Snowflake Co3O4-CuO heteroanode arrays supported on three-dimensional framework for enhanced oxygen evolution

Nguyen, Chinh‐Chien; Nguyen, Van‐Huy; Tuyen, P.N.K.; Pham, Thong Le Minh; Vu, Thien Y

doi:10.1016/j.jelechem.2020.114235

Cited by 12 publications

(7 citation statements)

References 71 publications

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“…Moreover, the CuO/Co 3 O 4 /NF reaches a high-current density of 100 mA cm –2 at a lower η O2 of 320 mV. The enhanced OER catalytic performance of the CuO/Co 3 O 4 composite could be due to the synergistic interaction between Cu and Co oxides. , Moreover, the plate and sphere-like morphology of the CuO/Co 3 O 4 composite provides more surface area for the electrocatalytic reaction, and the presence of the CuO provides sufficient electronic conductivity throughout the electrocatalytic process. Further, CuO/Co 3 O 4 /NF out-performs those of previously reported (Table S2) Co 3 O 4 -based OER catalysts. − This implies that compared to a single metal oxide nanostructure, the metal oxide composite nanostructure enhances the electrocatalytic performance.…”

Section: Resultsmentioning

confidence: 97%

“…In this regard, earth-abundant TMOs, particularly Cu, Co-based catalysts, emerged as practical alternatives for OER due to their low-cost, high electrocatalytic activity, and stability in alkaline solution. However, their electrocatalytic activity and durability are still inefficient in competing with precious metal oxides under industrial conditions …”

Section: Introductionmentioning

confidence: 99%

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Heterostructure CuO/Co₃O₄ Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Balasundari¹,

Jayasubramaniyan

Thangavel

et al. 2023

ACS Appl. Eng. Mater.

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Earth-abundant transition metal oxides (TMOs) are promising electroactive materials for electrochemical energy conversion and storage applications due to their high theoretical specific capacity, enhanced electrocatalytic activity, and mechanical durability. However, the limited cycle stability and low conductivity of TMOs remain challenging for practical application. Herein, we developed a TMO-based nanocomposite of CuO/Co 3 O 4 via precipitation followed by the microwave hydrothermal method and used as a bifunctional electroactive material for supercapacitor and oxygen evolution reaction (OER) applications. The CuO/Co 3 O 4 nanocomposite electrode exhibits a high specific capacity of 586 C g −1 and an excellent cyclic reversibility of 113.6% under a high current density of 20 A g −1 after 5000 cycles. Apart from the high redox properties, the strong synergistic interaction between CuO and Co 3 O 4 significantly enhances the electrocatalytic property of the material. On continuous electrolysis in 1 M KOH solution, the OER electrode fabricated with CuO/Co 3 O 4 nanocomposite demonstrated a moderate overpotential (η O2 ) of 270 mV at j = 10 mA cm −2 , a slight Tafel slope of 54 mV dec −1 , and significant OER stability. These results highlight the fabrication of high-performance TMOs-based CuO/Co 3 O 4 nanocomposite and their utilization in electrochemical energy storage and conversion devices for attaining maximum efficiency.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Heterostructure CuO/Co₃O₄ Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Balasundari¹,

Jayasubramaniyan

Thangavel

et al. 2023

ACS Appl. Eng. Mater.

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“…Besides, the Co 3 O 4 -CuO snowflakes have high stability and durability as oxygen evolution reaction electrocatalysts. 20 Based on the above discussion, we expect that CuO/Co 3 O 4 heterojunction nanomaterials can have good electrocatalytic methanol oxidation performance. Considering the wide application of heterojunction structure in the field of photocatalysis, Sun et al 21 have designed a Co 3 O 4 @NP-CuO composite, which exhibits excellent photodegradation performance against RhB.…”

Section: Introductionmentioning

confidence: 87%

“…Electrocatalysts with heterojunction structures composed of two or more transition metal oxides possess the catalytic properties of each component, and it has more excellent catalytic performance. − Therefore, heterojunction catalysts have been widely used in the field of catalysts. , For example, the CuO/Co 3 O 4 synthesized by Xu et al shows better catalytic activity and stability in toluene oxidation. Besides, the Co 3 O 4 -CuO snowflakes have high stability and durability as oxygen evolution reaction electrocatalysts . Based on the above discussion, we expect that CuO/Co 3 O 4 heterojunction nanomaterials can have good electrocatalytic methanol oxidation performance.…”

