Carbon-doped nickel oxide catalyst and methods for making and using thereof

Patent metadata

Field	Value
Publication number	US-2021220803-A1
Application number	US-202117153383-A
Country	US
Kind code	A1
Filing date	Jan 20, 2021
Priority date	Jan 22, 2020
Publication date	Jul 22, 2021
Grant date	—

Abstract

A catalyst composition including nickel foam and a plurality of carbon-doped nickel oxide nanorods disposed on the nickel foam.

First claim

What is claimed is:

1 . A catalyst composition comprising:
nickel foam; and a plurality of carbon-doped nickel oxide nanorods disposed on the nickel foam.

2 . The catalyst composition according to claim 1 , wherein each of the carbon-doped nickel oxide nanorods includes a plurality of nanoparticle subunits each having a core covered by a carbon-doped nickel oxide shell.

3 . The catalyst composition according to claim 2 , wherein the core consists substantially of nickel.

4 . The catalyst composition according to claim 2 , wherein the carbon-doped nickel oxide shell consists substantially of nickel oxide.

5 . The catalyst composition according to claim 4 , wherein the carbon-doped nickel oxide shell includes a carbon-doped surface.

6 . The catalyst composition according to claim 5 , wherein the carbon-doped surface includes a carbon atom bonded to three oxygen atoms in a same plane.

7 . The catalyst composition according to claim 5 , wherein the carbon-doped surface includes a carbon atom that substitutionally replaced a third-layer 6-ccordinate nickel atom in the nickel oxide.

8 . The catalyst composition according to claim 1 , wherein the catalyst composition has an overpotential of about 27 millivolts at a geometric current density of about 10 milliamps per square centimeter.

9 . A method for forming a catalyst composition, the method comprising:
anodizing nickel foam to form an anodized nickel foam having a plurality of NiC 2 O 4 .2H 2 O bulk crystals on the nickel foam; and annealing the anodized nickel foam to form a plurality of carbon-doped nickel oxide nanorods.

10 . The method according to claim 9 , wherein annealing the anodized nickel foam includes changing morphology of the plurality of NiC 2 O 4 .2H 2 O bulk crystals into the plurality of carbon-doped nickel oxide nanorods.

11 . The method according to claim 10 , wherein anodizing the nickel foam includes anodizing the nickel foam with a nickel electrode in an oxalic acid solution.

12 . The method according to claim 11 , wherein anodizing the nickel foam is performed at a temperature from about −10° C. to about 0° C. at a constant voltage from about 100 V to about 30 V for a period of time from about 20 minutes to about 5 minutes.

13 . The method according to claim 9 , wherein the nickel foam has a bulk density from about 400 grams per square meter to about 300 grams per square meter.

14 . The method according to claim 9 , wherein annealing is performed in an argon atmosphere at a temperature from about 500° C. to about 300° C. for a period of time from about 1 hour to about 30 minutes.

15 . A method for producing hydrogen, the method comprising:
contacting at least one hydrogen-containing compound with a catalyst composition under conditions suitable for dehydrogenating the at least hydrogen-containing compound to form hydrogen, wherein the catalyst composition includes: nickel foam; and a plurality of carbon-doped nickel oxide nanorods disposed on the nickel foam.

16 . The method according to claim 15 , wherein each of the carbon-doped nickel oxide nanorods includes a plurality of nanoparticle subunits each having a core covered by a carbon-doped nickel oxide shell.

17 . The method according to claim 16 , wherein the core consists substantially of nickel and the carbon-doped nickel oxide shell consists substantially of nickel oxide and includes a carbon-doped surface.

18 . The method according to claim 17 , wherein the carbon-doped surface includes a carbon atom bonded to three oxygen atoms in a same plane.

19 . The method according to claim 18 , wherein the carbon-doped surface includes a carbon atom that substitutionally replaced a third-layer 6-ccordinate nickel atom in the nickel oxide.

Assignees

• Univ California

Inventors

• Li Yat
• Kou tianyi
• Chen Mingpeng

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• Y02E60/36

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

• C25B11/052

  Electrodes comprising one or more electrocatalytic coatings on a substrate · CPC title