Ruthenium and nitrogen doped carbon matrix catalyst and methods for making and using thereof

Patent metadata

Field	Value
Publication number	US-2021355588-A1
Application number	US-201917282156-A
Country	US
Kind code	A1
Filing date	Sep 27, 2019
Priority date	Oct 2, 2018
Publication date	Nov 18, 2021
Grant date	—

Abstract

A catalyst nanocomposite and methods of making the same. The catalyst nanocomposite includes a substrate; and a coating disposed on the substrate, the coating having a ruthenium and nitrogen co-doped carbon matrix. The coating may be melamine and formaldehyde and produced via pyrolizing the melamine and formaldehyde on a nanowire made of metals such as tellurium.

First claim

What is claimed is:

1 . A catalyst nanocomposite comprising:
a substrate; and a coating disposed on the substrate, the coating having a ruthenium and nitrogen co-doped carbon matrix.

2 . The catalyst nanocomposite according to claim 1 , wherein the substrate is a nanowire having a length from about 100 nm to about 10,000 nm and a cross section from about 10 nm to about 100 nm.

3 . The catalyst nanocomposite according to claim 2 , wherein the nanowire is metal including at least one of tellurium, copper, silver, gold, iron, silicon, zinc, germanium, antimony, oxides or alloys thereof.

4 . The catalyst nanocomposite according to claim 1 , wherein the coating is a melamine-formaldehyde polymer.

5 . The catalyst nanocomposite according to claim 1 , wherein ruthenium is present in the carbon matrix as nanoparticle species and atomic species.

6 . The catalyst nanocomposite according to claim 5 , wherein a ratio of the atomic species to the nanoparticle species is from about 0.3 to about 0.5.

7 . The catalyst nanocomposite according to claim 5 , wherein a ratio of the atomic species to the nanoparticle species is from about 0.35 to about 0.45.

8 . A method for forming a catalyst nanocomposite, the method comprising:
forming a coating on a substrate; reacting the substrate having the coating with a catalyst metal halide salt to incorporate catalyst metal atoms into the resin; and pyrolizing the substrate having the coating and the catalyst metal atoms to form a catalyst metal atom and nitrogen co-doped carbon matrix.

9 . The method according to claim 8 , further comprising forming a plurality of nanowires, each of the nanowires acting as the substrate and having a length from about 100 nm to about 10,000 nm and a cross section from about 10 nm to about 100 nm.

10 . The method according to claim 9 , wherein the plurality of nanowires are formed from a metal including at least one of tellurium, copper, silver, gold, iron, silicon, zinc, germanium, antimony, oxides or alloys thereof.

11 . The method according to claim 8 , wherein forming the resin includes polymerizing melamine and formaldehyde to form a melamine-formaldehyde polymer.

12 . The method according to claim 8 , wherein pyrolizing the substrate having the coating and the catalyst metal atoms includes heating the substrate having the coating and the catalyst metal atoms to a temperature from about 500° C. to about 800° C.

13 . The method according to claim 8 , wherein the catalyst metal is ruthenium.

14 . The method according to claim 13 , wherein ruthenium is present in the carbon matrix as nanoparticle species and atomic species.

15 . The method according to claim 14 , wherein a ratio of the atomic species to the nanoparticle species is from about 0.3 to about 0.5.

16 . The method according to claim 15 , wherein a ratio of the atomic species to the nanoparticle species is from about 0.35 to about 0.45.

17 . A method for producing hydrogen, the method comprising:
contacting at least one hydrogen-containing compound to a catalyst composition under conditions suitable for dehydrogenating the at least hydrogen-containing compound to form hydrogen, wherein the catalyst composition includes a substrate having a coating, which includes a ruthenium and nitrogen co-doped carbon matrix.

18 . The method according to claim 17 , wherein the substrate is a nanowire having a length from about 100 nm to about 10,000 nm and a cross section from about 10 nm to about 100 nm and the nanowire is metal including at least one of tellurium, copper, silver, gold, iron, silicon, zinc, germanium, antimony, oxides or alloys thereof.

19 . The method according to claim 17 , wherein the coating is a melamine-formaldehyde polymer.

20 . The method according to claim 17 , wherein ruthenium is present in the carbon matrix as nanoparticle species and atomic species at a ratio of the atomic species to the nanoparticle species from about 0.3 to about 0.5.

Assignees

• Univ California

Inventors

• Chen Shaowei
• Lu Bingzhang
• Guo Lin
• Peng Yi
• Lu jia-en

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J27/20 Primary

  Carbon compounds · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• C25B1/04

  by electrolysis of water · CPC title

• B01J21/185

  Carbon nanotubes (carbon nanotubes per se C01B32/15) · CPC title