文献类型：专利

英文题名：Double-noble metal platinum-gold alloy-loaded nano-composite titania particles used as catalyst for oxidation of carbon monoxide, comprises platinum-gold alloy that is loaded on surface of titania nanoparticles

作者：HU Y;LI C;XU N;LI W;LU L

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN106000402-A

申请日：2016-05-30

公开日：2016-10-12

语种：英文

收录：DERWENT

摘要：NOVELTY - A double-noble metal platinum-gold alloy-loaded nano-composite titania particles comprises double noble metal in the form of platinum-gold alloy that is loaded on the surface of titania nanoparticles. The composite particles have a particle diameter of 10-20 nm. The loading amount of the noble metal is in the range of 0.5-2 mol.% of titanium. The noble metal is nanocrystalline particles having particle size of 2-3 nm. The molar ratio of platinum and gold in platinum-gold alloy is 0.2-0.8. The noble metal alloy particles are uniformly dispersed on the surface of titania particles. USE - Double-noble metal platinum-gold alloy-loaded nano-composite titania particles used as catalyst for oxidation of carbon monoxide (claimed). ADVANTAGE - The double-noble metal platinum-gold alloy-loaded nano-composite titania particles has excellent catalytic activity, and high temperature thermal stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of platinum-gold alloy-loaded nano-composite titania particles, which involves (i) using 0.1-1.0 mol/l titanium source as a carrier precursor, adding an ethanol solution comprising chloroplatinic acid and chloroauric acid as a precious metal precursor into organic solvent, ultrasonically dispersing for 10-30 minutes to obtain a precursor solution, (ii) making the precursor solution into fine droplets at a rate of 2-8 ml/minute by using a peristaltic pump or a syringe pump through a gas-assisted shear atomizing burner, combusting with hydrogen/oxygen diffusion flame, pyrolyzing, oxidizing, and collecting nano powder with vacuum pump assisted glass fiber membrane, where the external gas is oxygen, the shear pressure of the shear atomizing burner opening is 0.1-0.25 MPa, the flow rate of hydrogen in the gas flow rate of hydrogen/oxygen diffusion flame is 80-150 l/hour, oxygen flow rate is 600-1200 l/hour, the maximum temperature of combustion flame area is 2200 degrees C, the titanium source is tetrabutyl titanate, ethyl titanate, butyl titanate, and/or tetraisopropyl titanate, the noble metal precursor is an ethanol solution comprising chloroplatinic acid and chloroauric acid in a ratio of 0.2-0.8, the precious metal content is 0.5-2% of the titanium source, and the organic solvent is ethanol, toluene, xylene, n-octanoic acid, and/or propionic acid.