ZnSe nanoparticles with bulk WC as cocatalyst: A novel and noble-metal-free heterojunction photocatalyst for enhancing photocatalytic hydrogen evolution under visible light irradiation

Ren, Chaojun; Li, Wenjun; Gu, Shaonan; Liu, Xintong; Li, Xinyang; Fan, Hongxia; Han, Kun; Ma, Xiaoliang

doi:10.1016/j.apmt.2020.100731

Cited by 28 publications

(9 citation statements)

References 67 publications

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“…Some researchers discover that WC nanoparticles can also act as a cocatalyst for other semiconductors like SrTiO 3 , CdS, TiO 2 , g-C 3 N 4 , and ZnSe. [53,[149][150][151] To increase the surface area of WC cocatalysts, WC hollow spheres are synthesized to provide more active sites for photocatalytic hydrogen production. [152] Except for WC hollow spheres, Tong et al synthesize ultrafine [142] Copyrights 2021, Elsevier Ltd.…”

Section: Photocatalytic Hydrogen Productionmentioning

confidence: 99%

Metal Carbide‐Based Cocatalysts for Photocatalytic Solar‐to‐Fuel Conversion

Campbell

Huang

et al. 2022

Small Structures

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Semiconductor‐based photocatalytic solar‐to‐fuel conversion has proven an appealing strategy for achieving carbon‐neutral and green‐hydrogen production. However, almost all semiconductors exhibit unsatisfactory photocatalytic performance due to insufficient surface‐active sites, weak selectivity, and fast charge‐carrier recombination. For these reasons, cocatalyst loading has become an encouraging strategy for improving photocatalytic activity and selectivity. Owing to the scarcity, and cost of noble metal‐based cocatalysts, utilization of low‐cost noble‐metal‐free cocatalysts, such as metal carbide‐based cocatalysts, has aroused tremendous attention. This review highlights some recent crucial advances in active metal carbide‐based cocatalysts for photocatalytic solar‐to‐fuel conversion. First, the fundamentals of metal carbide‐based cocatalysts are presented, including the photocatalytic mechanism, advantages, drawbacks, and design rules. Second, three synthesis approaches of high‐active metal carbide‐based cocatalysts, namely constructing metal carbide nanostructures, epitaxial synthesis of metal carbides on nanostructured carbon, and crystal imperfection construction on metal carbides, are thoroughly addressed. Subsequently, applications of metal carbide‐based cocatalysts in photocatalytic hydrogen production, CO2 reduction, and nitrogen reduction are further discussed. Finally, the crucial challenges and important directions of metal carbide‐based cocatalysts for photocatalytic solar‐to‐fuel conversion are proposed. This review demonstrates some new options for rationally designing and developing novel and efficient metal carbide‐based cocatalysts for highly active and selective photocatalytic solar‐to‐fuel conversion.

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Section: Photocatalytic Hydrogen Productionmentioning

confidence: 99%

Metal Carbide‐Based Cocatalysts for Photocatalytic Solar‐to‐Fuel Conversion

Campbell

Huang

et al. 2022

Small Structures

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“…Additionally, bulk WC could significantly increase the photocatalytic H 2 evolution behavior of ZnSe NPs in the heterojunction system when used as a substitute for noble metal cocatalyst. The ideal sample evolved H 2 at a rate of 2978 μmol g −1 in 5 hours, which was 5.4 times faster than simple ZnSe NPs 108 . In another study, Diao et al synthesized WC/W 2 N by a simple solid‐state synthesis strategy.…”

Section: Tungsten Carbidementioning

confidence: 99%

“…The ideal sample evolved H 2 at a rate of 2978 μmol g À1 in 5 hours, which was 5.4 times faster than simple ZnSe NPs. 108 In another study, Diao et al synthesized WC/W 2 N by a simple solid-state synthesis strategy. The resulting WC/W 2 N heterostructure catalysts demonstrated effective and reliable electrocatalytic performance for the HER and OER, with an ORR halfwave potential of 0.81 V and a low overpotential for the HER(184 mV) and OER(320 mV) at 10 mA cm À2.…”

Section: Tungsten Phosphidementioning

confidence: 99%

An inclusive perspective on the recent development of tungsten‐based catalysts for overall water‐splitting : A review

