Citation: Tian-Xiang YANG, Yin-Hao WANG, Yong-Wei ZHANG, Zhuo-Lei LIU, Si-Ning YUN. Preparation and electrocatalytic properties of tungsten oxide nanorod cluster[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(2): 221-233. doi: 10.11862/CJIC.2022.274 shu

Preparation and electrocatalytic properties of tungsten oxide nanorod cluster

Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

Corresponding author: Si-Ning YUN, yunsining@xauat.edu.cn
Received Date: 4 July 2022
Revised Date: 12 November 2022

Figures(9)

WO₃ and W₁₈O₄₉ were prepared by a solvothermal method using WCl₆ as a precursor and applied in dyesensitized solar cells (DSSCs) and water electrolysis for hydrogen evolution reaction (HER). The structures and morphologies of WO₃ and W₁₈ O₄₉ were characterized by X-ray diffractometer (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM), respectively. The results showed both WO₃ and W₁₈O₄₉ were monoclinic phases, and the morphology appeared as a cluster of oriented nanorods. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) proved that W₁₈O₄₉ contained abundant oxygen vacancies. Based on the excellent electrochemical properties of oxygen vacancies, the counter electrode with W₁₈O₄₉ based DSSCs obtained a power conversion efficiency (PCE) of 7.41%, which was higher than WO₃ (6.12%) and Pt (7.27%). The cathode with W₁₈O₄₉ exhibited a low overpotential of 130 mV at 10 mA·cm^-2 and a Tafel slope of 88 mV·dec^-1 in alkaline hydrogen evolution. In addition, the W₁₈O₄₉ catalyst showed great electrocatalytic stability in both iodine electrolyte and 1.0 mol·L^-1 KOH solution.
- tungsten-based oxides,
- dye-sensitized solar cell,
- counter electrode,
- electrocatalyst,
- hydrogen evolution reaction
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沈阳化工大学材料科学与工程学院沈阳 110142