Preparation method of Ir and Ir-Pt/C alloy nano-catalyst with high dispersion and high load capacity

A nano-catalyst, high-dispersion technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the technical difficulties of Ir and Ir alloy nano-catalysts, Ir and Ir Ir-based alloy nanoparticles are large in size and difficult to reduce Ir precursor compounds, etc., to achieve good industrial application prospects, increase specific surface area, and low equipment requirements.
CN101966458BInactive Publication Date: 2013-01-16KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2013-01-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of an Ir and Ir-Pt / C alloy nano-catalyst with high dispersion and high load capacity by using carbon black as a carrier and Ir or Ir-Pt alloy nanoparticles as an active ingredient. The preparation method of the Ir and Ir-Pt / C alloy nano-catalyst with high dispersion and high load capacity is characterized in that a high-pressure hydrogen reduction method is utilized, and the carbon black modified by KBH4 is used as the carrier to reduce an Ir or Ir-Pt precursor compound; and the Ir or Ir-Pt alloy nanoparticles are deposited on the surface of the modified carbon black to obtain the Ir / C or Ir-Pt / C catalyst with high dispersion and high load capacity. The catalyst obtained by using the method of the invention has high Ir or Ir-Pt load ratio, controllable Ir or Ir-Pt load capacity, low cost, simple process and low equipment requirement and can prepare the Ir / C or Ir-Pt / C catalyst with the mass ratio ranging from 5 percent to 4 percent. The Ir / C or Ir-Pt / C nano-catalyst can be applied to chemical process, fuel batteries, aerospace engineering, pollution and emission control, biological engineering, and the other fields .
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Description

technical field

[0001] The present invention relates to the preparation of a new, economical, simple and industrially-realizable high-activity carbon-supported Ir and Ir-Pt alloy nanocatalyst, specifically using modified carbon black as a carrier to prepare carbon-supported Ir and Ir-Pt alloys. A method for Pt alloy nanocatalysts. Background technique

[0002] Iridium is mainly used as a catalyst for hydrogenation of unsaturated hydrocarbons, hydrazine decomposition, and automobile exhaust purification. It is also used for methanol cracking, CO oxidation, and NH 3 decomposition etc. At present, nano-Ir and Ir-Pt alloy catalysts have shown broad application prospects in chemical process, fuel cell, aerospace engineering, pollution and emission control, bioengineering and other fields, and related patent applications are showing an increasing trend.

[0003] Because nano-Ir and Ir-based catalysts need to control the size of Ir and Ir alloy nanoparticles, better catalytic act...

Claims

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