Highly coordinative molecular cobalt–phthalocyanine electrocatalyst on an oxidized single-walled carbon nanotube for efficient hydrogen peroxide production

Li, Yaoxin; Cheng, Haoying; Wang, Meilin; Xu, Jiaoxing; Guan, Lunhui

doi:10.1039/d3mh02142d

Mater. Horiz.

2024

DOI: 10.1039/d3mh02142d

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Highly coordinative molecular cobalt–phthalocyanine electrocatalyst on an oxidized single-walled carbon nanotube for efficient hydrogen peroxide production

Yaoxin Li,

Haoying Cheng,

Meilin Wang

et al.

Abstract: H2O2 production by two-electron oxygen reduction reaction (2e- ORR) offers a potential alternative to the current anthraquinone method due to its efficiency and environmental friendliness. However, the structure of electrocatalysts...

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Cited by 3 publications

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Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Xue,

Li,

Sun

et al. 2024

Angewandte Chemie

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The electrochemical synthesis of hydrogen peroxide from oxygen and water, powered by renewable electricity, provides a highly attractive alternative to the energy‐intensive autoxidation process presently used in industry, but much remains unknown about this two‐electron oxygen reduction reaction (2e‐ORR), especially the local proton effect. Here, we have investigated the function of hydrogen‐associated intermediates in the 2e‐ORR using a rationally designed cooperative electrode material with cobalt (II) clusters embedded onto the oxidized carbon nanotube composites (Co‐OCNT). We found that the local proton availability can determine both the reaction kinetics and selectivity. A 2e‐ORR process involving hydrogen radical transfer is confirmed. Specifically, the carbon sites from the OCNTs promote proton production, and the cobalt sites from the Co cluster facilitate ORR intermediate formation. The high local proton availability and the cooperative dual‐active sites both contribute to the superior reaction kinetics and selectivity of the Co‐OCNT, reaching an H2O2 production rate of ~13.4 mol gcat‐1 h‐1 and a faradaic efficiency of 90% at a current density of 100 mA cm‐2. Further cascading the 2e‐ORR with the electro‐Fenton process shows a high selectivity of oxalic acid up to 97% for the valorization of ethylene glycol.

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Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Xue,

Li,

Sun

et al. 2024

Angewandte Chemie

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Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Xue,

Li,

Sun

et al. 2024

Angew Chem Int Ed

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Investigating the effect of Fe–N₅ configuration in the oxygen reduction reaction using N-heterocycle functionalized carbon nanotubes

Li,

Zhao,

Pedersen

et al. 2024

J. Mater. Chem. A

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Highly coordinative molecular cobalt–phthalocyanine electrocatalyst on an oxidized single-walled carbon nanotube for efficient hydrogen peroxide production

Abstract: H2O2 production by two-electron oxygen reduction reaction (2e- ORR) offers a potential alternative to the current anthraquinone method due to its efficiency and environmental friendliness. However, the structure of electrocatalysts...

Cited by 3 publications

References 55 publications

Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Investigating the effect of Fe–N₅ configuration in the oxygen reduction reaction using N-heterocycle functionalized carbon nanotubes

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Highly coordinative molecular cobalt–phthalocyanine electrocatalyst on an oxidized single-walled carbon nanotube for efficient hydrogen peroxide production

Abstract: H2O2 production by two-electron oxygen reduction reaction (2e- ORR) offers a potential alternative to the current anthraquinone method due to its efficiency and environmental friendliness. However, the structure of electrocatalysts...

Cited by 3 publications

References 55 publications

Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Hydrogen Radical Enabling Industrial‐Level Oxygen Electroreduction to Hydrogen Peroxide

Investigating the effect of Fe–N5 configuration in the oxygen reduction reaction using N-heterocycle functionalized carbon nanotubes

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Investigating the effect of Fe–N₅ configuration in the oxygen reduction reaction using N-heterocycle functionalized carbon nanotubes