Synergy of W doping and oxygen vacancy engineering on d-band center modulation for enhanced gas sensing performance

Shi, Yushu; Liu, Tongyao; Hu, Riming; Xu, Huiyan; Yang, Chengxiang; Yang, Likai; Feng, Liang; Jiang, Xuchuan

doi:10.1039/d3ta07007g

Cited by 4 publications

(1 citation statement)

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“…This electrodeposition process can lead to oxygen detachment from the lattice, resulting in anoxia . In addition, the change in the Co valence state (cycling of Co 2+ to Co 3+ ) and the substitution of Co and Fe in CoFe-LDH for bismuth vanadate in the V site can trigger small polaron leaps in the sample, resulting in the formation of oxygen vacancies. This significant augmentation of oxygen vacancies not only enhances charge transport and trapping efficiency but also augments the active sites for the water oxidation process, thereby amplifying catalytic performance.…”

Section: Results and Discussionmentioning

confidence: 99%

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO₄ Nanoparticles as Photoanode for Photoelectrochemical Water Splitting

Chen,

Chang,

et al. 2024

ACS Appl. Nano Mater.

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The application of BiVO 4 in photoelectrochemical water splitting for efficient clean hydrogen energy production encounters challenges arising from the sluggish kinetics of water oxidation. Motivated by the synergistic interplay of metal sites and ligands on the catalyst surface, we utilized the photoelectric deposition technique to introduce amorphous nanothin layers of cobalt−iron double hydroxide (referred to as CoFe-LDH) onto the Fe-doped BiVO 4 surface. Fe dopants lead to a size reduction of BiVO 4 nanoparticles while enlarging the specific surface area and pore volume, thus increasing the reaction sites, which is favorable for photoelectrochemical water splitting. The unique dual-layered structure of CoFe-LDH not only enhances the mobility of charge carriers but also addresses surface defects through passivation. Additionally, it optimizes the exposure of active sites on the surface and expedites the flow of charge carriers, effectively mitigating recombination. The CoFe/Fe-BiVO 4 photoanode demonstrates outstanding photocatalytic performance, achieving a substantial photocurrent of 2.56 mA cm −2 (at 1.23 V vs RHE) and an impressive incident photon current conversion efficiency (IPCE) of 52.1% at 400 nm, which is approximately a 270% increment in photocurrent and a remarkable 2.2-fold improvement in IPCE compared to those of the unmodified sample. In addition, the charge surface transport efficiency increases from 16.8% to 62.5% at 1.23 V vs RHE after modification of the cobalt−iron hydroxide bilayer. This study not only emphasizes the promising results of employing binary polymetallic co-catalysts but also provides a strategic pathway to improve semiconductor-based photoelectrodes in various photoelectrochemical applications.

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Section: Results and Discussionmentioning

confidence: 99%

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO₄ Nanoparticles as Photoanode for Photoelectrochemical Water Splitting

Chen,

Chang,

et al. 2024

ACS Appl. Nano Mater.

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Rational design of an air-breathing gas-diffusion electrode with oxygen vacancy-rich ZnO for robust and durable H2O2 electrosynthesis

Sun,

Xia,

Sheng

et al. 2024

Chemical Engineering Journal

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Sabatier phenomenon in chemoselective gas-sensing reactions induced by Ag cluster coordination

Fan,

Lu,

Zhan

et al. 2024

Journal of Colloid and Interface Science

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Synergy of W doping and oxygen vacancy engineering on d-band center modulation for enhanced gas sensing performance

Abstract: W doping and vacancy engineering allowed the control of the d-band center of the material and improved the gas sensing performance.

Cited by 4 publications

References 47 publications

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO₄ Nanoparticles as Photoanode for Photoelectrochemical Water Splitting

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO₄ Nanoparticles as Photoanode for Photoelectrochemical Water Splitting

Rational design of an air-breathing gas-diffusion electrode with oxygen vacancy-rich ZnO for robust and durable H2O2 electrosynthesis

Sabatier phenomenon in chemoselective gas-sensing reactions induced by Ag cluster coordination

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Synergy of W doping and oxygen vacancy engineering on d-band center modulation for enhanced gas sensing performance

Abstract: W doping and vacancy engineering allowed the control of the d-band center of the material and improved the gas sensing performance.

Cited by 4 publications

References 47 publications

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO4 Nanoparticles as Photoanode for Photoelectrochemical Water Splitting

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO4 Nanoparticles as Photoanode for Photoelectrochemical Water Splitting

Rational design of an air-breathing gas-diffusion electrode with oxygen vacancy-rich ZnO for robust and durable H2O2 electrosynthesis

Sabatier phenomenon in chemoselective gas-sensing reactions induced by Ag cluster coordination

Contact Info

Product

Resources

About

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO₄ Nanoparticles as Photoanode for Photoelectrochemical Water Splitting

CoFe Layered Double Hydroxide Supported on Fe-Doped BiVO₄ Nanoparticles as Photoanode for Photoelectrochemical Water Splitting