Highly dispersed metal catalysts
AssigneeAgency for Science, Technology and Research
InventorsZiyi Zhong, Jianyi Lin
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Abstract
The present invention relates to a novel method for preparing a new type of catalyst for the oxidation of CO in a reactant gas or air. The method provides the preparation of a catalyst having nano-sized metal particles and a capping agent deposited on a solid support. The size and distribution of the metal particles can be easily controlled by adjusting reaction condition and the capping agent used. The catalyst prepared has high activity at low temperature toward selective oxidation of CO and is stable over an extended period of time. The catalyst can be used in air filter devices, hydrogen purification processes, automotive emission control devices (decomposition of NOx, x is the integer 1 or 2), F-T synthesis, preparation of fuel-cell electrode, photocatalysis and sensors.
Claims17
A method of preparing a highly dispersed catalyst, said method comprising the following sequential steps in order:
- a) generating a reaction mixture comprising a metal precursor compound, an amino acid capping agent, and a metal oxide solid support selected from the group consisting of Fe2O3, TiO2, CeO2,Al2O3, ZnO and CuO;
- b) applying sonication to the reaction mixture before and while
- adding a reducing agent to the reaction mixture to generate a plurality of metal colloidal particles;
- and
- c) depositing the plurality of metal colloidal particles onto the solid support to prepare a highly dispersed catalyst under sonication.
A method of preparing a highly dispersed catalyst, said method comprising the following sequential steps in order:
- a) contacting a metal precursor compound with an amino acid capping agent and a metal oxide catalyst support selected from the group consisting of Fe2O3, TiO2, CeO2, Al2O3, ZnO and CuO to generate a reaction mixture;
- b) applying sonication to the reaction mixture before and while
- adding a reducing agent to the reaction mixture while the reaction mixture is being sonicated to generate a plurality of metal colloidal particles;
- and
- c) depositing the plurality of metal colloid particles under sonication onto a the metal oxide catalyst support to prepare a highly dispersed catalyst.
Dependencies are inferred from the claim text.