How to Prepare Tungsten Disulfide Electrocatalytic Hydrogen Evolution Catalyst?

How to prepare tungsten disulfide electrocatalytic hydrogen evolution catalyst? Or, how to prepare WS2 nanosheets for electrocatalytic hydrogen evolution reaction? The researchers proposed a method of synthesizing WS2 nanosheets on carbon cloth. This method has the advantages of simple operation, low cost and controllable procedure.

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how to prepare tungsten disulfide electrocatalytic hydrogen evolution catalyst? picture

Preparing Tungsten Disulfide Electrocatalytic Hydrogen Evolution Catalyst
Take 2 g of sodium tungstate and 25 g of hydrochloric acid dissolved in 250 mL of deionized water, stir for 30 min to obtain a uniform solution. Take 20 mL of the obtained solution into a stainless steel autoclave (50 mL), and then add 1 g of ammonium sulfate to the solution. A piece of carbon cloth (2cm×2cm) was ultrasonically cleaned with acetone, deionized water and ethanol successively, placed in an autoclave and sealed, and kept at 180 °C for 16 h. After cooling the autoclave to room temperature, the carbon cloth was taken out and rinsed with deionized water several times, and dried at 60 °C in ambient air. Finally, the obtained tungsten trioxide/carbon cloth (WO3/CC) was calcined in air at 450 °C for 1 h. Under the protection of argon atmosphere, the tungsten trioxide was calcined in the high temperature zone of the dual temperature zone tube furnace, and the temperature was raised to 600 °C at 20 °C/min. At the same time, 1 g of sulfur powder was put into the low temperature zone of the dual temperature zone tube furnace, and the temperature was raised to 200 °C at 7 °C/min, insulated for 2h. After the tube furnace was naturally cooled to room temperature, WO3/CC was taken out.

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