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Bamboo/clad non-precious metal so 2 Electrochemical Oxidation Catalyst and Its Preparation and Application

An oxidation catalyst, non-precious metal technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of high cost of electro-oxidation catalysts, achieve easy mass production, simple preparation devices, and facilitate transmission. qualitative effect

Active Publication Date: 2020-09-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the noble metal SO 2 The cost of electro-oxidation catalyst is high, and the object of the present invention is to provide a kind of high-efficiency SO 2 Electrochemical oxidation performance of bamboo / coated non-noble metal SO 2 Electrochemical oxidation catalyst, while providing its preparation method and application

Method used

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  • Bamboo/clad non-precious metal so <sub>2</sub> Electrochemical Oxidation Catalyst and Its Preparation and Application
  • Bamboo/clad non-precious metal so <sub>2</sub> Electrochemical Oxidation Catalyst and Its Preparation and Application
  • Bamboo/clad non-precious metal so <sub>2</sub> Electrochemical Oxidation Catalyst and Its Preparation and Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Take 1g ferric ammonium citrate and add it to 20mL deionized water, the molar concentration is 0.1mol L -1 , Fully agitate and disperse; take 2.4g of melamine and add it to 100mL of 100℃ deionized water, the molar concentration is 0.19mol L -1 , Fully dissolve and stir; add ferric ammonium citrate solution to the melamine solution, fully stir and combine, add 0.5g NKF-11 molecular sieve, adjust the temperature to 80°C, stir and evaporate to dryness at constant temperature. Put the precursor mixture into the tube furnace, Ar atmosphere, at 2℃ min -1 Raise to 600℃, keep at constant temperature for 2h; take it out after cooling. Under the condition of 40℃, the carbide is in 1mol L -1 Stand in NaOH for 24h; wash with deionized water, then in 5% NH 4 F and CH 3 COOH mixed solution (NH 4 F and CH 3 The mass ratio of COOH is 1:1) Let stand for 24h; wash and dry. 10℃min -1 Raise to 700°C for secondary carbonization and keep at constant temperature for 2h. Natural cooling, grindi...

Embodiment 2

[0049] Take 1g ferric ammonium citrate and add it to 20mL deionized water, the molar concentration is 0.1mol L -1 , Fully agitate and disperse; take 2.4g of melamine and add it to 100mL of 100℃ deionized water, the molar concentration is 0.19mol L -1 , Fully dissolve and stir; add ferric ammonium citrate solution to the melamine solution, fully stir and combine, add 0.5g NKF-11 molecular sieve, adjust the temperature to 80°C, stir and evaporate to dryness at constant temperature. Put the precursor mixture into the tube furnace, Ar atmosphere, at 10℃ min -1 Raise to 500℃, keep at constant temperature for 2h; take it out after cooling. Under the condition of 40℃, the carbide is in 1mol L -1 Stand in NaOH for 24h; wash with deionized water, then in 5% NH 4 F and CH 3 Let stand for 24h in the COOH mixed solution; wash and dry. 10℃min -1 Raise to 700°C for secondary carbonization and keep at constant temperature for 2h. Natural cooling, grinding to obtain catalyst, its SO 2 Electroo...

Embodiment 3

[0051] At 1g L -1 Na 2 SO 3 (H 2 SO 4 ), test the SO of the catalyst prepared in Example 1 2 The oxidation performance is compared with Pt / C catalyst. Linear voltage sweep conditions: 5mV s -1 ,1600r min -1 . The catalyst has better SO in the low oxidation zone 2 Oxidation performance, but there is a certain gap with Pt / C; after oxidation potential is higher than 1.186V, it has better SO than Pt / C 2 Oxidation performance. The catalyst of the present invention is more suitable for the oxidation potential in the range of 0.9-1.4V, and the test results are as follows figure 1 Shown.

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Abstract

The invention provides a bamboo / coated non-precious metal SO 2 Electrochemical oxidation catalyst and its preparation method and application. Through constant temperature chelation reaction, the combination of precursors is carried out; Fe, N, C precursors are filled in porous molecular sieve templates; after carbonization treatment, active sites and active components are formed; carbon-based catalysts are obtained by template removal; after Secondary carbonization, adjusting the conductivity and surface functional groups of the catalyst, etc., to obtain non-precious metal SO with bamboo-like / coated structure 2 Electrochemical oxidation catalyst. The raw material of the catalyst is cheap and easy to obtain, the preparation device is simple, and it is easy to produce in large quantities. The catalyst of the invention is a non-precious metal catalyst, has a relatively high specific surface area, a large pore volume and a typical mesoporous structure, can provide more catalytic active sites and is beneficial to mass transfer. The catalyst has SO comparable to that of Pt / C in the high potential region 2 Electrochemical oxidation capacity for SO 2 Research in the field of electrochemical oxidation and desulfurization has important application value and application prospects.

Description

Technical field [0001] The invention relates to a bamboo joint / coated non-precious metal SO 2 Electrochemical oxidation catalyst and its preparation method and application. Background technique [0002] SO 2 It is a common air pollutant, causing serious environmental problems such as acid rain and smog. Fossil fuel combustion is man-made SO emissions 2 The main source of sulfur dioxide and nitrogen oxide pollution is currently the most urgent task in the field of air pollution control (Xu Baodong, Flue Gas Desulfurization Process Manual, 2012). Flue gas desulfurization is to control SO 2 The most effective way is of great significance. The traditional flue gas desulfurization technology is large in scale, complex in equipment, high in processing cost, easy to cause secondary pollution, and the sulfur concentration in the tail gas is still high. Electro-oxidation desulfurization technology is to reduce SO 2 It is oxidized to sulfuric acid at the anode ( Tezcan 2007) Or realize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/04B01J29/76B01J29/03B01J27/24B01J35/10B01D53/86B01D53/50H01M4/90
CPCB01D53/8609H01M4/9091B01J27/24B01J29/0333B01J29/044B01J29/76B01J35/618B01J35/617B01J35/615B01J35/647Y02E60/50
Inventor 侯明赵卿蒋尚峰邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI