Sulfur-doped molybdenum compound self-supporting electrode, preparation method and water catalytic decomposition method
A self-supporting electrode and molybdenum compound technology, applied in the field of electrocatalysis, can solve the problems of unfavorable hydrogen energy development, hydrogen economy development, limited hydrogen production on the cathode, slow kinetics, etc., achieve good catalytic hydrogen evolution performance and stability, and reduce energy consumption. The effect of consumption and cost saving
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[0031] A method for preparing a sulfur-doped molybdenum compound self-supporting electrode, comprising the following steps:
[0032] Soak molybdenum wire in 1.5% H 2 o 2 The solution is 1.5-2.5 hours, preferably soaked for 2 hours, taken out and dried; then placed in an etching solution containing a sulfur source for 10-14 hours, preferably, reacted for 12 hours, taken out and dried; then placed in an autoclave at 170-190 Heating reaction at ℃ for 22~26h, preferably at 180℃ for 24h; take out and dry in oven at 75~85℃ for 8~12h, then dry in oven at 110~130℃ for 20~22h, preferably at 80℃ Dry for 10 hours, and then dry in an oven at 120°C for 21 hours to obtain a sulfur-doped molybdenum compound self-supporting electrode.
[0033] Wherein, the etching solution containing sulfur source includes sulfur source, polyethylene glycol, acetic acid, formic acid, water, and the sulfur source includes one or more of potassium thiocyanate, carbon disulfide, sulfur powder and thiourea.
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Embodiment 1
[0044] Take 5 molybdenum wires of the same specification, respectively numbered 1#, 2#, 3#, 4#, 5#. Among them, the 1# molybdenum wire was not treated as a control group; the 2#, 3#, 4#, and 5# molybdenum wires were treated according to the following methods:
[0045] Use 2#, 3#, 4#, 5# molybdenum wire with a volume fraction of 1.5% H 2 o 2 Soak for 2 hours, take out and dry for later use;
[0046] Prepare four etching solutions containing different sulfur sources, as follows:
[0047] ①Measure 1.2g potassium thiocyanate, 50mL H 2 0. Put 10mL polyethylene glycol, 2mL formic acid and 2mL acetic acid in a beaker to prepare an etching solution containing potassium thiocyanate; ② Measure 10mL carbon disulfide, 50mL H 2 0, 10mL Polyethylene Glycol, 2mL formic acid and 2mL acetic acid are in beaker, make the etchant containing carbon disulfide;
[0048] ③ Measure 0.5g sulfur powder, 50mL H 2 0, 10mL Polyethylene Glycol, 2mL formic acid and 2mL acetic acid are in beaker, make t...
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