Patent · US Active

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

US10910655B2 · kind B2 · utility

1Cited by

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10Claims

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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	Sep 3, 2019
Grant date	Feb 2, 2021
Priority date	—
Expiry date	Sep 3, 2039

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 sulphur for an oxygen reduction reaction catalyst includes the steps of mixing an iron containing oxidising agent with a sulphur-containing dye to form a fibrous fluctuate of reactive templates and using these for in-situ polymerisation 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.