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Mesoporous Co-O-C nanosheets for electrochemical production of hydrogen peroxide in acidic medium

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dc.contributor.authorJing, L.
dc.contributor.authorTian, Q.
dc.contributor.authorSu, P.
dc.contributor.authorLi, H.
dc.contributor.authorZheng, Y.
dc.contributor.authorTang, C.
dc.contributor.authorLiu, J.
dc.date.issued2022
dc.description.abstractThe electrochemical two-electron oxygen reduction reaction (2e− ORR) for the production of hydrogen peroxide (H2O2) enables a promising electro-Fenton process for on-site and on-demand environmental remediation. However, there is still a lack of low-cost electrocatalysts for efficient H2O2 electrosynthesis, particularly in acidic media. Herein, we designed and synthesized cobalt species incorporated in oxygen-rich mesoporous carbon nanosheets (MesoC-Co), resulting in electrochemical H2O2 production with a selectivity above 80% over a wide potential range in 0.10 M HClO4. In our reported electrocatalysts, atomic Co sites contribute to the high ORR activity of carbon-based materials in an acidic medium, and the oxygen-containing functional groups and mesoporous structure endow the catalysts with high H2O2 selectivity. The ORR current density over MesoC-Co with uniform mesopores and well-defined Co species reaches −1 mA cm−2 at 0.4 V versus reversible hydrogen electrode with very good durability. In addition, the cumulative concentration of H2O2 is 7.2 mmol L−1 within 24 h, allowing for the effective electro-Fenton degradation of organic pollutants. Our results might shed light on the design of catalytic systems for sustainable electro-Fenton processes.
dc.description.statementofresponsibilityLingyan Jing, Qiang Tian, Panpan Su, Haitao Li, Yao Zheng, Cheng Tang Jian Liu
dc.identifier.citationJournal of Materials Chemistry A, 2022; 10(8):4068-4075
dc.identifier.doi10.1039/d1ta10416k
dc.identifier.issn2050-7488
dc.identifier.issn2050-7496
dc.identifier.orcidZheng, Y. [0000-0002-2411-8041]
dc.identifier.orcidTang, C. [0000-0002-5167-1192]
dc.identifier.urihttps://hdl.handle.net/2440/134482
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.relation.granthttp://purl.org/au-research/grants/arc/DE220101365
dc.rightsThis journal is © The Royal Society of Chemistry 2022
dc.source.urihttps://doi.org/10.1039/d1ta10416k
dc.titleMesoporous Co-O-C nanosheets for electrochemical production of hydrogen peroxide in acidic medium
dc.typeJournal article
pubs.publication-statusPublished

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