MOF衍生的RuO2/V2O5纳米针在酸性水氧化中坚固稳定

IF 9.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2025-03-13 DOI:10.1016/j.cclet.2025.111074

Qing Li , Yumei Feng , Yuhua Xie , Qi Xu , Yifei Li , Yingjie Yu , Fang Luo , Zehui Yang

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引用次数: 0

摘要

聚合物电解质膜水分解（PEMWS）技术的产业化迫切需要一种稳定、高效的酸性介质析氧反应（OER）电催化剂。在此，我们设计了以MIL 88B为模板形成纳米针状RuO2/V2O5异质结构。将V2O5掺入到RuO2中显著提高了去质子化能力，从而获得了更好的OER性能，在10 mA/cm2下需要216 mV的过电位，相对于基准RuO2降低了27 mV。此外，RuO2和V2O5之间的电子相互作用有助于Ru氧化到高价态的增加；因此，RuO2/V2O5具有较强的稳定性。理论计算表明，经过V2O5修饰后，Ru的d带中心位移减小；同时，Ru的eg填充量增加；在这方面，OH*的吸附被削弱，符合甲醇检测，导致更高的OER性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

MOF derived RuO2/V2O5 nanoneedles for robust and stable water oxidation in acid

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MOF derived RuO2/V2O5 nanoneedles for robust and stable water oxidation in acid

A stable and efficient oxygen evolution reaction (OER) electrocatalyst in acidic medium is strongly required for the industrialization of polymer electrolyte membrane water splitting (PEMWS) technology. Herein, we devise the formation of nanoneedle-like RuO₂/V₂O₅ heterostructure with the template of MIL 88B. The incorporation of V₂O₅ to RuO₂ significantly increases the deprotonation capability resulting in a better OER performance demanding 216 mV overpotential at 10 mA/cm², lowered by 27 mV with relative to benchmarked RuO₂. Moreover, the electronic interplay between RuO₂ and V₂O₅ contributes to an increment in oxidation of Ru to high valance state; thereby, a robust stability is achieved for RuO₂/V₂O₅. From the theoretical calculation, it is noticed that the d band center of Ru is downshifted after V₂O₅ decoration; moreover, the e_g filling of Ru is simultaneously increased; in this regard, the adsorption of OH* specie is weakened, in accordance to methanol detection, resulting in a higher OER performance.

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.