A kind of high-performance oxygen reduction mno2-mn3o4/carbon nanotube composite catalyst and its preparation method and application
A carbon nanotube composite and carbon nanotube technology, which is applied in the field of electrocatalysis, can solve the problems of low activity and conductivity, and achieve the effects of simple preparation method, obvious synergistic effect and good stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0027] MnO 2 -Mn 3 o 4 The preparation of carbon nanotubes is divided into two steps, as follows:
[0028] (1) Preparation of oxidized carbon nanotubes
[0029] Oxidized carbon nanotubes were synthesized by the modified Hummers method. Weigh 1 g of multi-walled carbon nanotubes and place them in a 250 mL round bottom flask, slowly add 23 mL of concentrated sulfuric acid, and stir for 24 h. Transfer the round bottom flask to a 35 °C water bath and add 0.2 g NaNO 3 And keep stirring. Wait for NaNO 3 After dissolving, add 1g KMnO very slowly 4 , to be KMnO 4 After the addition was complete, the stirring was continued for another 120 min. Slowly add 46mL deionized water, transfer to a 98°C water bath and heat for 30min, remove and cool to room temperature with constant stirring, add 140mL deionized water and 10mL 30% hydrogen peroxide in sequence and stir for 5min. The oxidized carbon nanotubes in the suspension are collected by centrifugation. During the centrifugation ...
Embodiment 2
[0036] According to the method of embodiment 1, in MnO 2 -Mn 3 o 4 In the preparation of carbon nanotubes, 25 mg of oxidized carbon nanotubes were added.
[0037] The evaluation method of catalytic performance is the same as in Example 1.
[0038] The resulting MnO 2 -Mn 3 o 4 / Carbon nanotube composite as an ORR catalyst has an initial potential of -0.09V (vs.Hg / HgO), a half-wave potential of -0.22V (vs.Hg / HgO), and a limiting current density of -5.6mA / cm 2 . In the current meter evaluation, after 7200s of continuous operation, the current density retention rate is about 90%.
PUM
Property | Measurement | Unit |
---|---|---|
current density | aaaaa | aaaaa |
current density | aaaaa | aaaaa |
current density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com