Patent · US Active

Method of making carbon nanotubes doped with iron, nitrogen and sulphur

US10439229B2 · kind B2 · utility

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20Claims

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Assignee

CITY UNIVERSITY OF HONG KONG · CN

Inventors

Jian Lu · Kowloon, CN
Yang Li · Santa Clara, US
Shanshan Zeng · Kowloon, CN

Key dates

Filing date	Mar 15, 2017
Grant date	Oct 8, 2019
Priority date	—
Expiry date	Mar 15, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH01M12/06
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of making carbon nanotubes doped with iron, nitrogen and sulfur for an oxygen reduction reaction catalyst includes the steps of mixing an iron containing oxidizing agent with a sulfur-containing dye to form a fibrous fluctuate of reactive templates and using these for in-situ polymerization of an azo compound to form polymer-dye nanotubes, adding an alkali to precipitate magnetite, and subjecting the nanotubes to pyrolysis, acid leaching, and heat treatment.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.