Volume 20, Issue 43 2403029
Review

Advanced Nanocarbons Toward two-Electron Oxygen Electrode Reactions for H2O2 Production and Integrated Energy Conversion

Linjie Zhao

Linjie Zhao

State Key Laboratory of Organic–Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Riqing Yan

Riqing Yan

State Key Laboratory of Organic–Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Baoguang Mao

Baoguang Mao

State Key Laboratory of Organic–Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Rajib Paul

Rajib Paul

Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH, 44242 USA

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Wenjie Duan

Wenjie Duan

State Key Laboratory of Organic–Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Liming Dai

Liming Dai

Australian Carbon Materials Centre (A-CMC), School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052 Australia

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Chuangang Hu

Corresponding Author

Chuangang Hu

State Key Laboratory of Organic–Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

E-mail: [email protected]

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First published: 05 July 2024
Citations: 6

Abstract

Hydrogen peroxide (H2O2) plays a pivotal role in advancing sustainable technologies due to its eco-friendly oxidizing capability. The electrochemical two-electron (2e) oxygen reduction reaction and water oxidation reaction present an environmentally green method for H2O2 production. Over the past three years, significant progress is made in the field of carbon-based metal-free electrochemical catalysts (C-MFECs) for low-cost and efficient production of H2O2 (H2O2EP). This article offers a focused and comprehensive review of designing C-MFECs for H2O2EP, exploring the construction of dual-doping configurations, heteroatom-defect coupling sites, and strategic dopant positioning to enhance H2O2EP efficiency; innovative structural tuning that improves interfacial reactant concentration and promote the timely release of H2O2; modulation of electrolyte and electrode interfaces to support the 2e pathways; and the application of C-MFECs in reactors and integrated energy systems. Finally, the current challenges and future directions in this burgeoning field are discussed.

Conflict of Interest

The authors declare no conflict of interest.

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