铜-镍双金属配位聚合物作为新型铜-镍氧化物电催化剂的前驱体用于 OER

IF 2.7 4区 化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis Pub Date : 2024-05-25 DOI:10.1007/s12678-024-00876-9
Johnnys da Silva Hortêncio, Rafael A. Raimundo, Rodolfo B. da Silva, Daniel Araújo Macedo, Sherlan Guimarães Lemos, Fausthon Fred da Silva
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引用次数: 0

摘要

由于电催化水分离反应的动力学过程缓慢,电子传递过程复杂,发生在阳极的氧进化反应(OER)已成为一个主要障碍,因此受到广泛关注。OER 性能的提高归功于可访问表面活性位点的显著增强和电荷转移电阻的降低。探索高效、廉价和稳定的 OER 电催化剂对于能量转换和储存具有重要意义。目前,过渡金属氧化物(TMOs)因其低成本、氧化还原化学性质和高化学稳定性而显示出作为 OER 电极材料的巨大潜力。本研究采用浸渍法合成了掺杂 Ni 的铜基金属氧化物(CuO、Cu0.9Ni0.1O、Cu0.7Ni0.3O 和 Cu0.5Ni0.5O/NiO),作为碱性条件下氧进化反应的高效低能电催化剂。这项研究将过渡金属的卓越催化效率与 MOF 的大比表面积和大量孔隙相结合。在电流密度为 10 mA cm-2 时,所有材料的过电位值分别为 359、352、346 和 340 mV。塔菲尔斜率分别为 82.5、47、65 和 54 mV dec-1,长期催化反应的衰减非常小。因此,本方法为制备应用于 OER 的高效、低成本材料开辟了一条新途径。
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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Copper-Nickel Bimetallic Coordination Polymers as Precursors for New Cu-Ni Oxide Electrocatalyst for OER

Electrocatalytic water splitting has received widespread attention due to the slow kinetics of the reaction and the complex electron transfer process, the oxygen evolution reaction (OER) occurring at the anode has become a major obstacle. The improved OER performance is attributed to the significant enhancement in accessible surface active sites and the decrease in charge transfer resistance. The exploration of efficient, cheap, and stable electrocatalysts for OER is of significant importance for energy conversion and storage. Currently, transition metal oxides (TMOs) show enormous potential as electrode materials for OER due to their low cost, redox chemistry, and high chemical stability. In this work, an impregnation method is demonstrated to synthesize Cu-based metal oxides doped with Ni (CuO, Cu0.9Ni0.1O, Cu0.7Ni0.3O, and Cu0.5Ni0.5O/NiO) as high-efficiency and low-energy electrocatalysts for the oxygen evolution reaction under alkaline conditions. This work combines the excellent catalytic efficiency of the transition metal with the large specific surface area and the substantial number of pores of the MOF. All materials show good overpotential values of 359, 352, 346, and 340 mV at a current density of 10 mA cm−2. The Tafel slopes are 82.5, 47, 65, and 54 mV dec−1, respectively, with very small attenuation for long-term catalytic reactions. Furthermore, the electrocatalysts showed short-term electrochemical stability for 12 h. Therefore, the present method opens a new path for the preparation of efficient and low-cost materials for application in OER.

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来源期刊
Electrocatalysis
Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY
CiteScore
4.80
自引率
6.50%
发文量
93
审稿时长
>12 weeks
期刊介绍: Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.
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