Nanocatalyst for anode of solid oxide fuel cell and preparation method thereof

Patent metadata

Field	Value
Publication number	US-2019296366-A1
Application number	US-201916256905-A
Country	US
Kind code	A1
Filing date	Jan 24, 2019
Priority date	Mar 26, 2018
Publication date	Sep 26, 2019
Grant date	—

Abstract

The present disclosure relates to a nanocatalyst for an anode of a solid oxide fuel cell and a method for preparing the same. More particularly, the present disclosure relates to a nanocatalyst for an anode of a solid oxide fuel cell obtained by forming a ceramic nanocatalyst including a noble metal dispersed therein in an atomic unit and contained in an ionic state having an oxidation number other than 0 through an in situ infiltration process in the internal pores of a porous electrode, and to application of the nanocatalyst to a solid oxide fuel cell having significantly higher electrochemical characteristics as compared to the solid oxide fuel cells including the conventional nickel-based anode and oxide anode, and particularly showing excellent characteristics at an intermediate or low temperature of 600° C. or less.

First claim

What is claimed is:

1 . A nanocatalyst for an anode of a solid oxide fuel cell formed in the internal pores of a porous electrode, wherein the nanocatalyst is doped with a plurality of metal particles dispersed on a ceramic surface, the metal is at least one selected from Pt, Au, Ag, Pd, Ir, Rh, Ru, Pd and Os, and the ceramic is fluorite represented by the following Chemical Formula 1:
A 1-a-b Ce a Zr b O 2-δ   [Chemical Formula 1]
wherein A is at least one selected from Y, Sc, Gd, Sm, La, Nb, Nd, Pr, Yb, Er, Tb and Ca, and each of a, b and δ is a real number satisfying 0≤a≤1, 0≤b≤1 and 0≤δ≤ 1 .

2 . The nanocatalyst for an anode of a solid oxide fuel cell according to claim 1 , wherein the metal is present in an amount of 2-6 mol % based on the nanocatalyst.

3 . The nanocatalyst for an anode of a solid oxide fuel cell according to claim 1 , wherein the nanocatalyst has a size of 30-40 nm, and the metal particles have a size of 0.1-1 nm.

4 . The nanocatalyst for an anode of a solid oxide fuel cell according to claim 1 , wherein the metal particles are present in an ionic form or in a mixed form of ions with metal.

5 . The nanocatalyst for an anode of a solid oxide fuel cell according to claim 4 , wherein the metal particles are present in a mixed form of ions with metal, and the ratio of the ionic species is 30-100 wt % based on the total weight of the metallic component, as determined by X-ray photoelectron spectroscopy (XPS).

6 . The nanocatalyst for an anode of a solid oxide fuel cell according to claim 1 ,
Wherein the nanocatalyst includes the metal in an amount of 2-6 mol %; the nanocatalyst has a size of 30-40 nm; the metal particles have a size of 0.1-1 nm; the metal particles are present in an mixed form of ions with metal; and the ratio of the ionic species is 30-100 wt % based on the total weight of the metallic component, as determined by XPS analysis.

Assignees

• Korea Inst Sci & Tech
• Univ Hanyang Ind Univ Coop Found

Inventors

• Yoon Kyung Joong
• Lee Yun Jung
• Shin Ji-Su
• Park Mansoo
• Ji Ho Il
• Kim Hyoungchul
• Son Ji-Won
• Lee Jong Ho
• Kim Byung Kook
• Lee Hae-Weon

Classifications

• H01M4/8621

  containing only metallic or ceramic material, e.g. made by sintering or sputtering · CPC title

• H01M4/9058

  of noble metals or noble-metal based alloys · CPC title

• H01M4/9066

  of metal-ceramic composites or mixtures, e.g. cermets · CPC title

• H01M8/1253

  the electrolyte containing zirconium oxide · CPC title

• H01M8/126

  the electrolyte containing cerium oxide · CPC title