An inexpensive Ni-doped Co3O4 electrocatalyst for urea oxidation

Nagajyothi, P.C.; Ramaraghavulu, R.; Yoo, Kisoo; Pavani, K.; Shim, Jae‐Jin

doi:10.1016/j.colsurfa.2021.128101

Cited by 23 publications

(12 citation statements)

References 45 publications

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“…As shown in Figure and Figure S5 (Supporting Information), with different reaction times, the components of products can be varied, which are all composed of Co, Cl, N, C, and O (Figure S6, Supporting Information). For the sample with reaction time of 3 h, the bimodal value of 780.49 and 796.58 eV corresponds to the valence of Co 2+ , indicating that CoCl 2 and CO 2 did not interact significantly after 3 h. [ 15 ] However, after the reaction for 6 h, the valence of a small amount of Co changes, while the bimodal position of cobalt bimodal does not change, and the bimodal position at 782.04 and 796.38 eV corresponds to the characteristic peak of Co 3 O 4 (Figure 3b). Co 3 O 4 is actually a mixed oxidation state of Co(II) and Co(III), corresponding to the +2 and +3 states.…”

Section: Resultsmentioning

confidence: 99%

2D Heterostructure of CoCl₂/Co₃O₄ Built for Strong Enhanced Magnetism

Zhang,

Gao

et al. 2023

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As a remarkable structure, 2D magnetic heterojunctions have attracted researchers’ attention owing to their controlled manipulation in the electronic device. However, successful fabrication as well as modulation of their structure and compound remain challenging. Herein, a novel method is designed to obtain a CoCl2/Co3O4 heterojunction on Si/SiO2 substrate with the assistance of supercritical CO2 (SC CO2), and the as‐fabricated sample has significantly increased coercivity and saturation magnetization, which is 11 times higher than pure Co3O4. Further, it can be found that the CO2 pressure has the decisive effect on the saturation magnetization of the sample. Therefore, it suggests that the tunable electronic‐magnetic device can be anticipated to be obtained in the future.

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Section: Resultsmentioning

confidence: 99%

2D Heterostructure of CoCl₂/Co₃O₄ Built for Strong Enhanced Magnetism

Zhang,

Gao

et al. 2023

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“…Theoretical calculations indicated that appropriate doping of Zn ions enhances the density of states of p electrons on the catalyst surface and facilitates the d‐band center moving closer to the Fermi energy level, which accelerates the charge transfer rate and optimizes the adsorption free energy for reaction intermediates, eventually enhancing the intrinsic electrocatalytic activity to a large extent. Flaky and spherical NiMn 2 O 4 grown on Ni foams were successfully constructed by microwave synthesis at 150 °C and 175 °C, respectively [91] . Both differently shaped NiMn 2 O 4 catalysts possess low OER overpotentials under alkaline conditions as well as exhibit excellent catalytic performance, which promotes the development of low‐cost and high‐performance electrocatalysts without binders.…”

Section: Fundamental Spinel‐type Electrocatalysts In Lobsmentioning

confidence: 99%

“…Flaky and spherical NiMn 2 O 4 grown on Ni foams were successfully constructed by microwave synthesis at 150 °C and 175 °C, respectively. [91] Both differently shaped NiMn 2 O 4 catalysts possess low OER overpotentials under alkaline conditions as well as exhibit excellent catalytic performance, which promotes the development of low-cost and high-performance electrocatalysts without binders.…”

Section: Mn-based Spinelsmentioning

confidence: 99%

Modulation Strategies and Activity Descriptors of Spinel Electrocatalysts for Lithium−Oxygen Batteries

Pan,

Xu,

et al. 2024

Batteries & Supercaps

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The exploitation of high energy density lithium‐oxygen batteries (LOBs) holds significant importance for energy storage and applications. An efficient cathode catalyst can effectively prevent the accumulation of the insulating insoluble discharge product Li2O2, thereby enhancing the electrochemical performance. Spinel materials, widely available and cost‐effective, exhibit superior catalytic activity, making them ideal candidates for LOBs cathode catalysts. This review aims to offer a comprehensive and insightful overview of the recent progress in the design of spinel‐type electrocatalysts for LOBs. This review exhaustively summarizes various modification strategies applied to spinel materials and emphasizes the influential role of catalytic descriptors in designing highly active spinel‐type catalysts. This review provides guidance for the design and utilization of high‐performance spinel‐type catalysts, thereby contributing to the dynamic development of LOBs.

