Ultrafine Co3O4 nanoparticles-engineered binary metal nitride nanorods with interfacial charge redistribution for enhanced water splitting,Journal of Materials Chemistry A

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Ultrafine Co3O4 nanoparticles-engineered binary metal nitride nanorods with interfacial charge redistribution for enhanced water splitting
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-10-12 , DOI: 10.1039/d3ta04768g
Dinh Chuong Nguyen ₁ , Thi Luu Luyen Doan ₂ , Xinfeng Zhu ₁ , Nam Hoon Kim _{1,

3} , Joong Hee Lee _{1,

3,

4}

Affiliation

Herein, an efficient bifunctional electrocatalyst based on binary metal nitride (Zn₃N₂–Co₂N) nanorod arrays decorated with ultrathin Co₃O₄ nanoparticles is prepared to improve overall water splitting performance. Notably, a charge redistribution process occurs at the heterointerface between the host metal nitride and the guest Co₃O₄, resulting in the regulation of both their electronic structures to facilitate the reaction kinetics of hydrogen/oxygen evolution reaction (HER/OER). Using the material to catalyze the HER, current density of 10 and 50 mA cm⁻² are delivered at small overpotential of 80.5 and 121.7 mV, respectively. Similarly, for OER, under the action of the material, overpotential of only 271.7 and 335.7 mV, respectively, is required to achieve 10 and 50 mA cm⁻². Thus, an electrolyzer is assembled with the material as both cathode and anode, and shows high performance with a small cell voltage of 1.59 V at 10 mA cm⁻², and excellent stability.

中文翻译：

超细 Co3O4 纳米颗粒工程二元金属氮化物纳米棒，具有界面电荷重新分布，可增强水分解

在此，制备了一种基于用超薄Co ₃ O _{4纳米颗粒装饰的二元金属氮化物（Zn}₃ N ₂ –Co ₂ N）纳米棒阵列的高效双功能电催化剂，以提高整体水分解性能。值得注意的是，电荷重新分布过程发生在主体金属氮化物和客体Co ₃ O ₄之间的异质界面处，从而调节它们的电子结构以促进析氢/析氧反应（HER/OER）的反应动力学。使用该材料催化HER，分别在80.5和121.7 mV的小过电势下提供10和50 mA cm ^{-2的电流密度。}类似地，对于OER，在材料的作用下，仅需要分别271.7和335.7 mV的过电势即可达到10和50 mA cm ^-2。^{因此，用该材料组装的电解槽既作为阴极又作为阳极，并表现出高性能，在10 mA cm -2}下电池电压为1.59 V ，并且具有优异的稳定性。

更新日期：2023-10-16

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