Electrochemical Growth and Formation Mechanism of Cu2Se/CoSe2-Based Bifunctional Electrocatalyst: A Strategy for the Development of Efficient Material toward Water Electrolysis,ACS Applied Energy Materials

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Electrochemical Growth and Formation Mechanism of Cu2Se/CoSe2-Based Bifunctional Electrocatalyst: A Strategy for the Development of Efficient Material toward Water Electrolysis
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2022-02-08 , DOI: 10.1021/acsaem.1c03497
Manisha Das ₁ , Greesh Kumar ₁ , Ramendra Sundar Dey ₁

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The advancement in the non-noble metal-based catalyst design for water oxidation with admirable performance is crucial for a sustainable and green energy future. Electrochemical growth for the synthesis of the catalyst has been known to be an appealing method due to its shorter reaction time, low cost, and renewable nature. In this article, a simple electrochemical deposition method for the synthesis of hybrid nanostructures of earth-abundant transition metal selenides (Cu₂Se/CoSe₂) on copper foam (Cuf) has been explored the bifunctional electrochemical activity of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline medium. The HER exhibited an overpotential of only 110 mV at a current density of 10 mA cm^–2 and OER required the potential of only 1.4 V (outperforming noble metal catalyst RuO₂) at a current density of 20 mA cm^–2. The electrochemical cell composed of Cuf@Cu₂Se/CoSe₂ catalyst in a two-electrode system as an anode as well as a cathode showed high-performance overall water oxidation reaction with a very low applied potential of only 1.56 V at a current density of 10 mA cm^–2. The as-prepared electrode was proven to be superhydrophilic as well as aerophobic in nature, which enhances the stability and thus suited the best candidate for industrialization and practical applications.

中文翻译：

Cu2Se/CoSe2 基双功能电催化剂的电化学生长和形成机理：一种开发高效电解水材料的策略

用于水氧化的非贵金属催化剂设计的进步具有令人钦佩的性能，对于可持续和绿色能源的未来至关重要。由于其较短的反应时间、低成本和可再生性，用于合成催化剂的电化学生长已被认为是一种有吸引力的方法。在本文中，研究了一种简单的电化学沉积方法，用于在泡沫铜 (Cuf) 上合成富含地球丰富的过渡金属硒化物 (Cu ₂ Se/CoSe ₂ ) 的混合纳米结构，以及析氢反应 (HER) 的双功能电化学活性。和碱性介质中的析氧反应（OER）。^{在 10 mA cm –2}的电流密度下，HER 的过电位仅为 110 mVOER在 20 mA cm ^–2的电流密度下仅需要 1.4 V 的电势（优于贵金属催化剂 RuO ₂ ）。由 Cuf@Cu ₂ Se/CoSe ₂催化剂在双电极体系中作为阳极和阴极组成的电化学电池表现出高性能的整体水氧化反应，在电流密度下只有 1.56 V 的极低施加电位10 mA cm ^–2。所制备的电极被证明具有超亲水性和厌氧性，从而提高了稳定性，因此是工业化和实际应用的最佳候选者。

更新日期：2022-02-08

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