Lycium ruthenicum stem extract mediated green synthesis of MnO2/Mn3(PO4)2 composite nanowire electrocatalyst for oxygen evolution reaction

Nano Express Pub Date : 2024-08-28 DOI:10.1088/2632-959x/ad70d0

Raj Kumar, Ritu Raj, Imtiaz Ahmed, Vikash Kumar, Gajendra Prasad Singh, Krishna Kanta Haldar

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Abstract

A composite of manganese oxide (MnO₂) and Mn₃(PO₄)₂ decorated nanowires (MnO₂/Mn₃(PO₄)₂) was prepared using Lycium ruthenicum stem-extract mediated green synthesis. This composite material functions as an efficient and long-lasting electrocatalyst for water-splitting reactions, which could significantly improve the performance of oxygen evolution reaction (OER). The OER activity of MnO₂/Mn₃(PO₄)₂-based nanowires is boosted by blending with a conducting support, such as manganese oxide (MnO₂). The x-ray diffraction pattern and Fourier transform infrared data indicate that the nanowires are highly crystalline. The MnO₂/Mn₃(PO₄)₂ composite material demonstrates superior stability compared to its individual constituents and generates a current density of 10 mA cm⁻² at a low overpotential of 244 mV for OER in alkaline media. This research may lead to the development of MnO₂/Mn₃(PO₄)₂ composite materials as electrocatalysts for overall water-splitting reactions.

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枸杞茎提取物介导的氧进化反应 MnO2/Mn3(PO4)2 复合纳米线电催化剂的绿色合成

利用枸杞茎提取物介导的绿色合成法制备了一种氧化锰（MnO2）和 Mn3(PO4)2 装饰纳米线（MnO2/Mn3(PO4)2）的复合材料。这种复合材料是一种高效、长效的分水反应电催化剂，可显著提高氧进化反应（OER）的性能。MnO2/Mn3(PO4)2 纳米线与导电载体（如氧化锰（MnO2））的混合提高了氧进化反应的活性。X 射线衍射图样和傅立叶变换红外数据表明，纳米线具有高度结晶性。与单个成分相比，MnO2/Mn3(PO4)2 复合材料具有更高的稳定性，并能在碱性介质中以 244 mV 的低过电位产生 10 mA cm-2 的电流密度，用于 OER。这项研究可能有助于开发 MnO2/Mn3(PO4)2复合材料，作为整体水分离反应的电催化剂。

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Nano Express

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