WCeCoOx catalyst for low-temperature CO catalysis and preparation method of WCeCoOx catalyst
A low-temperature, oxidant technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as high cost, achieve low cost, excellent catalytic activity, Source-rich effects
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Embodiment 1
[0020] Embodiment 1: 26g cobalt acetate, 0.98g cerium nitrate, 0.3g ammonium tungstate (being 3WO 3 -3CeO 2 -Co 3 o 4 , CeO 2 The amount added is Co 3 o 4 3wt% of WO 3 The amount added is Co 3 o 4 and CeO 2 3wt% of the sum of the added amounts) was added to 100mL of 40% ethanol solution by volume fraction. Stir ultrasonically at room temperature until the precursors are completely dissolved, and then raise the temperature of the ultrasonic water bath to 70°C. Add 100mL of sodium carbonate solution, ultrasonically stir for 6h, then centrifuge and wash at 5000r / min for 5min, and wash four times in total. The obtained precipitate was dried in an oven at 110°C for 12h, then baked in a muffle furnace at 200°C for 1h, and cooled to room temperature naturally. The resulting solid was sieved to 20-40 mesh for later use to obtain 1#CO catalyst.
Embodiment 2
[0021] Embodiment 2: 26g cobalt acetate, 1.18g cerium nitrate, 0.3g ammonium tungstate (being 3WO 3 -5CeO 2 -Co 3 o 4 , CeO 2 The amount added is Co 3 o 4 5wt% of WO 3 The amount added is Co 3 o 4 and CeO 2 3wt% of the sum of the added amounts) was added to 100mL of 40% ethanol solution by volume fraction. Stir ultrasonically at room temperature until the precursors are completely dissolved, and then raise the temperature of the ultrasonic water bath to 70°C. Add 100mL of sodium carbonate solution, ultrasonically stir for 6h, and then centrifuge and wash it at 5000r / min for 5min, washing twice in total. The obtained precipitate was dried in an oven at 110°C for 12h, then baked in a muffle furnace at 400°C for 3h, and cooled to room temperature naturally. The resulting solid was sieved to 20-40 mesh for later use to obtain 2#CO catalyst.
Embodiment 3
[0022] Embodiment 3: 26g cobalt acetate, 1.38g cerium nitrate, 0.3g ammonium tungstate (being 3WO 3 -7CeO 2 -Co 3 o 4 , CeO 2 The amount added is Co 3 o 4 7wt% of WO 3 The amount added is Co 3 o 4 and CeO 2 3wt% of the sum of the added amounts) was added to 100mL of 40% ethanol solution by volume fraction. Stir ultrasonically at room temperature until the precursors are completely dissolved, and then raise the temperature of the ultrasonic water bath to 50°C. Add 100mL of sodium carbonate solution, ultrasonically stir for 6h, then centrifuge and wash at 5000r / min for 5min, and wash six times in total. The obtained precipitate was dried in an oven at 110°C for 12h, then baked in a muffle furnace at 400°C for 3h, and cooled to room temperature naturally. The resulting solid was sieved to 20-40 mesh for later use to obtain 3#CO catalyst.
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