Heterostructured Photocatalysts for Water Splitting and the Interfacial Charge Transfer

Zheng, Yazhuo; Wang, Erpeng; Zhou, Jian; Sun, Zhimei

doi:10.1021/acsmaterialslett.4c00706

ACS Materials Lett.

2024

DOI: 10.1021/acsmaterialslett.4c00706

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Heterostructured Photocatalysts for Water Splitting and the Interfacial Charge Transfer

Yazhuo Zheng,

Erpeng Wang,

Jian Zhou

et al.

Abstract: Photocatalytic water splitting for hydrogen evolution has opened new possibilities for addressing global energy and environmental issues.

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Cited by 2 publications

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Highly selective photocatalytic oxidation of CH4 to CH3OH: A theoretical study

Wang,

Zheng,

Zhou

et al. 2024

Surfaces and Interfaces

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Highly selective photocatalytic oxidation of CH4 to CH3OH: A theoretical study

Wang,

Zheng,

Zhou

et al. 2024

Surfaces and Interfaces

View full text Add to dashboard Cite

One-Step Synthesis of TiO₂/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction

Liu,

Wang,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Transition metal compounds are abundant on Earth and are cost-effective materials. However, their inherent characteristics of low electrical conductivity and low electrocatalytic activity greatly limit their applications as electrocatalysts. In this study, we successfully synthesized TiO 2 /FeO(OH) nanocomposite materials rich in heterogeneous structures using a one-step hydrothermal method and obtained nanostructured TiO 2 /FeO(OH)-2 with excellent electrocatalytic oxygen evolution reaction (OER) performance by adjusting the ratio of Ti elements. The opposite charge regions at the heterojunction interface led to the reconstruction of the built-in electric field, accelerating electron transfer, optimizing the electronic structure during the catalytic reaction process, and ensuring the stability of surface charged active center sites in the heterojunction. Furthermore, in situ Raman measurements confirmed the crucial role of the built-in electric field in the electrocatalytic OER process of the TiO 2 /FeO(OH)-2 nano-heterostructure. The density functional theory calculations further confirmed the promotional effect of the heterogeneous interfaces constructed in TiO 2 /FeO(OH)-2 on the OER activity and also revealed that the intermediate *OOH is the rate-determining step of the OER reaction. The optimized TiO 2 /FeO(OH)-2 composites with p−n heterojunctions featuring nanorod and nanosphere structures recorded an overpotential of 262 mV at 10 mA cm −2 and exhibited sustained effectiveness over a 100 h period at an overpotential of 300 mV. This study not only provides a simple method for constructing p−n type heterogeneous structure materials but also in situ characterizes the role of heterojunction interfaces in the mechanism of electrocatalytic OER.

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Heterostructured Photocatalysts for Water Splitting and the Interfacial Charge Transfer

Abstract: Photocatalytic water splitting for hydrogen evolution has opened new possibilities for addressing global energy and environmental issues.

Cited by 2 publications

References 137 publications

Highly selective photocatalytic oxidation of CH4 to CH3OH: A theoretical study

Highly selective photocatalytic oxidation of CH4 to CH3OH: A theoretical study

One-Step Synthesis of TiO₂/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction

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Heterostructured Photocatalysts for Water Splitting and the Interfacial Charge Transfer

Abstract: Photocatalytic water splitting for hydrogen evolution has opened new possibilities for addressing global energy and environmental issues.

Cited by 2 publications

References 137 publications

Highly selective photocatalytic oxidation of CH4 to CH3OH: A theoretical study

Highly selective photocatalytic oxidation of CH4 to CH3OH: A theoretical study

One-Step Synthesis of TiO2/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction

Contact Info

Product

Resources

About

One-Step Synthesis of TiO₂/FeO(OH) Nano-Heterostructures as Electrocatalysts for the Oxygen Evolution Reaction