Vacancy and strain engineering of Co3O4 for efficient water oxidation

Guo, Jinyu; Wang, Guangjin; Cui, Shasha; Xia, Bingying; Liu, Zhijuan; Zang, Shuang‐Quan

doi:10.1016/j.jcis.2022.08.160

Cited by 11 publications

(6 citation statements)

References 69 publications

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“…TiO 2 /Co 3 O 4 shows the average O 2 evolution rate of 1993.1 μmol g –1 h –1 that is the highest. Co 3 O 4 has been widely reported as an effective water oxidation catalyst that involves the cycling of Co II /Co III and Co III /Co IV active species . It is expected that TiO 2 /Co 3 O 4 exhibits an excellent photocatalytic activity for the evolution of O 2 .…”

Section: Resultsmentioning

confidence: 99%

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Hao,

Tian,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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TiO 2 -based two-dimensional nanosheet composite materials are promising photocatalysts for water splitting. The mesoporous structure possesses a high surface-to-volume ratio with more active sites. It is fantastic for photocatalysts to integrate the advantages of a porous structure into two-dimensional materials. The calcined ultrathin layered double hydroxides (LDHs) are porous metal oxide nanosheets, which are considered ideal templates to construct photocatalysts. In this work, we report the design and fabrication of amorphous aluminum oxide-supported anatase TiO 2 /spinel Co 3 O 4 (TiO 2 /Co 3 O 4 ) mesoporous nanosheets by calcinating ultrathin TiO 2 /CoAl-LDH precursors. The built-in electric field in the TiO 2 /Co 3 O 4 interface facilitates the charge transfer, and Co 3 O 4 acts as a cocatalyst to further enhance the oxygen evolution reaction activity. Consequently, the TiO 2 /Co 3 O 4 photocatalyst exhibits excellent photocatalytic performances for the evolution of O 2 and H 2 . This strategy for preparing mesoporous nanosheet photocatalysts is expected to extend to the other metal oxide semiconductor systems.

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Section: Resultsmentioning

confidence: 99%

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Hao,

Tian,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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“…), [46] which all play a significant role in regulating the structure of catalysts. The common point defects in spinels are heteroatoms (Figure 1a) (foreign metal such as Fe, [47] Ni, [48] Cu, [49] Mn, [50] Ce, [51] Zn, [52] Cr, [53] V, [54] Zr, [55] Ru, [56] Ir, [57] etc. [58] and non-metal elements such as C, [59] N, [60] P, [26] F, [61] S, [62] Se, [63] etc.…”

Section: The Defects In Spinelsmentioning

confidence: 99%

Electrocatalytic Mechanism of Defect in Spinels for Water and Organics Oxidation

Liu

Kong

Cui

et al. 2023

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Spinels display promising electrocatalytic ability for oxygen evolution reaction (OER) and organics oxidation reaction because of flexible structure, tunable component, and multifold valence. Unfortunately, limited exposure of active sites, poor electronic conductivity, and low intrinsic ability make the electrocatalytic performance of spinels unsatisfactory. Defect engineering is an effective method to enhance the intrinsic ability of electrocatalysts. Herein, the recent advances in defect spinels for OER and organics electrooxidation are reviewed. The defect types that exist in spinels are first introduced. Then the catalytic mechanism and dynamic evolution of defect spinels during the electrochemical process are summarized in detail. Finally, the challenges of defect spinel electrocatalysts are brought up. This review aims to deepen the understanding about the role and evolution of defects in spinel for electrochemical water/organics oxidation and provide a significant reference for the design of efficient defect spinel electrocatalysts.

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“…19 In contrast, enhancement of the adsorption of reaction intermediates was achieved by comodulation of metal vacancies and tensile strain, leading to the upshift of the E d of metal Co toward that of Co 3 O 4 . 20 Moreover, a rule was reported regarding defect evolution in NiFe LDH, a kind of layered material, composed of a laminate with positive charges of octahedral sites MO 6 (M = Ni or Fe) and anions as intermediate equilibrium charges between the layers of the laminate. [21][22][23] This revealed that the V MOH-H (M = Ni or Fe), the final product of defect evolution, is a crucial factor in modulating the free energy of oxygenated intermediates toward improving OER dynamics.…”

Section: Introductionmentioning

confidence: 99%

Cationic defect-enriched hydroxides as anodic catalysts for efficient seawater electrolysis

Zhao

Zheng

et al. 2023

Inorg. Chem. Front.

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Vacancy and strain engineering of Co3O4 for efficient water oxidation

Cited by 11 publications

References 69 publications

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Electrocatalytic Mechanism of Defect in Spinels for Water and Organics Oxidation

Cationic defect-enriched hydroxides as anodic catalysts for efficient seawater electrolysis

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Vacancy and strain engineering of Co3O4 for efficient water oxidation

Cited by 11 publications

References 69 publications

Preparation of Mesoporous TiO2/Co3O4 Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Preparation of Mesoporous TiO2/Co3O4 Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Electrocatalytic Mechanism of Defect in Spinels for Water and Organics Oxidation

Cationic defect-enriched hydroxides as anodic catalysts for efficient seawater electrolysis

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Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution