INVESTIGATE THE STRUCTURE AND CATALYTIC ACTIVITY OF PROTON REDUCTION  TO GENERATE HYDROGEN OF TUNGSTEN SULFIDE MATERIAL SYNTHESIZED  BY HYDROTHERMAL METHOD

Nguyen Thi Chuc; Hoang Thi Huyen Trang; Nguyen Thi Quynh Hoa; Nguyen Viet Thuy; Phan Thi Uyen Nhung; Bui Quoc Huy

Nguyen Thi Chuc Hung Yen University of Technology and Education
Hoang Thi Huyen Trang Hung Yen University of Technology and Education
Nguyen Thi Quynh Hoa Hung Yen University of Technology and Education
Nguyen Viet Thuy Hung Yen University of Technology and Education
Phan Thi Uyen Nhung Hung Yen University of Technology and Education
Bui Quoc Huy Hung Yen University of Technology and Education

Keywords: electrochemical catalyst, hydrogen evolution reaction, solvothermal, tungsten sulfide

Abstract

Tungsten sulfide materials have been investigated as effective electrocatalysts for the hydrogen evolution reaction (HER). However, many methods for synthesizing this group of materials are very complex and difficult to meet for synthesizing powdered materials in large quantities. In this study, we synthesized powdered tungsten sulfide using a simple, scalable method, which is the solvothermal method. Combining analysis: scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), raman scattering spectroscopy, the composition of the resulting material was determined to be WS2.63 and has an amorphous structure. WS2.63 showed good activity for HER with a low Tafel slope of 58.41 mV/dec; the onset overpotential is 0.15 V. This research can be exploited to apply the solvothermal method to expand the development of other powder catalysts for the HER reaction in relatively large scales.

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