Functionalized metal chalcogenides

Patent metadata

Field	Value
Publication number	US-2019177550-A1
Application number	US-201816211622-A
Country	US
Kind code	A1
Filing date	Dec 6, 2018
Priority date	Dec 7, 2017
Publication date	Jun 13, 2019
Grant date	—

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 having a surface; and a ligand, wherein: the ligand is covalently bound to the surface.

2 . The composition of claim 1 , wherein:
the metal chalcogenide is defined by MXz, Z is between 1 and 3, inclusively, M comprises 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, or Mn, and X comprises at least one of S, Se, or Te.

3 . The composition of claim 2 , wherein the metal chalcogenide comprises at least one of WTe 2 , WSe 2 , WS 2 , MoS 2 , MoSe 2 , or MoTe 2 .

4 . The composition of claim 3 , wherein the metal chalcogenide comprises at least one of ScS 2 , ScSe 2 , SeTe 2 , ZrS 2 , ZrSe 2 , HfS 2 , HFSe 2 , HfS 3 , HfSe 3 , ZrS 3 , ZrSe 3 , ZrTe 3 , TiS 2 , TiS 3 , TiSe 3 , NbS 2 , NbSe 2 , NbS 3 , TaS 2 , TaSe 2 , TaS 3 , TaSe 3 , VS 2 , VSe 2 , MoReS 2 , CrS 2 , WSSe 2 , MoSSe, MoWSe 2 , MoTe 2 , WTe 2 , WS 2 , MoS 2 , MoSe 2 , MoTe 2 , ReS 2 , ReSe 2 , ReNbS 2 , ReNbSe 2 , PtS 2 , PtSe 2 , PtTe 2 , FeSe, CuS, CuSbS 2 , CuInS 2 , CuInSe 2 , ZnS, ZnSe, CdS, CdSe, FePS 3 , FePSe 3 , MnPS 3 , MnPSe 3 , CdPS 3 , or CdPSe 3 .

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

6 . The composition of claim 5 , wherein the sheet comprises at least one monolayer of the metal chalcogenide.

7 . The composition of claim 5 , wherein the sheet has a thickness between 5.0 nm and 30 nm.

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

9 . 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 workfunction.

10 . The composition of claim 1 , wherein the ligand comprises a moiety comprising at least one of a halogen, an amine, an amide, a ketone, thiol, or a nitro group.

11 . The composition of claim 10 , wherein the ligand further comprises an intermediate group comprising at least one of an aromatic group, a saturated hydrocarbon chain, or an unsaturated hydrocarbon chain.

12 . The composition of claim 11 , wherein the aromatic group is a phenyl ring (Ph).

13 . The composition of claim 12 , wherein:
the ligand comprises at least one of NO 2 Ph, ClPh, BrPh, OCH 3 Ph, or (CH 3 CH 2 ) 2 NPh, and the moiety is in at least one of the ortho position, the meta position, or the para position of the phenyl ring.

14 . The composition of claim 13 , wherein the ligand comprises at least one of p-NO 2 Ph, 3,5-Cl 2 Ph, p-BrPh, p-OCH 3 Ph, or p-(CH 3 CH 2 ) 2 NPh

15 . The composition of claim 1 , wherein the metal chalcogenide is in a substantially crystalline phase.

16 . The composition of claim 15 , wherein at least a portion of the crystalline phase comprises a 1 T metallic phase.

17 . The composition of claim 9 , wherein the Hammett parameter is between −0.5 and 1.0.

18 . The composition of claim 9 , wherein the workfunction is between 3.0 eV and 6.0 eV.

19 . 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.

20 . 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 p-NO 2 Ph-, 3,5-Cl 2 Ph-, p-BrPh-, p-OCH 3 Ph-, and p-(CH 3 CH 2 ) 2 NPh-, the MoS 2 is it least partially in a 1 T crystalline phase and maintains the 1 T crystalline phase for at least two hours, 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

• C01P2004/02

  obtained by optical microscopy · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/85

  by XPS, EDX or EDAX data · CPC title

• C01P2002/82

  by IR- or Raman-data · CPC title

• C01P2006/40

  Electric properties · CPC title