi , Xiaokun Fan , Xing Tian , Jidong Niu , Tanxu Sun , Daohao Li , Lijie Zhang , Dongjiang Yang

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引用次数: 0

Abstract

Water electrocatalysis efficiency is hindered by the sluggish electrochemical reactions involved, particularly the oxygen evolution reaction (OER). Even the benchmark RuO₂ demonstrates low activity and poor stability. Therefore, a sophisticated design of the micro-nano and electronic structures of RuO₂ is needed. In this study, one-dimensional (1D) hollow RuO₂ fibers modified with metalloid B (B-RuO₂-HF) were synthesized using renewable alginate fibers as templates. Leveraging the advantages of 1D hollow structure along with electronic modulation induced by B, B-RuO₂-HF exhibits remarkable OER activity and stability in both acidic and alkaline media. Specifically, it achieves low overpotentials (η₁₀) of 220 mV at pH = 0 and 208 mV at pH = 14. The corresponding proton exchange membrane (PEM) electrolyzer and two-electrode alkaline electrolyzer performances highlight its substantial practical potential and versatile applicability. Experiments confirm that B atoms are stably incorporated within the RuO₂ while effectively suppressing Ru overoxidation, thereby enhancing stability. Theoretical calculations indicate that the incorporation of B leads to charge accumulation at the Ru-B bond, resulting in electron depletion at Ru sites. This modulation weakens the binding strength between Ru and oxo-intermediates, consequently lowering the energy barrier for OER.

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在酸性和碱性介质中增强水氧化电催化的b改性空心RuO2纤维

水电催化效率的提高受其所涉及的缓慢的电化学反应，特别是析氧反应（OER）的影响。即使是基准的RuO2也表现出较低的活性和较差的稳定性。因此，需要对RuO2的微纳结构和电子结构进行复杂的设计。本研究以可再生海藻酸盐纤维为模板，合成了类金属B （B-RuO2- hf）改性的一维（1D）空心RuO2纤维。利用一维空心结构和B诱导的电子调制的优势，B- ruo2 - hf在酸性和碱性介质中都表现出显著的OER活性和稳定性。具体来说，它在pH = 0和pH = 14时分别达到220 mV和208 mV的低过电位（η10）。相应的质子交换膜（PEM）电解槽和双电极碱性电解槽的性能突出了其巨大的实用潜力和广泛的适用性。实验证实，B原子稳定地掺入到RuO2中，同时有效地抑制了Ru的过氧化，从而提高了稳定性。理论计算表明，B的加入导致Ru-B键的电荷积累，导致Ru位点的电子耗尽。这种调制减弱了Ru和氧中间体之间的结合强度，从而降低了OER的能垒。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.