Metal-free sulfur-doped carbon material hydrogen peroxide reduction catalyst and preparation method

A technology of hydrogen peroxide and carbon materials, applied in physical/chemical process catalysts, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problem of poor electroreduction performance, low electroreduction performance, utilization Low efficiency and other problems, to achieve the effect of improving electro-oxidation performance and utilization rate, good stability, and reducing the production of oxygen

Active Publication Date: 2014-09-17
HARBIN ENG UNIV
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both noble metal and transition metal catalysts have two problems, one is poor electroreduction performance, and the other is hydrolysis to oxygen evolution, see (2) formula
This leads to H 2 o 2 Problems of low electroreduction performance and low utilization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The glassy carbon electrode coated with sulfur-doped carbon nanotubes was used as the working electrode, the carbon rod was used as the counter electrode, and Ag / AgCl was used as the reference electrode. 2 o 2 In the solution, under the voltage of -0.4V vs.Ag / AgCl, after running for 10000S, the chronocurrent density reaches 4.8mA / cm 2 . h 2 o 2 No bubbles escaped during the electroreduction process.

Embodiment 2

[0021] Using sulfur-doped carbon nanotubes coated on carbon cloth as H 2 o 2 For the cathode of direct electroreduction, 3mol / L KOH is used as catholyte; Nafin-115 proton exchange film is used as diaphragm; nano-Pt loaded on foamed nickel is used as anode, 3mol / L KOH is used as anolyte solution, 1mol / L L of sodium borohydride as fuel; when H 2 o 2 The concentration is 0.6mol / L -1 , KOH concentration is 3mol / L -1 The maximum power density of the battery is 65mW / cm -2 . h 2 o 2 No bubbles escaped during the electroreduction process.

Embodiment 3

[0023] Using sulfur-doped carbon nanotubes coated on carbon cloth as H 2 o 2 For the cathode of direct electroreduction, 3mol / L KOH is used as the catholyte; Nafin-115 proton exchange film is used as the diaphragm; the metal Al plate is used as the anolyte solution, and 6mol / L KOH is used as the anolyte solution; 2 o 2 The concentration is 0.6mol / L -1 , KOH concentration is 3mol / L -1 The maximum power density of the battery is 47mW / cm -2 . h 2 o 2 No bubbles escaped during the electroreduction process.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a metal-free sulfur-doped carbon material hydrogen peroxide reduction catalyst and a preparation method. The preparation method is characterized by comprising the following steps: putting benzyl disulfide and a carbon material into sufficient ethanol according to a mass ratio of (5-6): (95-94), ultrasonically treating the mixture for 0.5 to 1 hour, centrifuging the mixture to remove the upper substances, vacuum drying the mixture for 5 to 6 hours at the temperature of 50 to 60 DEG C to form solid powder, putting the solid powder into a high-temperature furnace to be reacted for 7 to 8 hours at the temperature of 800 to 900 DEG C under the protection of nitrogen, cooling the solid powder to room temperature under the protection of nitrogen to obtain the sulfur-doped carbon material hydrogen peroxide reduction catalyst. The sulfur is used for substituting carbon to form S-C bonds to form an activity center of the electroreduction of H2O2. The source of the raw material is wide, and the price is low. Not only is the electrochemical activity high, but also the stability is high, and the toxicity resistance is high. The hydrolysis reaction of the H2O2 can be prevented, and the oxygen can be reduced. The electric oxidation performance and utilization rate of the H2O2 can be greatly improved.

Description

technical field [0001] The invention relates to a hydrogen peroxide electroreduction catalyst. The invention also relates to a preparation method of the hydrogen peroxide electroreduction catalyst. Background technique [0002] h 2 o 2 The fuel cell as an oxidant has the advantages of high electrochemical activity, easy storage, transportation and operation, and can replace O in an oxygen-free environment such as space or underwater. 2 , especially in several representative low-temperature fuel cells has become a current research hotspot. The use of hydrogen peroxide instead of oxygen as the oxidant has the following advantages: the reduction of oxygen is a 4-electron process with a slow kinetic rate, while the reduction of hydrogen peroxide is a 2-electron process with a lower activation overpotential and thus has a faster Reaction kinetic rate; hydrogen peroxide is a liquid at room temperature, convenient for storage and transportation, especially suitable for space, u...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B01J27/20
CPCY02E60/50B82Y30/00B82Y40/00H01M4/90
Inventor 王贵领王滨刘继军曹殿学蔡庄
Owner HARBIN ENG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap