Sustainable H2O2 Production via 2e– ORR on Alkalinized Tubular C3N4 from Melamine Waste Integrating with Fenton Wastewater Treatment

ACS Sustainable Resource Management Pub Date : 2025-07-16 DOI:10.1021/acssusresmgt.5c00228

Hongyu Song, Huijing Ma, Haifei Wang, Yichan Wen, Chengcheng Cai, Jiyi Sun, Xufang Qian* and Yixin Zhao*,

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Abstract

The utilization of waste resources stands as a sustainable approach for circular strategy. Herein, we report an alkalinized tubular carbon nitride (A-C₃N₄-T) catalyst derived from melamine waste, addressing waste utilization while exhibiting remarkable 2e^– ORR activity. Density functional theory calculations reveal its tailored electronic structure optimizes *OOH intermediate adsorption, promoting the 2e^– ORR pathway. The catalyst delivers a high H₂O₂ productivity of 26.2 mol g^–1 h^–1 under 300 mA cm^–2 and maintains operational stability for over 220 h. The tandem of H₂O₂ electrosynthesis and Fenton reactor was used for water treatment. This study elucidates the 2e^– ORR mechanism of melamine-waste-derived C₃N₄ and offers a sustainable strategy for H₂O₂ electrosynthesis and its integration into advanced oxidation processes, providing a future vision of oxidant self-supporting decentralized electrosynthesis/waste water treatment integration system.

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三聚氰胺废水碱化管状C3N4与Fenton废水处理相结合的2e - ORR可持续制H2O2研究

废物资源的利用是循环战略的可持续途径。在此，我们报道了一种碱化管状氮化碳（A-C3N4-T）催化剂，该催化剂来源于三聚氰胺废物，在处理废物利用的同时表现出显著的2e - ORR活性。密度泛函理论计算表明，其定制的电子结构优化了*OOH中间吸附，促进了2e - ORR途径。在300 mA cm-2条件下，催化剂的H2O2产率高达26.2 mol g-1 h - 1，并保持220 h以上的运行稳定性。本研究阐明了三聚氰胺废物衍生的C3N4的2e - ORR机制，并为H2O2电合成及其与高级氧化工艺的集成提供了可持续的策略，为氧化剂自支撑分散电合成/废水处理集成系统的未来发展提供了前景。

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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ACS Sustainable Resource Management

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