Dual co-catalysts decorated Zn-WO3 nanorod arrays with highly efficient photoelectrocatalytic performance

Li, Xidi; Ai, Minhua; Zhang, Xiangwen; Zou, Ji‐Jun; Pan, Lun

doi:10.1016/j.ijhydene.2022.02.122

Cited by 10 publications

(4 citation statements)

References 46 publications

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“…XPS is employed to analyze the valence state of the obtained catalysts. The survey scan spectrum (Figure 2a) confirms that the elements Ir, W, and O are the major components in (W 50 As shown in Table 1, with the Ir element content increasing from 0.2 to 0.5, the content of Ir 4+ in the samples gradually increased, the content of Ir 3+ gradually decreased, and the content of W 6+ gradually increased. W 18 O 49 reduces part of Ir 4+ to Ir 3+ ; therefore, the part of supported iridium oxide particles are IrO x with incomplete crystallization.…”

Section: Materials Characterizationmentioning

confidence: 58%

“…Figure c presents W 4f XPS spectra of (W 1– x Ir x )O y , and the main peaks at binding energy values of 35.58–35.98 and 37.68–38.18 eV are assigned to 4f 7/2 and 4f 5/2 states of W 6+ . However, another set of peaks at the lower binding energies of 34.58–35.28 and 36.68–37.38 eV is attributed to the W 5+ state . As shown in Table , with the Ir element content increasing from 0.2 to 0.5, the content of Ir 4+ in the samples gradually increased, the content of Ir 3+ gradually decreased, and the content of W 6+ gradually increased.…”

Section: Resultsmentioning

confidence: 99%

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IrO₂ Nanoparticle-Decorated Ir-Doped W₁₈O₄₉ Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

Yan

Chen

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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The oxygen evolution reaction (OER) severely limits the efficiency of proton exchange membrane (PEM) electrolyzers due to slow reaction kinetics. IrO 2 is currently a commonly used anode catalyst, but its large-scale application is limited due to its high price and scarce reserves. Herein, we reported a practical strategy to construct an acid OER catalyst where Iridium oxide loading and iridium element bulk doping are realized on the surface and inside of W 18 O 49 nanowires by immersion adsorption, respectively. Specifically, W 0.7 Ir 0.3 O y has an overpotential of 278 mV at 10 mA•cm −2 in 0.1 M HClO 4 . The mass activity of 714.10 A•g Ir −1 at 1.53 V vs. the reversible hydrogen electrode (RHE) is 80 times that of IrO 2 , and it can run stably for 55 h. In the PEM water electrolyzer device, its mass activity reaches 3563.63 A•g Ir −1 at the cell voltage of 2.0 V. This improved catalytic performance is attributed to the following aspects: (1) The electron transport between iridium and tungsten effectively improves the electronic structure of the catalyst; (2) the introduction of iridium into W 18 O 49 by means of elemental bulk doping and nanoparticles supporting for the enhanced conductivity and electrochemically active surface area of the catalyst, resulting in extensive exposure of active sites and increased intrinsic activity; and(3) during the OER process, partial iridium elements in the bulk phase are precipitated, and iridium oxide is formed on the surface to maintain stable activity. This work provides a new idea for designing oxygen evolution catalysts with low iridium content for practical application in PEM electrolyzers.

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Section: Materials Characterizationmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 99%

IrO₂ Nanoparticle-Decorated Ir-Doped W₁₈O₄₉ Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

Yan

Chen

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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“…Furthermore, 1D WO 3 photoanode can be synthesized by combining the hydrothermal method and calcination, a common method for photoanode preparation. For example, WO 3 nanorod arrays were grown on the surface of a fluorine‐doped tin oxide (FTO)‐coated glass substrate and subsequently calcined at 500 °C [20] . Anodization is another common method for synthesizing photoanode, including WO 3 nanorod photoanode.…”

Section: Design Of Wo3‐based Photocatalysts and Photoanodesmentioning

confidence: 99%

“…For example, WO 3 nanorod arrays were grown on the surface of a fluorine-doped tin oxide (FTO)-coated glass substrate and subsequently calcined at 500 °C. [20] Anodization is another common method for synthesizing photoanode, including WO 3 nanorod photoanode. Fernández-Domene et al fabricated WO 3 nanorods by anodization of tungsten cylinders (8 mm in diameter) with a subsequent thermal treatment (annealing).…”

Section: Morphology Controlmentioning

confidence: 99%

WO₃‐based Materials for Photocatalytic and Photoelectrocatalytic Selective Oxidation Reactions

Wang,

Einaga

2023

ChemCatChem

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Selective oxidation reactions are crucial in producing various chemicals in the industry. However, most catalytic processes for these reactions use harsh reaction conditions. Recently, heterogeneous photo(electro)catalysis has been considered promising for selective oxidation reactions under mild conditions. Semiconductor materials are frequently used as heterogeneous photocatalysts because they can produce active species that contribute to the oxidation of organic compounds under light irradiation. Among various semiconductor photocatalysts, tungsten oxide (WO3) is one of the most promising candidates due to its advantages, including high stability, wide light adsorption range, proper band structures, and unique catalytic mechanism. This paper reviews the WO3‐based materials for photocatalytic (PC) and photoelectrocatalytic (PEC) selective oxidations. We summarize the strategies for designing WO3 structures, which include morphology control, crystal facet optimization, and defect engineering. Then, the finely designed WO3 structures for PC and PEC oxidation of several typical organic compounds have been discussed based on catalytic mechanism and performance. Finally, we propose the prospects and challenges of WO3 photocatalysts and photoanodes in selective oxidation reactions.

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Architecture modification and In3+-doping of WO3 photoanodes to boost the photoelectrochemical water oxidation performance

et al. 2023

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Dual co-catalysts decorated Zn-WO3 nanorod arrays with highly efficient photoelectrocatalytic performance

Cited by 10 publications

References 46 publications

IrO₂ Nanoparticle-Decorated Ir-Doped W₁₈O₄₉ Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

IrO₂ Nanoparticle-Decorated Ir-Doped W₁₈O₄₉ Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

WO₃‐based Materials for Photocatalytic and Photoelectrocatalytic Selective Oxidation Reactions

Architecture modification and In3+-doping of WO3 photoanodes to boost the photoelectrochemical water oxidation performance

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Dual co-catalysts decorated Zn-WO3 nanorod arrays with highly efficient photoelectrocatalytic performance

Cited by 10 publications

References 46 publications

IrO2 Nanoparticle-Decorated Ir-Doped W18O49 Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

IrO2 Nanoparticle-Decorated Ir-Doped W18O49 Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

WO3‐based Materials for Photocatalytic and Photoelectrocatalytic Selective Oxidation Reactions

Architecture modification and In3+-doping of WO3 photoanodes to boost the photoelectrochemical water oxidation performance

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IrO₂ Nanoparticle-Decorated Ir-Doped W₁₈O₄₉ Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

IrO₂ Nanoparticle-Decorated Ir-Doped W₁₈O₄₉ Nanowires with High Mass Specific OER Activity for Proton Exchange Membrane Electrolysis

WO₃‐based Materials for Photocatalytic and Photoelectrocatalytic Selective Oxidation Reactions