Methods for producing alpha-keto acid and pyruvic acid

Patent metadata

Field	Value
Publication number	US-12148933-B2
Application number	US-202318367719-A
Country	US
Kind code	B2
Filing date	Sep 13, 2023
Priority date	Mar 5, 2018
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

An electrode catalyst of the present invention contains an electrically conductive material carrying a metal or a metal oxide, and has an electrical conductivity at 30° C. of 1×10 −13 Scm −1 or more.

First claim

What is claimed is:

1. A fuel cell comprising an anode, a cathode and an electrolyte, wherein the anode comprises an electrode catalyst comprising an electrically conductive material carrying a metal or a metal oxide, and having an electrical conductivity at 30° 0 C. of 1×10 −13 Scm −1 or more;
said metal is one or more transition metals and said metal oxide is an oxide of a transition metal; and
said electrolyte has proton conductivity; and
wherein an a-hydroxycarboxylic acid contacts the anode to generate protons and electrons;
the protons move in the electrolyte and reach the cathode; and
the protons and oxygen are reacted on the cathode to produce water.

2. An energy recovery system for recovering surplus electric power energy, the system comprising:
a container for storing an a-keto carboxylic acid;
a container for storing an a-hydroxycarboxylic acid; and
a means for electrochemically oxidizing said a-hydroxycarboxylic acid to produce said α-α-keto carboxylic acid and generating electric power,
wherein said means comprise an anode;
wherein the anode comprises an electrode catalyst comprising an electrically conductive material carrying a metal or a metal oxide, and having an electrical conductivity at 30° C. of 1×10 −13 Scm −1 or more;
said metal is one or more transition metals and said metal oxide is an oxide of a transition metal; and
wherein the a-hydroxycarboxylic acid contacts the anode to generate protons and electrons.

3. A power generation method for generating electric power using the fuel cell of claim 1 .

Assignees

• Japan Science & Tech Agency

Inventors

• Yamauchi Miho
• MORIMOTO Tatsuyoshi

Classifications

• C07C51/16

  by oxidation (C07C51/145 takes precedence) · CPC title

• C07C59/19

  Pyruvic acid · CPC title

• H01M4/9041

  Metals or alloys (H01M4/92 takes precedence) · CPC title

• H01M8/1013

  Other direct alcohol fuel cells [DAFC] · CPC title

• C25B5/00

  Electrogenerative processes, i.e. processes for producing compounds in which electricity is generated simultaneously · CPC title