Hierarchical Ni2P@NiFe LDH Heterostructural Nanosheet Arrays for Highly Efficient Oxygen Evolution Reaction,European Journal of Inorganic Chemistry

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Hierarchical Ni2P@NiFe LDH Heterostructural Nanosheet Arrays for Highly Efficient Oxygen Evolution Reaction
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2021-08-04 , DOI: 10.1002/ejic.202100458
Xin Jin _{1,

2,

3} , Jing Li _{1,

2} , Tingting Xu ₄ , Yuting Cui ₅ , Natalia Usoltseva ₆ , Vladimir An ₆ , Xinglai Zhang ₄ , Baodan Liu _{1,

2}

Affiliation

Developing efficient and low-cost electrocatalysts toward oxygen evolution reaction (OER) has been one of the key research topics for overall water splitting due to the increasing demand for regenerated and clean energy. Herein, we report Ni₂P@NiFe LDH hierarchical heterostructures in-situ grown on nickel foam with good conductivity, strong substrate adhesion, special interface engineering and synergistic effects, which enables superior OER performance with a low overpotential of 204 mV at 10 mA cm⁻² and a small Tafel slope of 33 mV dec⁻¹ in 1 M KOH solution. This peculiar hierarchical hybrid electrode also possesses excellent electrochemical stability and long-term durability at the current density of 50 mA cm⁻² in an alkaline medium. More importantly, the proposed synthetic strategy of hierarchical heterostructures in this work will provide a general path to the preparation of various metal hydroxide catalysts for highly efficient OER.

中文翻译：

用于高效氧气释放反应的分层 Ni2P@NiFe LDH 异质结构纳米片阵列

由于对可再生和清洁能源的需求不断增加，开发高效且低成本的析氧反应（OER）电催化剂已成为整体水分解的关键研究课题之一。在此，我们报告了在泡沫镍上原位生长的Ni ₂ P@NiFe LDH 分级异质结构，该异质结构具有良好的导电性、强大的基材附着力、特殊的界面工程和协同效应，可实现卓越的 OER 性能，在 10 mA cm 时具有 204 mV 的低过电位^-2和1 M KOH 溶液中 33 mV dec ^-1的小塔菲尔斜率。这种独特的分层混合电极在 50 mA cm ^-2的电流密度下也具有优异的电化学稳定性和长期耐久性在碱性介质中。更重要的是，这项工作中提出的分层异质结构合成策略将为制备各种金属氢氧化物催化剂以实现高效 OER 提供一般途径。

更新日期：2021-09-09

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