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- 저자 : Hanyoung Jung(정한영) (검색결과 1 건)
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WS₂ Hollow Sphere Doped by Platinum for High Efficient Hydrogen Evolution Reaction
Minju Chae(채민주),Sujung Suh(서수정),Hanyoung Jung(정한영) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7
Hydrogen is considered an excellent replacement fuel for the efficient and environmentally friendly production of energy. Transition metal dichalcogenides (TMDs) have unique catalytic properties and are earth-abundant, which would allow the production of hydrogen in a facile and low-cost manner. WS<SUB>2</SUB> is a stable and highly active catalyst for the hydrogen evolution reaction (HER). Hollow sphere WS<SUB>2</SUB> nanosheets were synthesized by one-step hydrothermal synthesis, and the prepared WS<SUB>2</SUB> was doped with a platinum chloride solution to enhance HER performance. The diameters of the WS<SUB>2</SUB> hollow spheres were in the range for 400 nm to 2 ㎛, and exhibited an overpotential of 210 mV. The Pt-doped WS<SUB>2</SUB> exhibited an overpotential of 73 mV, which was lower than that of WS<SUB>2</SUB> hollow sphere. Therefore, Pt-doped WS<SUB>2</SUB> is an efficient catalyst for hydrogen evolution reaction. XRD was performed to confirm the crystal structures of the prepared materials. The morphology and composition of the materials were analyzed by SEM and EDS. Raman spectroscopy and TEM were performed to determine the structures and sizes of the materials. The chemical composition was confirmed by XPS.
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