Single-phase oxide for hydrogen storage having tio2 crystal phase and method of preparing the same

Patent metadata

Field	Value
Publication number	US-2019300363-A1
Application number	US-201816157576-A
Country	US
Kind code	A1
Filing date	Oct 11, 2018
Priority date	Mar 27, 2018
Publication date	Oct 3, 2019
Grant date	—

Abstract

Disclosed is a method of preparing an oxide for hydrogen storage, including a) mixing and calcining vanadium oxide and titanium oxide, b) impregnating the oxide obtained in step a) with a noble metal precursor aqueous solution, and c) subjecting the oxide obtained in step b) to heat treatment in a reducing atmosphere, wherein the oxide obtained in step a) has the composition of Chemical Formula 1 below and is composed of a single-phase TiO 2 crystal phase:
V 1-x Ti x O 2   [Chemical Formula 1]
(in Chemical Formula 1, 0.05≤x≤0.95).

First claim

What is claimed is:

1 . A method of preparing an oxide for hydrogen storage, comprising:
a) mixing and calcining vanadium oxide and titanium oxide; b) impregnating the oxide obtained in step a) with a noble metal precursor aqueous solution; and c) subjecting the oxide obtained in step b) to heat treatment in a reducing atmosphere, wherein the oxide obtained in step a) has a composition of Chemical Formula 1 below and is composed of a single-phase TiO 2 crystal phase:
V 1-x Ti x O 2   [Chemical Formula 1]

(in Chemical Formula 1, 0.05≤x≤0.95).

2 . The method of claim 1 , wherein the vanadium oxide is at least one selected from among VO, VO 2 , V 2 O 3 and V 2 O 5 .

3 . The method of claim 1 , wherein the calcining in step a) is performed at a temperature ranging from 400 to 1300° C.

4 . The method of claim 1 , wherein the noble metal precursor aqueous solution in step b) includes a water-soluble salt of at least one selected from among platinum, palladium and rhodium.

5 . The method of claim 1 , wherein the heat treatment in step c) is performed at a temperature ranging from 400 to 700° C.

6 . The method of claim 1 , wherein the oxide for hydrogen storage is loaded with 0.1 to 2 wt % of a noble metal, after step c).

7 . The method of claim 1 , wherein the TiO 2 crystal phase is a rutile crystal structure.

8 . The method of claim 1 , wherein step a) comprises:
mixing vanadium oxide and titanium oxide and performing primary calcination in air; and cooling the primarily calcined oxide and then performing secondary calcination in air or in a reducing atmosphere.

9 . The method of claim 8 , wherein the primary calcination is performed at 400 to 700° C.

10 . The method of claim 8 , wherein the secondary calcination is performed at 400 to 700° C.

11 . An oxide for hydrogen storage, composed of a single-phase TiO 2 crystal phase and represented by Chemical Formula 1 below:
V 1-x Ti x O 2   [Chemical Formula 1]
(in Chemical Formula 1, 0.05≤x≤0.95).

Assignees

• Korea Res Inst Standards & Sci

Inventors

• Baek Seung Wook
• Kim Jung Hyun
• Ahn Chang Ho
• Kim Mee Kyung
• Park Gyo Ri
• Song Sun Woong
• Jung Ki Chae

Classifications

• C01B3/001 Primary

  characterised by the uptaking media; Treatment thereof · CPC title

• C01G31/00 Primary

  Compounds of vanadium · CPC title

• C01P2002/54

  one element only · CPC title

• C01G31/006

  Compounds containing vanadium, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01P2006/40

  Electric properties · CPC title