JP2012161751A5

JP2012161751A5 -

Info

Publication number: JP2012161751A5
Application number: JP2011024667A
Authority: JP
Filing date: 2011-02-08
Publication date: 2014-03-27
Anticipated expiration: 2031-02-08

Description

本発明の触媒の製造方法では、粉末状とした強誘電体の表面に金属を担持させて成る触媒の製造方法であって、粉末状とした強誘電体と粉末状とした金属とを混合して混合物を作製する混合工程と、混合物を撹拌しながら焼成する焼成工程とを有するものである。 The method for producing a catalyst of the present invention is a method for producing a catalyst in which a metal is supported on the surface of a pulverized ferroelectric material, in which the pulverized ferroelectric material and the powdered metal are mixed. A mixing step for producing a mixture and a firing step for firing the mixture while stirring.

さらに、本発明の触媒の製造方法では、以下の点にも特徴を有するものである。
（１）焼成工程の後、強誘電体に担持されなかった金属を酸性溶液またはアルカリ性溶液に溶解させる洗浄工程を有すること。
（２）強誘電体が、ペロブスカイト型の酸素八面体構造を有する酸化物またはその固溶体であること。
（３）強誘電体が、(RMbO_3-δ)_n(MaO)_m（Ｒは、In,Sc,Y,Dy,Ho,Er,Tm,Yb,Lu,Ti,Ca,Sr,Ce,Sn,Hfから選ばれる少なくとも１種類の元素、Ma,Mbは、Ti,Mn,Fe,Co,Cu,Ga,Zn,Al,Mg,Cdから重複を許して選ばれる少なくとも１種類の元素、ｎは１以上の整数、ｍは０以上の整数、δは０以上0.2以下の実数）と表される酸化物またはその固溶体であること。 Furthermore, the method for producing a catalyst of the present invention is also characterized by the following points.
(1) After the firing step, a cleaning step of dissolving the metal not supported on the ferroelectric in an acidic solution or an alkaline solution is provided.
(2) The ferroelectric is an oxide having a perovskite oxygen octahedral structure or a solid solution thereof.
(3) Ferroelectric material is (RMbO _{3 -δ} ) _n (MaO) _m (R is In, Sc, Y, Dy, Ho, Er, Tm, Yb, Lu, Ti, Ca, Sr, Ce, Sn) , Hf, at least one element selected from Hf, Ma, Mb is at least one element selected from Ti, Mn, Fe, Co, Cu, Ga, Zn, Al, Mg, Cd allowing duplication, n is 1 or an integer, m is an integer of 0 or more, and δ is a real number of 0 or more and 0.2 or less) or a solid solution thereof.

また、本発明の触媒は、粉末状とした強誘電体と粉末状とした金属とを混合して混合物を作製し、この混合物を撹拌しながら焼成することで、粉末状とした強誘電体の表面に金属を担持させた触媒であって、強誘電体の表面に担持させた金属における、強誘電体の表面から当該金属の表面までの距離を10nm以下としているものである。 The catalyst of the present invention is a mixture of a powdered ferroelectric and a powdered metal to prepare a mixture, and the mixture is fired with stirring, whereby a powdered ferroelectric is obtained. A catalyst having a metal supported on the surface, the distance of the metal supported on the surface of the ferroelectric from the surface of the ferroelectric to the surface of the metal being 10 nm or less.

Claims

A method of producing a catalyst comprising a metal supported on a powdered ferroelectric surface,
A mixing step of mixing a powdered ferroelectric and a powdered metal to produce a mixture;
A method for producing a catalyst comprising a firing step of firing the mixture while stirring.

2. The method for producing a catalyst according to claim 1, further comprising a washing step of dissolving a metal not supported on the ferroelectric substance in an acidic solution or an alkaline solution after the firing step.

The method for producing a catalyst according to claim 1, wherein the ferroelectric is an oxide having a perovskite-type oxygen octahedral structure or a solid solution thereof.

The ferroelectric is (RMbO3 _-δ ) _n (MaO) _m (R is In, Sc, Y, Dy, Ho, Er, Tm, Yb, Lu, Ti, Ca, Sr, Ce, Sn, Hf. At least one element selected from: Ma, Mb is at least one element selected from Ti, Mn, Fe, Co, Cu, Ga, Zn, Al, Mg, and Cd, and n is 1 or more. The method for producing a catalyst according to claim 1 or 2, wherein m is an integer of 0 or more and δ is a real number of 0 or more and 0.2 or less) or a solid solution thereof.

A catalyst in which a metal is supported on the surface of a powdered ferroelectric by mixing the powdered ferroelectric and the powdered metal to prepare a mixture and firing the mixture while stirring. Because
The metal supported on the surface of the ferroelectric is a catalyst in which the distance from the surface of the ferroelectric to the surface of the metal is 10 nm or less.