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“…2) Enhancing Intrinsic Catalytic Activity: Another direction focuses on the modification of catalytic active sites and electronic states of the catalyst. [27,[39][40][41][42][43][44][45][46] This modification can increase the inherent catalytic activity, allowing the catalyst to initiate the reaction more efficiently under practical operating conditions. 3) Improving Catalyst Dispersibility and Electrolyte Interfacial Resistance: The third approach aims to improve the dispersibility of the catalyst and reduce the interfacial resistance between the catalyst and the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Transition Metal‐Based Catalysts for Urea Oxidation Reaction (UOR): Catalyst Design Strategies, Applications, and Future Perspectives

Xu,

Ruan,

Ganesan

et al. 2024

Adv Funct Materials

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Urea oxidation reaction (UOR) has garnered significant attention in recent years as a promising and sustainable clean‐energy technology. Urea‐containing wastewater poses severe threats to the environment and human health. Numerous studies hence focus on developing UOR as a viable process for simultaneously remediating wastewater and converting it into energy. Moreover, UOR, which has a thermodynamic potential of 0.37 V (vs reversible hydrogen electrode, RHE), shows great promise in replacing the energy‐intensive oxygen evolution reaction (OER; 1.23 V vs RHE). The versatility and stability of urea, particularly at ambient temperatures, make it an attractive alternative to hydrogen in fuel cells. Since UOR entails a complex intermediate adsorption/desorption process, many studies are devoted to designing cost‐effective and efficient catalysts. Notably, transition metal‐based materials with regulated d orbitals have demonstrated significant potential for the UOR process. However, comprehensive reviews focusing on transition metal‐based catalysts remain scarce. In light of this, the review aims to bridge the gap by offering an in‐depth and systematic overview of cutting‐edge design strategies for transition metal‐based catalysts and their diverse applications in UOR. Additionally, the review delves into the status quo and future directions, charting the course for further advancements in this exciting field.

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An inexpensive Ni-doped Co3O4 electrocatalyst for urea oxidation

Cited by 23 publications

References 45 publications

2D Heterostructure of CoCl₂/Co₃O₄ Built for Strong Enhanced Magnetism

2D Heterostructure of CoCl₂/Co₃O₄ Built for Strong Enhanced Magnetism

Modulation Strategies and Activity Descriptors of Spinel Electrocatalysts for Lithium−Oxygen Batteries

Transition Metal‐Based Catalysts for Urea Oxidation Reaction (UOR): Catalyst Design Strategies, Applications, and Future Perspectives

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An inexpensive Ni-doped Co3O4 electrocatalyst for urea oxidation

Cited by 23 publications

References 45 publications

2D Heterostructure of CoCl2/Co3O4 Built for Strong Enhanced Magnetism

2D Heterostructure of CoCl2/Co3O4 Built for Strong Enhanced Magnetism

Modulation Strategies and Activity Descriptors of Spinel Electrocatalysts for Lithium−Oxygen Batteries

Transition Metal‐Based Catalysts for Urea Oxidation Reaction (UOR): Catalyst Design Strategies, Applications, and Future Perspectives

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2D Heterostructure of CoCl₂/Co₃O₄ Built for Strong Enhanced Magnetism

2D Heterostructure of CoCl₂/Co₃O₄ Built for Strong Enhanced Magnetism