Metal organic frameworks‐derived NiO/NiCo2O4 heterostructures for effective methanol oxidation reaction

IF 3.8 3区化学 Q2 CHEMISTRY, PHYSICAL

ChemCatChem Pub Date : 2024-09-14 DOI:10.1002/cctc.202401277

Yuan Xin, Jieyu Ma, Qian Zhang, Zhizhou Wang, Li Jiang, Haidong Bian, Qianli Zhang, Jie Liu

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引用次数: 0

Abstract

The electrochemical process of methanol oxidation reaction (MOR), which is closely associated with electrochemical production of formate and hydrogen, is considered a highly viable avenue for advancing renewable energy technologies. Nevertheless, the development and creation of affordable, effective, and durable electrocatalysts for MOR continue to present significant obstacles. In this study, a hierarchical porous NiO/NiCo2O4/NF electrode is fabricated through the integration of solvothermal and thermal oxidation treatments of Ni‐MOF‐74 and NiCo‐Asp. After thoroughly assessing the electrochemical performance for MOR, NiO/NiCo2O4/NF demonstrates a significant current density of 140 mA·cm‐2 at 1.6 V (vs. RHE) and a Tafel slop of 45.0 mV·dec‐1 in 1 M KOH and 0.5 M methanol. The excellent performance of MOR can be ascribed to the hierarchical porous nature that enhances mass and electron transport while offering numerous active sites for electrocatalytic reactions. Additionally, the heterointerface between NiO and NiCo2O4 could further enhance electron transfer rate and reaction kinetics for the MOR. The developed NiO/NiCo2O4/NF electrode shows potential as a viable and economical alternative to Pt‐based electrocatalysts for MOR‐based applications.

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金属有机框架衍生的 NiO/NiCo2O4 异质结构用于有效的甲醇氧化反应

甲醇氧化反应（MOR）的电化学过程与甲酸盐和氢气的电化学生产密切相关，被认为是推进可再生能源技术的一个非常可行的途径。然而，开发和创造经济、有效和耐用的甲醇氧化反应电催化剂仍然面临着重大障碍。在本研究中，通过对 Ni-MOF-74 和 NiCo-Asp 进行溶解热处理和热氧化处理，制备出了分层多孔 NiO/NiCo2O4/NF 电极。在全面评估了 MOR 的电化学性能后，NiO/NiCo2O4/NF 在 1.6 V（相对于 RHE）电压下的电流密度达到了 140 mA-cm-2，在 1 M KOH 和 0.5 M 甲醇中的 Tafel slop 值为 45.0 mV-dec-1。MOR 的优异性能可归因于其分层多孔性质，这种性质可增强质量和电子传输，同时为电催化反应提供大量活性位点。此外，NiO 和 NiCo2O4 之间的异质界面可进一步提高 MOR 的电子传输速率和反应动力学。在基于 MOR 的应用中，所开发的 NiO/NiCo2O4/NF 电极具有替代铂基电催化剂的经济可行性。

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

ChemCatChem 化学-物理化学

CiteScore

8.10

自引率

4.40%

发文量

511

审稿时长

1.3 months

期刊介绍： With an impact factor of 4.495 (2018), ChemCatChem is one of the premier journals in the field of catalysis. The journal provides primary research papers and critical secondary information on heterogeneous, homogeneous and bio- and nanocatalysis. The journal is well placed to strengthen cross-communication within between these communities. Its authors and readers come from academia, the chemical industry, and government laboratories across the world. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies, and is supported by the German Catalysis Society.