Three-dimensional interlinked Co3O4-CNTs hybrids as novel oxygen electrocatalyst

Shen, Jing; Gao, Juan; Ji, Liudi; Chen, Xuerong; Wu, Chuanfang

doi:10.1016/j.apsusc.2019.143818

Cited by 46 publications

(25 citation statements)

References 28 publications

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“…Co 2+ is generally considered as the active site of OER for the generation of active species CoOOH at the anode potential, which contributes to the formation of oxygen-containing intermediate *OOH and accelerates the kinetic rate of OER. 48 Many studies show oxygen vacancies to promote the OER activity of transition oxides by significantly affect the properties of electronic structure and conductivity. Oxygen vacancies are reported to reduce the oxygen evolution energy barrier and promote Co 2+ oxidation into CoOOH at the initial steps.…”

Section: Resultsmentioning

confidence: 99%

High‐performance Te‐doped Co ₃ O ₄ nanocatalysts for oxygen evolution reaction

Yin

et al. 2021

Intl J of Energy Research

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To reduce the overpotential of electrocatalytic oxygen evolution reaction (OER) for high-efficiency water splitting, a series of 2 to 5 nm ultrafine spinel Co 3 O 4 nanoparticles (NPs) with varied amount of lattice-doped Te (XTe-Co 3 O 4 , X represents the nominal molar ratio Te/Co of 0, 2, 4, 6, 8%) as catalysts were prepared through a simple hydrothermal synthesis method. The 6% Te-Co 3 O 4 catalyst was optimized to obtain the overpotential as low as 313 mV at 10 mA cm À2 , a small Tafel slope of 75 mV dec À1 in 1 M KOH for OER, outperforming this series and many reported Co 3 O 4 -based catalysts. Te doping introduced lattice distortion and resulted in smaller size of Te-Co 3 O 4 NPs with enlarged surface area for more accessible active sites. Oxygen vacancies were created to modify the electronic structure, improve the active sites density, and decrease the kinetic energy barriers of XTe-Co 3 O 4 . The electronic conductivity of 6%Te-Co 3 O 4 was improved to accelerate the charge transfer efficiency. All these effects contributed to promoting the reaction kinetics and minimizing the OER overpotentials for high-performance electrocatalysis.

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Section: Resultsmentioning

confidence: 99%

High‐performance Te‐doped Co ₃ O ₄ nanocatalysts for oxygen evolution reaction

Yin

et al. 2021

Intl J of Energy Research

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“…This enhancement of electrocatalytic performance has been ascribed to the synergistic effect for Ir−Pt composite catalysts in OER mechanism. In case of IrO 2 @MWCNT‐450 °C and IrO 2 @MWCNT‐500 °C, the IrO 2 nanoparticles agglomerated gradually at higher calcination temperatures, which reduce the OER catalytic activity [35–37] . The decrease of the activity should be related to fewer electrochemical surface area of the catalysts at higher temperature.…”

Section: Resultsmentioning

confidence: 99%

Platinum Nanoparticles Decorated IrO₂@MWCNT as an Improved Catalyst for Oxygen Evolution Reaction

et al. 2021

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In this paper, IrO2 nanoparticles supported on multi‐walled carbon nanotubes (MWCNTs) are synthesized via a facile hydrothermal method and calcination process at different temperature. Platinum nanoparticles decorated IrO2@MWCNT‐400 °C are prepared by chemical reduction method. The influence of MWCNTs and Pt on physicochemical properties and oxygen evolution reaction (OER) activity of IrO2@MWCNT composites were studied via transmission electron microscope (TEM), X‐ray diffraction (XRD), Raman spectra, thermogravimetric analysis (TGA), X‐ray photoelectron spectroscopic (XPS) and electrochemical methods. Among the samples, Pt/IrO2@MWCNT‐400 °C exhibits better catalytic activity with an overpotential of 270 mV at the current density of 10 mA cm−2 with a low Tafel slope of 85.1 mV dec−1. The outstanding OER performance of Pt/IrO2@MWCNT‐400 °C is ascribed to the introduction of the MWCNTs, which can not only act as a support to prevent agglomeration of IrO2 nanoparticles that produces high surface area of catalytic sites, but also facilitates electron transfer between IrO2 nanoparticles and MWCNTs. On the other hand, the Pt optimizes electronic structure for excellent electrocatalytic performance. Therefore, the Pt/IrO2@MWCNT‐400 °C catalyst is a good choice for application in OER.

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“…Cobalt oxide-based materials, such as Co 3 O 4 -CNTs, Co 3 O 4 nanosheets, Co 3 O 4 nanoflowers, and Co 3 O 4 nanorods, have been used as efficient catalysts in Li–O 2 batteries. − Considering that the Co 2+ in Co 3 O 4 is poisonous and hazardous, some environmentally friendly metal ions (M = Fe, Zn, Mn, and Ni) were used to replace it. Liu et al reported a type of porous ZnCo 2 O 4 nanorodlike structures with multiwalled CNTs (ZnCo 2 O 4 @CNT) as a cathode material.…”

Section: Catalytic Cathode Design For Li–co2 Batteriesmentioning

confidence: 99%

Recent Advances in Rechargeable Li–CO₂ Batteries

Sun

Hou

et al. 2021

Energy Fuels

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Li−CO 2 batteries have attracted increasing attention recently due to their high discharging voltage (∼2.8 V) and large theoretical specific energy (1876 Wh kg −1 ). The conversion of CO 2 relieves its detrimental impact effect on the environment. Despite the aforementioned superiorities, practical Li−CO 2 batteries are still restricted by some issues, such as intricate multiphase interfacial reactions and intrinsic insulating characteristics of carbonate products. Here, reaction mechanisms based on CO 2 conversion reaction are summarized. Updated research achievements about catalytic cathodes and electrolyte systems are reviewed and discussed. Critical scientific issues and innovative perspectives are presented for Li−CO 2 electrochemistry. This review provides an overall recognition for the latest Li− CO 2 system and indicates the potential evolutions for the next-generation energy storage system.

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Three-dimensional interlinked Co3O4-CNTs hybrids as novel oxygen electrocatalyst

Cited by 46 publications

References 28 publications

High‐performance Te‐doped Co ₃ O ₄ nanocatalysts for oxygen evolution reaction

High‐performance Te‐doped Co ₃ O ₄ nanocatalysts for oxygen evolution reaction

Platinum Nanoparticles Decorated IrO₂@MWCNT as an Improved Catalyst for Oxygen Evolution Reaction

Recent Advances in Rechargeable Li–CO₂ Batteries

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Three-dimensional interlinked Co3O4-CNTs hybrids as novel oxygen electrocatalyst

Cited by 46 publications

References 28 publications

High‐performance Te‐doped Co 3 O 4 nanocatalysts for oxygen evolution reaction

High‐performance Te‐doped Co 3 O 4 nanocatalysts for oxygen evolution reaction

Platinum Nanoparticles Decorated IrO2@MWCNT as an Improved Catalyst for Oxygen Evolution Reaction

Recent Advances in Rechargeable Li–CO2 Batteries

Contact Info

Product

Resources

About

High‐performance Te‐doped Co ₃ O ₄ nanocatalysts for oxygen evolution reaction

High‐performance Te‐doped Co ₃ O ₄ nanocatalysts for oxygen evolution reaction

Platinum Nanoparticles Decorated IrO₂@MWCNT as an Improved Catalyst for Oxygen Evolution Reaction

Recent Advances in Rechargeable Li–CO₂ Batteries