Waste plastic upcycling: MoO₂/C nanocomposites supported on Ni foam for efficient oxygen evolution reaction

IF 2.8 3区化学 Q4 CHEMISTRY, PHYSICAL

Chemical Physics Pub Date : 2026-04-01 Epub Date: 2025-12-18 DOI:10.1016/j.chemphys.2025.113071

Soubhagya Ranjan Panda , Sanjay Upadhyay , Ruby Priya , Abhishek Chandel , O.P. Pandey

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Abstract

Herein, MoO₂/C nanocomposites was synthesized in a single-step reduction process using waste plastic polyethene (C₂H₄)ₙ as a carbon source. The effect of supporting carbon content on the oxygen evolution reaction (OER) activity of MoO₂ nanoparticles is investigated. The hydrocarbons present in the polyethene acts as reducing agents during synthesis. The synthesized samples are characterized using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). The highly conductive supporting carbon acts like a highway for the charge carries between MoO₂ nanoparticles. The amount of carbon is optimized to get highest possible activity from the MoO₂ nanoparticles. Furthermore, the sample MoO₂/C (C3) shows optimal OER performance with a low overpotential of 1.58 V vs RHE at current density of 10 mA cm⁻². Chronoamperometry Stability of 18 h shows that all the samples possess good stability under alkaline medium. The amount of supporting carbon plays a crucial role to achieve optimal OER performance from MoO₂ nanoparticles.

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废塑料升级回收：镍泡沫支撑的MoO₂/C纳米复合材料用于高效析氧反应

本文以废塑料聚乙烯（C₂H₄）为碳源，采用一步还原法合成了MoO2/C纳米复合材料。研究了负载碳含量对MoO2纳米颗粒析氧反应活性的影响。聚乙烯中的碳氢化合物在合成过程中起还原剂的作用。利用x射线衍射（XRD）、拉曼光谱（Raman spectroscopy）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和x射线光电子能谱（XPS）对合成的样品进行了表征。高导电性的支撑碳就像MoO2纳米颗粒之间的电荷携带的高速公路。优化了碳的用量，使MoO2纳米颗粒的活性尽可能高。此外，样品MoO2/C （C3）在电流密度为10 mA cm−2时表现出最佳的OER性能，过电位低至1.58 V vs RHE。18h的计时安培稳定性表明，样品在碱性介质中具有良好的稳定性。负载碳的数量对MoO2纳米颗粒获得最佳OER性能起着至关重要的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

4.30%

发文量

278

审稿时长

39 days

期刊介绍： Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.