Co3O4 nanosheets modified by Ni@C nanoparticles as effective flow-through electrode for electro-activation of PMS: Ni@C as electron shuttle for accelerated Co3+/Co2+ cycle in bulk Co3O4

Cheng, Song; Liu, Yutao; Liu, Xinyi; Zhu, Changqing; Luo, Jingyang; Cao, Jiashun; Liu, Fuqiang

doi:10.1016/j.cej.2023.145084

Chemical Engineering Journal

2023

DOI: 10.1016/j.cej.2023.145084

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Co3O4 nanosheets modified by Ni@C nanoparticles as effective flow-through electrode for electro-activation of PMS: Ni@C as electron shuttle for accelerated Co3+/Co2+ cycle in bulk Co3O4

Song Cheng,

Yutao Liu,

Xinyi Liu

et al.

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Cited by 17 publications

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Tuning of Oxygen Vacancies in Co₃O₄ Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting

Mannu,

Dharman,

Nga

et al. 2024

Small

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The development of an excellent multifunctional electrocatalyst that is based on non‐precious metal is critical for improving the electrochemical processes of the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the urea oxidation reaction (UOR) in alkaline media. This study demonstrates that incorporating Mo into Co3O4 facilitated the formation of rich oxygen vacancies (Vo), which promotes effective nitrate adsorption and activation in urea electrolysis. Subsequently, in situ/operando X‐ray absorption spectroscopy is used to explore the active sites in Mo‐Co3O4‐3 under OER, indicating the oxygen vacancies are first filled with OH• in Mo‐Co3O4; facilitated the pre‐oxidation of low‐valence Co, and promoted the reconstruction/deprotonation of intermediate Co‐OOH•. Mo‐Co3O4‐3 electrocatalysts show impressive HER, OER, and UOR with low overpotentials of 141 mV, 220 mV, and 1.32 V, respectively, at 10 mA cm−2 in an alkaline medium. Furthermore, in situ/Operando Raman spectroscopy results reveal the importance of CoOOH active sites for enhanced electrochemical performance in Mo‐Co3O4‐3 compared to the pure Co3O4. The urea electrolyzer with Mo‐Co3O4 electrocatalysts acts as an anode and the cathode delivers 1.42 V at 10 mA cm−2. A viable approach to creating effective UOR electrocatalysts involves synergistic engineering exploiting doping and oxygen vacancies.

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Tuning of Oxygen Vacancies in Co₃O₄ Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting

Mannu,

Dharman,

Nga

et al. 2024

Small

View full text Add to dashboard Cite

show abstract

Facile fabrication of shape-controllable and reusable nanoporous catalytic aerogels based on Co-MOF and agarose for efficient decomposition of organic pollutants in water

Yoon,

Park,

Jang

et al. 2024

Carbohydrate Polymers

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Monodispersed Co-N3 loaded carbon nitride mediated peroxymonosulfate activation for rapid degradation of trace urea via singlet oxygen

Jiang,

Cheng,

Cao

et al. 2024

Chemical Engineering Journal

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Co3O4 nanosheets modified by Ni@C nanoparticles as effective flow-through electrode for electro-activation of PMS: Ni@C as electron shuttle for accelerated Co3+/Co2+ cycle in bulk Co3O4

Cited by 17 publications

References 46 publications

Tuning of Oxygen Vacancies in Co₃O₄ Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting

Tuning of Oxygen Vacancies in Co₃O₄ Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting

Facile fabrication of shape-controllable and reusable nanoporous catalytic aerogels based on Co-MOF and agarose for efficient decomposition of organic pollutants in water

Monodispersed Co-N3 loaded carbon nitride mediated peroxymonosulfate activation for rapid degradation of trace urea via singlet oxygen

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Co3O4 nanosheets modified by Ni@C nanoparticles as effective flow-through electrode for electro-activation of PMS: Ni@C as electron shuttle for accelerated Co3+/Co2+ cycle in bulk Co3O4

Cited by 17 publications

References 46 publications

Tuning of Oxygen Vacancies in Co3O4 Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting

Tuning of Oxygen Vacancies in Co3O4 Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting

Facile fabrication of shape-controllable and reusable nanoporous catalytic aerogels based on Co-MOF and agarose for efficient decomposition of organic pollutants in water

Monodispersed Co-N3 loaded carbon nitride mediated peroxymonosulfate activation for rapid degradation of trace urea via singlet oxygen

Contact Info

Product

Resources

About

Tuning of Oxygen Vacancies in Co₃O₄ Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting

Tuning of Oxygen Vacancies in Co₃O₄ Electrocatalyst for Effectiveness in Urea Oxidation and Water Splitting