Section: Introductionmentioning

confidence: 88%

Enhanced Performance of Porphyrin-Modified CuO-Co₃O₄ Heterojunction as a Photoelectrocatalyst for Methanol Oxidation

Shu

Liu

et al. 2023

Langmuir

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It is desirable to improve the methanol oxidation ability of heterojunction catalysts because of their potential in the field of electrocatalysis. In this article, we have integrated CuO/Co 3 O 4 heterojunction with porphyrin (TCPP) for TCPP/Cu 2 Co 1 . The results demonstrate that the specific surface area and electrochemical active surface area (ECSA) are enhanced, and the unblocked separation and transfer of photogenerated charges are guaranteed by the matched band energy of CuO, Co 3 O 4 , and TCPP. As such, the photocatalytic methanol oxidation reaction (MOR) performance and stability of TCPP/Cu 2 Co 1 are significantly enhanced compared with those of Cu 2 Co 1 . This study provides a promising pathway for the design of MOR catalysts with high MOR activity.

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“…For example, a snowflake shaped Co 3 O 4 -CuO electrocatalyst was synthesized by Nguyen and team for OER process. [30] Co 3 O 4 is a well-recognized nanoparticle for its excellent conductivity and ability to form in various morphologies such as nanosheets, nanowires and nanorods. Thus, the formation of Co 3 O 4 as a shell layer surrounding CuO fabricated on copper foam is a promising strategy to further enhance its electrochemical activity.…”

Section: Metal Oxides Based Electrocatalystsmentioning

confidence: 99%

Transition Metals‐Based Water Splitting Electrocatalysts on Copper‐Based Substrates: The Integral Role of Morphological Properties

Selvanathan,

Meng Woi,

Selvanathan

et al. 2023

The Chemical Record

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Electrocatalytic water splitting is a promising alternative to produce high purity hydrogen gas as the green substitute for renewable energy. Thus, development of electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are vital to improve the efficiency of the water splitting process particularly based on transition metals which has been explored extensively to replace the highly active electrocatalytic activity of the iridium and ruthenium metals‐based electrocatalysts. In situ growth of the material on a conductive substrate has also been proven to have the capability to lower down the overpotential value significantly. On top of that, the presence of substrate has given a massive impact on the morphology of the electrocatalyst. Among the conductive substrates that have been widely explored in the field of electrochemistry are the copper based substrates mainly copper foam, copper foil and copper mesh. Copper‐based substrates possess unique properties such as low in cost, high tensile strength, excellent conductor of heat and electricity, ultraporous with well‐integrated hierarchical structure and non‐corrosive in nature. In this review, the recent advancements of HER and OER electrocatalysts grown on copper‐based substrates has been critically discussed, focusing on their morphology, design, and preparation methods of the nanoarrays.

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Snowflake Co3O4-CuO heteroanode arrays supported on three-dimensional framework for enhanced oxygen evolution

Cited by 12 publications

References 71 publications

Heterostructure CuO/Co₃O₄ Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Heterostructure CuO/Co₃O₄ Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Enhanced Performance of Porphyrin-Modified CuO-Co₃O₄ Heterojunction as a Photoelectrocatalyst for Methanol Oxidation

Transition Metals‐Based Water Splitting Electrocatalysts on Copper‐Based Substrates: The Integral Role of Morphological Properties

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Snowflake Co3O4-CuO heteroanode arrays supported on three-dimensional framework for enhanced oxygen evolution

Cited by 12 publications

References 71 publications

Heterostructure CuO/Co3O4 Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Heterostructure CuO/Co3O4 Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Enhanced Performance of Porphyrin-Modified CuO-Co3O4 Heterojunction as a Photoelectrocatalyst for Methanol Oxidation

Transition Metals‐Based Water Splitting Electrocatalysts on Copper‐Based Substrates: The Integral Role of Morphological Properties

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Heterostructure CuO/Co₃O₄ Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Heterostructure CuO/Co₃O₄ Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

Enhanced Performance of Porphyrin-Modified CuO-Co₃O₄ Heterojunction as a Photoelectrocatalyst for Methanol Oxidation