Preparation method of nitrogen-doped titanium-based aerogel electrocatalyst for oxygen reduction reaction
A technology of nitrogen doping and aerogel, which is applied in the field of electrochemical catalysis, can solve the problems of performance degradation, lower overall battery performance, preparation cost and stability impact, etc., to achieve reduced reaction resistance, excellent catalytic effect, and chemical stability Good results
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example 1
[0035] Resorcinol, formaldehyde, urea, ethanol, hydrochloric acid are mixed uniformly to prepare nitrogen-doped resorcinol-formaldehyde (N-RF) sol in molar ratio of 1:2:0.04:8:0.04; Based on molar weight, ethanol and deionized water were mixed in molar ratio (13:4) to prepare solution 1, tetrabutyl titanate, nitric acid, and ethanol were mixed in molar ratio (1:0.4:13) to prepare solution 2, and solution 1 Mix with solution 2 (tetrabutyl titanate by molar ratio: deionized water = 1:4) to obtain TiO 2 sol, N-RF sol and TiO 2 The sol (resorcinol: tetrabutyl titanate = 1:1 by molar ratio) was mixed evenly by magnetic stirring to obtain N-RF / TiO 2 The composite sol was sealed and placed in an oven at 50°C for 8 hours to obtain a wet gel through sol-gel reaction. The obtained wet gel was replaced with ethanol solvent in an oven at 50°C for up to 5 days, and then replaced by CO 2 Supercritical drying for 8 hours to obtain bulk N-RF / TiO 2 Composite airgel, the N-RF / TiO 2 The comp...
example 2
[0038] Resorcinol, formaldehyde, urea, ethanol, hydrochloric acid are mixed uniformly to prepare nitrogen-doped resorcinol-formaldehyde (N-RF) sol in molar ratio of 1:3:0.06:10:0.06; The molar weight of ethanol and deionized water are mixed to prepare solution 1 in molar ratio (14:4), and titanium isopropoxide, nitric acid, ethanol are mixed in molar ratio (1:0.5:14) to prepare solution 2, and solution 1 Mix well with solution 2 (titanium isopropoxide in molar ratio: deionized water=1:4) to obtain TiO 2 sol, N-RF sol and TiO 2 The sol (resorcinol:titanium isopropoxide=1:1 by molar ratio) was mixed evenly by magnetic stirring to obtain N-RF / TiO 2 The composite sol was sealed and placed in an oven at 60°C for 7 hours to obtain a wet gel through a sol-gel reaction. The obtained wet gel was replaced with ethanol solvent in an oven at 60°C for up to 4 days, and then replaced by CO 2 Supercritical drying for 10 hours to obtain bulk N-RF / TiO 2 Composite airgel, the N-RF / TiO 2 The...
example 3
[0041] Resorcinol, formaldehyde, urea, ethanol, and glacial acetic acid are mixed uniformly in a molar ratio of 1:3:0.08:10:0.06 to prepare nitrogen-doped resorcinol-formaldehyde (N-RF) sol; The molar weight of phenol is a benchmark, ethanol and deionized water are mixed in molar ratio (14:5) to prepare solution 1, tetraethyl titanate, nitric acid, ethanol are mixed in molar ratio (1:0.6:14) to prepare solution 2, and Solution 1 and solution 2 (tetraethyl titanate by molar ratio: deionized water = 1:5) were mixed uniformly to obtain TiO 2 sol, N-RF sol and TiO 2 The sol (resorcinol: tetraethyl titanate = 1:1 by molar ratio) was mixed evenly by magnetic stirring to obtain N-RF / TiO 2 The composite sol was sealed and placed in an oven at 70°C for 6 hours to obtain a wet gel through sol-gel reaction. The obtained wet gel was replaced with ethanol solvent in an oven at 70°C for up to 3 days, and then replaced by CO 2 Supercritical drying for 12 hours to obtain bulk N-RF / TiO 2 Co...
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