电化学沉积非晶双金属镍铁(氧)氢氧化物的高效析氧反应电催化剂

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis Pub Date : 2022-12-31 DOI:10.1007/s12678-022-00808-5

Zhichao Xu, Jianmin Wang, Jiajia Cai, Yitao He, Jing Hu, Haijin Li, Yongtao Li, Yong Zhou

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引用次数: 1

摘要

低成本、高性能的析氧反应电催化剂，特别是金属(氧)氢氧化物因其良好的析氧活性而受到广泛关注。无定形电催化剂由于具有更强的活性和结构灵活性而优于晶体电催化剂。然而，使用传统的制备技术仍然存在很大的障碍。采用电沉积技术在泡沫镍表面制备了具有大表面积和小电荷转移电阻的非晶态NiFe(氧)氢氧化物。制备的NiFe(氧)氢氧化物(Ni:Fe = 1:3)对OER具有良好的电催化活性和稳定性，电流密度为100 mA cm-2，过电位为245 mV, Tafel斜率较小，为76.9 mV dec−1，优于贵金属电催化剂(RuO2)和大多数NiFe基电催化剂。本研究为制备高效水裂解金属(氧)氢氧化物催化剂提供了一种简便有效的方法。

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Electrochemical Deposited Amorphous Bimetallic Nickle-Iron (Oxy)hydroxides Electrocatalysts for Highly Efficient Oxygen Evolution Reaction

The low-cost and high-performance electrocatalysts, especially metal (oxy)hydroxides, for the oxygen evolution reaction (OER) have attracted considerable attention due to their promising OER activity. Amorphous electrocatalysts are often superior to their crystalline counterparts due to their more actives and structural flexibility. However, using traditional preparation techniques still presents a significant barrier. Herein, the amorphous NiFe (oxy)hydroxides on nickel foam (NF) with large surface area and small charge transfer resistance were fabricated by electrodeposition technique. The as-fabricated NiFe (oxy)hydroxides (Ni:Fe = 1:3) exhibited remarkable electrocatalytic activity and stability for OER with a low overpotential of 245 mV at a current density of 100 mA cm^–2, a small Tafel slope of 76.9 mV dec⁻¹, which was superior to that of noble metal electrocatalysts (RuO₂) and most NiFe-based electrocatalysts. This work provides a facile and effective way to synthesis metal (oxy)hydroxide catalysts towards high-efficiency water splitting.

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

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.