Synthesis of a Paddlewheel-Based 3D Co-MOF and Its Co3Se4-Derived Composite as an Electrocatalyst for Water Oxidation.

IF 4.7 2区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Pub Date : 2025-10-02 DOI:10.1021/acs.inorgchem.5c03446

Litun Kumar Pradhan,Ranjay K Tiwari,Manisha Sadangi,J N Behera

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引用次数: 0

Abstract

Cobalt selenides, such as Co3Se4, are promising electrocatalysts for the oxygen evolution reaction (OER), but their synthesis via pyrolysis is hindered by the redox sensitivity of selenium. Here, we report a strategy to overcome this challenge by employing a three-dimensional (3D) metal-organic framework (MOF), [Co3(BTC)2(Ade)2]·DMF·H2O (Co-BTC-Adenine MOF), as a precursor. The Co-BTC-Adenine MOF, synthesized solvothermally, featured a paddlewheel-type network with one-dimensional (1D) channels and was characterized by single-crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). Upon pyrolysis at 600 °C, a Co3Se4-based composite (Co3Se4@600) embedded in an N-doped carbon matrix was obtained. This composite exhibited a low overpotential of 235 mV at 10 mA cm-2, a Tafel slope of 61 mV dec-1, and excellent durability for over 68 h in alkaline media. The enhanced OER performance is attributed to the porous hybrid architecture, improved conductivity, and synergistic interactions between Co3Se4 and the carbon support. This work presented a temperature-controlled route for fabricating robust, nonprecious OER electrocatalysts from MOF precursors.

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基于桨轮的三维Co-MOF及其co3se4衍生物的水氧化电催化剂的合成。

硒化钴，如Co3Se4，是很有前途的析氧反应电催化剂，但硒的氧化还原敏感性阻碍了它们的热解合成。在这里，我们报告了一种克服这一挑战的策略，通过采用三维（3D）金属有机框架（MOF）， [Co3(BTC)2(Ade)2]·DMF·H2O （co -BTC-腺嘌呤MOF）作为前体。溶剂热合成的co - btc -腺嘌呤MOF具有一维通道的桨轮型网络，并通过单晶x射线衍射（SCXRD）、粉末x射线衍射（PXRD）和热重分析（TGA）对其进行了表征。在600 ℃下热解后，得到了包埋在n掺杂碳基体中的co3se4基复合材料（Co3Se4@600）。该复合材料在10 mA cm-2下的过电位为235 mV， Tafel斜率为61 mV dec1，并且在碱性介质中具有超过68小时的优异耐久性。OER性能的增强归因于多孔杂化结构、电导率的提高以及Co3Se4与碳载体之间的协同相互作用。这项工作提出了一种由MOF前体制备坚固的非贵重OER电催化剂的温控路线。

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

Inorganic Chemistry 化学-无机化学与核化学

CiteScore

7.60

自引率

13.00%

发文量

1960

审稿时长

1.9 months

期刊介绍： Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.