Abdullah

Ali

Pervaiz

et al. 2022

Intl J of Energy Research

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Summary The problems of energy shortages, environmental pollution and the ever‐increasing global population are creating serious concerns for mankind. For a sustainable future, it is essential to explore clean and renewable alternate energy sources. The green energy consumption model aims towards a future with a competent and sustainable hydrogen economy to fulfill the global energy demands. Water‐splitting is a promising method for clean hydrogen production. A highly active noble metal‐free catalyst is the main pre‐requisite, to make the process energy‐efficient and economical. An optimum catalyst lowers the energy required for the disassociation of water by driving down the overpotential of the process. Tungsten‐based materials are an considered effective catalyst for water‐splitting due to natural availability, environmental friendliness, high photostability, high electron mobility, large hole diffusion length and high catalytic activities. In recent years, a diverse range of tungsten‐based materials has been developed as photo/electro catalysts for water‐splitting. This review aims to present a comprehensive understanding and timely reference for the progress of tungsten‐based catalysts in this field. This study begins with the fundamental principle of water splitting and the properties of tungsten and its hybrids then moves on to different techniques for producing binary/ternary nanocomposites for overall water splitting. A comprehensive overview of the recent developments in tungsten‐based photo/electro catalysts for overall water splitting is then presented with the techniques to enhance the catalyst activity, such as morphological control, surface modification, heteroatom doping, and heterojunction construction. Finally, recommendations for the future are proposed.

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“…Several strategies such as controlling morphologies and phases, [ 4 ] loading cocatalysts, [ 5 ] and constructing heterojunctions [ 6 ] have been demonstrated to improve the catalytic activity of metal selenide and other nanostructured semiconductors. Moreover, the formation of metal selenides‐based solid solutions can enhance light absorption and charge transfer.…”

Section: Introductionmentioning

confidence: 99%

Tunable Bandgap Engineering of Zn_xCd_1−xSe Solid Solution with Controlled Ratio via a Facile One‐Pot Synthesis for Visible‐Light Photocatalytic H₂ Production

Wei

Zeng

et al. 2022

Adv Energy and Sustain Res

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Metal selenide semiconductors in photocatalysis are limited, owing to their low activity and poor stability. Herein, a facile one‐pot solution approach is developed to prepare particulate Zn x Cd1−x Se solid solutions with tunable energy band structures. X‐ray diffractometer (XRD) patterns demonstrate that the crystal structure of the samples are not changed. The analysis of UV–vis and the photoluminescence spectra exhibits that the bandgap of Zn x Cd1−x Se photocatalysts utilizing oleylamine as an organic template can be accurately controlled, which gradually becomes wider from 1.60 to 2.70 eV with increasing Zn/Cd molar ratio. Under visible‐light irradiation, the optimal Zn0.5Cd0.5Se without any cocatalyst exhibits a superior photocatalytic H2 generation rate (438.3 μmol h−1 g−1), exceeding that of pristine CdSe and ZnSe by more than 12 and 17 times, an apparent quantum yield of 1.7% at 420 nm and excellent stability. The results are on account of the balance between the bandgap width and the conduction band (CB) potential of Zn0.5Cd0.5Se, implying the excitation of more photogenerated electrons and faster charge carrier separation efficiency, which could be substantiated by the transient photocurrent response and electrochemical impedance spectroscopy. Therefore, this work provides a straightforward strategy to synthesize metal selenide for diverse photocatalytic applications.

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ZnSe nanoparticles with bulk WC as cocatalyst: A novel and noble-metal-free heterojunction photocatalyst for enhancing photocatalytic hydrogen evolution under visible light irradiation

Cited by 28 publications

References 67 publications

Metal Carbide‐Based Cocatalysts for Photocatalytic Solar‐to‐Fuel Conversion

Metal Carbide‐Based Cocatalysts for Photocatalytic Solar‐to‐Fuel Conversion

An inclusive perspective on the recent development of tungsten‐based catalysts for overall water‐splitting : A review

Tunable Bandgap Engineering of Zn_xCd_1−xSe Solid Solution with Controlled Ratio via a Facile One‐Pot Synthesis for Visible‐Light Photocatalytic H₂ Production

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ZnSe nanoparticles with bulk WC as cocatalyst: A novel and noble-metal-free heterojunction photocatalyst for enhancing photocatalytic hydrogen evolution under visible light irradiation

Cited by 28 publications

References 67 publications

Metal Carbide‐Based Cocatalysts for Photocatalytic Solar‐to‐Fuel Conversion

Metal Carbide‐Based Cocatalysts for Photocatalytic Solar‐to‐Fuel Conversion

An inclusive perspective on the recent development of tungsten‐based catalysts for overall water‐splitting : A review

Tunable Bandgap Engineering of ZnxCd1−xSe Solid Solution with Controlled Ratio via a Facile One‐Pot Synthesis for Visible‐Light Photocatalytic H2 Production

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Tunable Bandgap Engineering of Zn_xCd_1−xSe Solid Solution with Controlled Ratio via a Facile One‐Pot Synthesis for Visible‐Light Photocatalytic H₂ Production