Two-Step Electrochemical Deposition of Ni(OH)2/FeOOH Bilayer Electrocatalyst for Oxygen Evolution Reaction
Two-Step Electrochemical Deposition of Ni(OH)2/FeOOH Bilayer Electrocatalyst for Oxygen Evolution Reaction
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DOI：
10.1016/j.matlet.2022.132118
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发表时间：
2022-03
影响因子：
3
通讯作者：
Asako Taniguchi;Kento Ishii;Thi Kim Ngan Nguyen;T. Uchikoshi;Y. Kubota;N. Matsushita;Yoshikazu Suzuki
中科院分区：
文献类型：
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作者：
Asako Taniguchi;Kento Ishii;Thi Kim Ngan Nguyen;T. Uchikoshi;Y. Kubota;N. Matsushita;Yoshikazu Suzuki
最近发现 Ni/Fe（羟基）氢氧化物异质结构具有增强的析氧反应催化活性。然而，由于结构和形态的复杂性，该系统的材料设计尚未建立。在此，我们成功地通过简单的两步电沉积方法制备的简单 Ni(OH)2/FeOOH 双层结构获得了强协同耦合效应。优化沉积持续时间，在 FeOOH 纳米网上产生 Ni(OH)2 薄层的完全覆盖，在 10 mA cm−2 下提供 213 mV 的过电势，运行 12 小时后催化稳定性高达 97%。
Enhanced catalytic activity for the oxygen evolution reaction was recently found in Ni/Fe (oxy)hydroxide heterostructures. However, due to the structural and morphological complexities, the material design in this system is not yet established. Herein, we succeeded in obtaining strong synergetic coupling effects from a simple Ni(OH)2/FeOOH bilayer structure fabricated by a facile two-step electrodeposition method. Optimizing the deposition duration that yields full coverage of the Ni(OH)2thin layer on the FeOOH nanomesh afforded an overpotential of 213 mV at 10 mA cm−2with high catalytic stability of 97% after 12 h of operation.