Electrochemical nitrogen-reduction ammonia-preparing non-oble metal catalyst
An electrochemical and transition metal technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve excellent catalytic efficiency, cycle and thermal stability, and broad application prospects.
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example 1
[0039]Step 1: Synthesize the vanadium pentoxide nanowire array precursor by hydrothermal method. Add 0.1 g of vanadium pentoxide powder and 0.17 g of oxalic acid into a 25 ml beaker of distilled water, and obtain a homogeneous solution under constant stirring. Add 60 mg urea and 5 mL ethylene glycol, stir for 30 min, then transfer to a 50 mL Teflon autoclave liner.
[0040] Step 2: Put the catalyst base carbon cloth into the reaction kettle lining of step 1, and seal the polytetrafluoroethylene lining into a stainless steel mold, place it in a constant temperature drying oven under closed conditions and heat it at 180°C for reaction 12h, then cooled.
[0041] Step 3: Take out the precursor, wash it several times with deionized water, and dry it in an oven. Vanadium pentoxide nanowire arrays were obtained by annealing at 350°C in air for 2 hours.
[0042] Step 4: Place the vanadium pentoxide nanowire array prepared in step 3 in a tube furnace and inject ammonia gas, and reac...
example 2
[0045] Step 1: Synthesize the vanadium oxide nanosheet array precursor by hydrothermal method. Add 2 mmol sodium vanadate and 6 mmol oxalic acid to a beaker of 80 mL distilled water to obtain a homogeneous solution with constant stirring for 30 min, then transfer to a 100 mL Teflon autoclave lined.
[0046] Step 2: Put the catalyst substrate titanium mesh into the reaction kettle lining of step 1, and seal the polytetrafluoroethylene lining into a stainless steel mold, place it in a constant temperature drying oven under closed conditions and heat it at 120°C for reaction 12h, then cooled.
[0047] Step 3: Take out the precursor, wash it several times with deionized water, and dry it in an oven. The vanadium oxide nanosheet arrays were obtained by annealing in air at 600°C for 2 hours.
[0048] Step 4: Place the vanadium oxide nanosheet array prepared in step 3 in a tube furnace and pass through ammonia gas, and react at 600°C for 3 hours in an ammonia gas atmosphere to obta...
example 3
[0051] Step 1: Synthesize the molybdenum sulfide nanosheet array precursor by hydrothermal method. Add 0.242 g of sodium molybdate and 0.305 g of thiourea to a 22 mL beaker of distilled water (50 mL), then a homogeneous solution was obtained after stirring for 30 min, then transferred to a 50 mL Teflon autoclave liner .
[0052] Step 2: Put the catalyst base carbon cloth into the reactor lining of step 1, and seal the polytetrafluoroethylene lining into a stainless steel mold, place it in a constant temperature drying oven under closed conditions and heat it at 220°C for reaction 24h, then cool.
[0053] Step 3: Take out the precursor, wash it several times with deionized water, and dry it in an oven. Molybdenum sulfide nanosheet arrays were obtained by drying in air at 60 °C.
[0054] Step 4: Place the molybdenum sulfide nanosheet array prepared in step 3 in a tube furnace and pass through ammonia gas, and react at 800°C for 3 hours in an ammonia gas atmosphere to obtain a...
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