Catalyst containing au-pt alloy, method for preparing thereof and methods for synthesizing of hydrogen peroxide using the same

Patent metadata

Field	Value
Publication number	US-2019366302-A1
Application number	US-201816217719-A
Country	US
Kind code	A1
Filing date	Dec 12, 2018
Priority date	Jun 1, 2018
Publication date	Dec 5, 2019
Grant date	—

Abstract

A catalyst, a method for preparing thereof, and methods for synthesizing of hydrogen peroxide are disclosed. The catalyst contains an alloy of two elements. Herein, the elements are Au(Aurum) and Pt(Platinum). The method for preparing the catalyst containing the Au—Pt alloy, includes steps of: (a) obtaining a first solution by dissolving dispersing agent and reducing agent into a first solvent; and (b) synthesizing the Au—Pt alloy by adding Au precursor and Pt precursor into the first solution. Herein, the step (b) includes steps of: (b-1) obtaining a second solution by dissolving the Au precursor and the Pt precursor into a second solvent; and (b-2) synthesizing the Au—Pt alloy by adding the second solution into the first solution.

First claim

What is claimed is:

1 . A catalyst, containing: an alloy of two elements, wherein the elements are Au(Aurum) and Pt(Platinum).

2 . The catalyst of claim 1 , wherein the alloy forms solid solution.

3 . The catalyst of claim 1 , wherein the alloy has a face-centered tetragonal structure.

4 . The catalyst of claim 1 , wherein the alloy catalyzes direct synthesis reaction of hydrogen peroxide(H 2 O 2 ).

5 . The catalyst of claim 1 , wherein a molecular formula of the alloy is represented as Au x Pt (100-x) , and wherein the X satisfies no less than 22 and no more than 97.

6 . The catalyst of claim 1 , wherein a molecular formula of the alloy is represented as Au x Pt (100-x) , and wherein the X satisfies no less than 27 and no more than 97.

7 . A method for preparing a catalyst containing an Au—Pt alloy, comprising steps of:
(a) obtaining a first solution by dissolving dispersing agent and reducing agent into a first solvent; and
(b) synthesizing the Au—Pt alloy by adding Au precursor and Pt precursor into the first solution.

8 . The method of claim 7 , wherein the step (b) includes steps of:
(b-1) obtaining a second solution by dissolving the Au precursor and the Pt precursor into a second solvent; and (b-2) synthesizing the Au—Pt alloy by adding the second solution into the first solution.

9 . The method of claim 8 , wherein, at the step of (b-2), the second solution is allowed to be dropped into the first solution.

10 . The method of claim 7 , wherein the step (b) is carried out at a temperature near 0° C.

11 . The method of claim 7 , wherein the reducing agent contains one or more substances selected from a group of NaBH 4 (Sodium Borohydride), Butyllithium, and Ascorbic Acid.

12 . The method of claim 7 , wherein the dispersing agent contains one or more substances selected from a group of PVP(Polyvinylpyrrolidone), Oleylamine, and CTAB.

13 . The method of claim 7 , wherein the Au—Pt alloy forms solid solution.

14 . The method of claim 7 , wherein the Au—Pt alloy catalyzes direct synthesis reaction of hydrogen peroxide(H 2 O 2 ).

15 . The method of claim 7 , further comprises a step of: (c) washing the Au—Pt alloy synthesized at the step of (b).

16 . A method for synthesizing hydrogen peroxide, wherein the hydrogen peroxide is synthesized by using an Au—Pt catalyst.

Assignees

• Korea Inst Sci & Tech

Inventors

• Lee Seung Yong
• Han Sang Soo
• Nam Hyo Bin
• Lee Hong Woo
• Cho So Hye
• Jang Ho Seong

Classifications

• B01J23/66 Primary

  Silver or gold · CPC title

• C22C5/04

  Alloys based on a platinum group metal · CPC title

• B01J37/16

  Reducing · CPC title

• B01J37/06

  Washing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J37/0018

  Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat) · CPC title