Jul 2026· ACS Applied Materials and Interfaces· Vol 18 31, pp.
42705-42711
· 0 citations· 32 references
Medicine
Abstract
Electrochemical two-electron oxygen reduction reaction (2e--ORR) offers a sustainable route for green synthesis of hydrogen peroxide (H2O2). The development of relevant nonprecious metal catalysts with high performance and low cost is critical. Herein, we report a cobalt-centered Keggin-type polyoxometalate supported on amino-functionalized carbon nanotubes (Co-POM@NH2-CNTs), which functioned as an efficient 2e--ORR catalyst to deliver a H2O2 selectivity of 92%, a current density over 100 mA cm-2, and a production rate of 5 mol gcat-1 h-1 in a flow cell. Mechanistic studies combining electrochemical analysis, Pourbaix diagrams, and DFT calculations reveal that the Co3+/Co2+ redox mediated electrocatalysis, with Co2+ sites properly stabilizing O2 and *OOH via a Pauling-type adsorption mode, which facilitated the 2e--ORR pathway. This work highlights the critical influence of adsorption geometry on selectivity and positions Co-POM@NH2-CNTs as a potential catalyst for sustainable H2O2 synthesis.
High efficiency and durable non-noble-metal electrocatalysts for the hydrogen evolution reaction (HER) are essential for large-scale green hydrogen production. In this work, a trimetallic polyoxometalate (POM) precursor H2[Co(NH3)6]2[CeMo12O42] (Co2CeMo12) was synthesized via the self-assembly of POM. Subsequently,...
Pingfan Wu, Xiao Feng, Sizhan Shu et al.· Polyoxometalates· 0 citations
Cobalt-based catalysts have been reported to electrocatalyze the oxidation of 5-hydroxymethylfurfural (HMFOR) to high-value-added chemicals. However, generating highly active Co3+OOH at low potential remains a grand challenge. In this paper, we describe the electronegative metal-doped cobalt metal-organic frameworks...
Gui-Xiang Li, Gang Jin, Chen-Jing Wang et al.· ACS Catalysis· 0 citations
The two-electron oxygen reduction reaction (2e− ORR) presents a promising route for the on-site production of hydrogen peroxide (H2O2), offering a green alternative to energy-consuming anthraquinone process. However, the high selectivity toward the competing 4e− ORR over the desired 2e− pathway leads to low Faradaic ef...
Xiao Huang, Zi-Hao Zhan, Hao-Xu Niu et al.· Journal of Electrochemistry· 0 citations
The electrochemical two-electron oxygen reduction reaction (2e– ORR) offers a sustainable route for H2O2 synthesis, yet developing nonprecious-metal catalysts with high activity and selectivity remains challenging. Herein, Ar plasma etching is employed to controllably introduce oxygen vacancies into NiO. Structural c...
Fei-Hong Yang, Xin-Ru Ji, Jing-Cheng Zhang et al.· Langmuir· 0 citations
The high-efficiency electrosynthesis of hydrogen peroxide (H2O2) via two-electron oxygen reduction reaction (2e- ORR) represents a promising alternative to the traditional anthraquinone process. However, achieving high selectivity, industrial-grade stability, and on-site utilization of H2O2 remains a significant challe...
Hongnan Du, Hui-Juan Jing, Bo Zhang et al.· Angewandte Chemie· 0 citations
The electrocatalytic reduction of CO2 to value-added chemicals leads to a combined solution to address carbon dioxide emission and the demand for sustainable energy storage. Although metal catalysts have dominated and defined a benchmark in the field of electrochemical CO2 reduction (CO2RR), recent research has shifted...
Gargi Dey, Adil Fayaz, Muthu Austeria P et al.· ACS Applied Materials and In...· 0 citations
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