Functionalized metal chalcogenides of partially it crystalline phase

Patent metadata

Field	Value
Publication number	US-11028271-B2
Application number	US-201816211622-A
Country	US
Kind code	B2
Filing date	Dec 6, 2018
Priority date	Dec 7, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

The present disclosure relates to a composition that includes a metal chalcogenide having a surface and a ligand, where the ligand is covalently bound to the surface. In some embodiments of the present disclosure, the metal chalcogenide may be defined by MXz, where Z is between 1 and 3, inclusively, M (a metal) includes at least one of Sc, Zr, Hf, Zr, Ti, Nb, Ta, V, Mo, Cr, Re, W, S, Pt, Fe, Cu, Sb, In, Zn, Cd, P, and/or Mn, and X (a chalcogenide) includes at least one of S, Se, and/or Te.

First claim

What is claimed is:

1. A composition comprising:
a metal chalcogenide comprising MoS 2 having a surface; and
a ligand comprising a phenyl ring and a moiety, wherein:
the MoS 2 is at least partially in a 1T crystalline phase,
the ligand is covalently bound to the surface, and
the moiety comprises at least one of a halogen or (CH 3 CH 2 ) 2 N.

2. The composition of claim 1 , wherein the metal chalcogenide is in a form comprising at least one of a sheet or a particle.

3. The composition of claim 2 , wherein the sheet comprises at least one monolayer of the metal chalcogenide.

4. The composition of claim 2 , wherein the sheet has a thickness between 5.0 nm and 30 nm.

5. The composition of claim 2 , wherein the particle has a characteristic length between 5.0 nm and 50,000 nm.

6. The composition of claim 1 , wherein the ligand comprises at least one of Cl 2 Ph or BrPh.

7. The composition of claim 1 , wherein the ligand comprises at least one of an electron donating functional group or an electron withdrawing functional group, as measured by at least one of a Hammett parameter or a work function.

8. The composition of claim 7 , wherein the Hammett parameter is between −0.5 and 1.0.

9. The composition of claim 7 , wherein the work function is between 3.0 eV and 6.0 eV.

10. The composition of claim 1 , wherein:
the composition catalyzes the hydrogen evolution reaction (HER), and
the composition generates a HER catalytic current density of at least 10 mA/cm 2 when provided with an overpotential of less than 1000 mV.

11. A composition comprising:
MoS 2 in a form of at least one of a particle or a sheet; and
a ligand covalently bound to the MoS 2 , wherein:
the ligand comprises at least one of 3,5-Cl 2 Ph, p-BrPh, or p-(CH 3 CH 2 ) 2 NPh, where Ph is a phenyl ring,
the MoS 2 is it least partially in a 1T crystalline phase,
the form has a characteristic length between 5.0 nm and 50,000 nm,
the composition is characterized by a Hammett parameter between −0.5 and 1.0,
the composition catalyzes the hydrogen evolution reaction (HER), and
the composition generates a HER catalytic current density of about 10 mA/cm 2 when provided with an overpotential of less than 1000 mV.

Assignees

• Alliance Sustainable Energy

Inventors

• Zhang Hanyu
• Benson Eric Edward
• Blackburn Jeffrey Lee
• Link Elisa Margaret

Classifications

• C01P2002/85

  by XPS, EDX or EDAX data · CPC title

• C01P2004/02

  obtained by optical microscopy · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C09C1/0003 Primary

  Compounds of molybdenum (C09C1/0015 takes precedence) · CPC title

• C01P2006/40

  Electric properties · CPC title