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Novel catalyst with carbon-supported Pd nanoparticle embedded transition metal nanofilm structure

A technology of nano-particles and transition metals, applied in the field of new catalysts, can solve the problems of lack of Pt resources, high prices, etc., and achieve the effect of being suitable for large-scale synthesis, enhancing stability, and simple experimental methods

Inactive Publication Date: 2015-07-15
HENAN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, although Pt and Pt-based alloys are still widely used as anode or cathode catalysts in low-temperature fuel cells, the scarcity and high price of Pt resources limit its large-scale application, and the development of low-Pt loading and non-Pt electrocatalysts has always been a challenge. research hotspot

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  • Novel catalyst with carbon-supported Pd nanoparticle embedded transition metal nanofilm structure
  • Novel catalyst with carbon-supported Pd nanoparticle embedded transition metal nanofilm structure
  • Novel catalyst with carbon-supported Pd nanoparticle embedded transition metal nanofilm structure

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Embodiment 1

[0038] A method for preparing a novel catalyst in which carbon-supported Pd nanoparticles are embedded in a transition metal Co nanofilm structure, comprising the steps of:

[0039] Step 1, Co(CH 3 COO) 2 4H 2 O. Disperse XC-72 in 20mL of water and ultrasonically disperse for 30min to obtain liquid A;

[0040] Step two, 1-octyl-3-methylimidazolium hexafluorophosphate [OMIm]PF 6 Liquid and KBH 4 The aqueous solution was mixed and ultrasonically dispersed, then under the conditions of argon or nitrogen saturation, reflux and liquid seal, magnetic stirring and heating to maintain a constant temperature of 60°C to obtain liquid B; every 1.2g of 1-octyl-3-methylimidazole six Fluorophosphate [OMIm]PF 6 Add 4ml KBH to the liquid 4 aqueous solution;

[0041] Step 3: Add liquid A in step 1 to liquid B in step 2 at a rate of 2 drops per second through a constant pressure funnel, and react at a constant temperature of 60°C for 1 hour under magnetic stirring to obtain carbon-suppor...

Embodiment 2

[0048] A method for preparing a novel catalyst in which carbon-supported Pd nanoparticles are embedded in a transition metal Co nanofilm structure, comprising the steps of:

[0049] Step 1, Co(CH 3 COO) 2 4H 2 O. Disperse XC-72 in 20mL of water and ultrasonically disperse for 30min to obtain liquid A;

[0050] Step two, 1-octyl-3-methylimidazolium hexafluorophosphate [OMIm]PF 6 Liquid and KBH 4 The aqueous solution is mixed and ultrasonically dispersed, then under the conditions of argon or nitrogen saturation, reflux and liquid seal, magnetic stirring and heating to maintain a constant temperature of 60°C to obtain liquid B; every 2g of 1-octyl-3-methylimidazole hexafluoro Phosphate [OMIm]PF 6 Add 4ml KBH to the liquid 4 aqueous solution;

[0051] Step 3: Add liquid A in step 1 to liquid B in step 2 at a rate of 2 drops per second through a constant pressure funnel, and react at a constant temperature of 60°C for 1 hour under magnetic stirring to obtain carbon-supporte...

Embodiment 3

[0056] A method for preparing a novel catalyst in which carbon-supported Pd nanoparticles are embedded in a transition metal Co nanofilm structure, comprising the steps of:

[0057] Step 1, Co(CH 3 COO) 2 4H 2 O. Disperse XC-72 in 20mL of water and ultrasonically disperse for 30min to obtain liquid A;

[0058] Step two, 1-octyl-3-methylimidazolium hexafluorophosphate [OMIm]PF 6 Liquid and KBH 4 The aqueous solution is mixed and ultrasonically dispersed, then under the conditions of argon or nitrogen saturation, reflux and liquid seal, magnetic stirring and heating to maintain a constant temperature of 60°C to obtain liquid B; every 4g of 1-octyl-3-methylimidazole hexafluoro Phosphate [OMIm]PF 6 Add 4ml KBH to the liquid 4 aqueous solution;

[0059] Step 3: Add liquid A in step 1 to liquid B in step 2 at a rate of 2 drops per second through a constant pressure funnel, and react at a constant temperature of 60°C for 1 hour under magnetic stirring to obtain carbon-supporte...

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Abstract

The invention discloses a novel catalyst with a carbon-supported Pd nanoparticle embedded transition metal nanofilm structure, and belongs to the fields of nanomaterial technologies and fuel cell catalysis. A Pd nanoparticle is embedded into a transition metal nanofilm through using the interface effect between the carbon supporter surface supported transition metal nanofilm and the surface atom of the Pd nanoparticle with an ionic liquid as a solvent or protective agent, an electrostatic protective layer is formed through the adsorption performance on the surface of the metal particle, or the stable existence of metal ions is realized through the volume effect of adsorption ions. The catalyst prepared in the invention has better electrooxidation reduction activity in acidic and alkaline environment than Pd and Pd-based alloy catalysts, and has better ethanol electrooxidation catalysis activity in an alkaline system than Pd and the Pd-based alloys. The catalyst obtained in the invention has the advantages of simple preparation method, high activity and large scale production.

Description

technical field [0001] The invention belongs to the field of nanometer material technology and fuel cell catalysis, and particularly relates to a novel catalyst in which carbon-supported Pd nanoparticles are embedded in a transition metal M (Fe, Co, Ni) nanofilm structure. Background technique [0002] At present, although Pt and Pt-based alloys are still widely used as anode or cathode catalysts in low-temperature fuel cells, the scarcity and high price of Pt resources limit its large-scale application, and the development of low-Pt loading and non-Pt electrocatalysts has always been a challenge. research hotspot. Among them, Pd has been tried to be used in fuel cell catalysts due to its high reserves and low price. The catalytic oxidation performance is better than that of Pt. The development of novel structural Pd and Pd-based alloy fuel cell catalysts is a hot research topic at present. [0003] Using Pd and transition metal M (such as Fe, Co, Ni, etc.) to form a Pd-M...

Claims

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Application Information

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IPC IPC(8): B01J23/89H01M4/90
CPCY02E60/50
Inventor 陈玉梅时建朝李英杰陈萌萌张大峰杨娟
Owner HENAN POLYTECHNIC UNIV
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