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Title: Molecular metal-Oxo catalysts for generating hydrogen from water

Abstract

A composition of matter suitable for the generation of hydrogen from water is described, the positively charged cation of the composition having the general formula [(PY5W.sub.2)MO].sup.2+, wherein PY5W.sub.2 is (NC.sub.5XYZ)(NC.sub.5H.sub.4).sub.4C.sub.2W.sub.2, M is a transition metal, and W, X, Y, and Z can be H, R, a halide, CF.sub.3, or SiR.sub.3, where R can be an alkyl or aryl group. The two accompanying counter anions, in one embodiment, can be selected from the following Cl.sup.-, I.sup.-, PF.sub.6.sup.-, and CF.sub.3SO.sub.3.sup.-. In embodiments of the invention, water, such as tap water containing electrolyte or straight sea water can be subject to an electric potential of between 1.0 V and 1.4 V relative to the standard hydrogen electrode, which at pH 7 corresponds to an overpotential of 0.6 to 1.0 V, with the result being, among other things, the generation of hydrogen with an optimal turnover frequency of ca. 1.5 million mol H.sub.2/mol catalyst per h.

Inventors:
; ;
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1171094
Patent Number(s):
8,961,776
Application Number:
13/499,886
Assignee:
The Regents of the University of California (Oakland, CA)
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Patent
Resource Relation:
Patent File Date: 2010 Sep 10
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Long, Jeffrey R, Chang, Christopher J, and Karunadasa, Hemamala I. Molecular metal-Oxo catalysts for generating hydrogen from water. United States: N. p., 2015. Web.
Long, Jeffrey R, Chang, Christopher J, & Karunadasa, Hemamala I. Molecular metal-Oxo catalysts for generating hydrogen from water. United States.
Long, Jeffrey R, Chang, Christopher J, and Karunadasa, Hemamala I. Tue . "Molecular metal-Oxo catalysts for generating hydrogen from water". United States. https://www.osti.gov/servlets/purl/1171094.
@article{osti_1171094,
title = {Molecular metal-Oxo catalysts for generating hydrogen from water},
author = {Long, Jeffrey R and Chang, Christopher J and Karunadasa, Hemamala I},
abstractNote = {A composition of matter suitable for the generation of hydrogen from water is described, the positively charged cation of the composition having the general formula [(PY5W.sub.2)MO].sup.2+, wherein PY5W.sub.2 is (NC.sub.5XYZ)(NC.sub.5H.sub.4).sub.4C.sub.2W.sub.2, M is a transition metal, and W, X, Y, and Z can be H, R, a halide, CF.sub.3, or SiR.sub.3, where R can be an alkyl or aryl group. The two accompanying counter anions, in one embodiment, can be selected from the following Cl.sup.-, I.sup.-, PF.sub.6.sup.-, and CF.sub.3SO.sub.3.sup.-. In embodiments of the invention, water, such as tap water containing electrolyte or straight sea water can be subject to an electric potential of between 1.0 V and 1.4 V relative to the standard hydrogen electrode, which at pH 7 corresponds to an overpotential of 0.6 to 1.0 V, with the result being, among other things, the generation of hydrogen with an optimal turnover frequency of ca. 1.5 million mol H.sub.2/mol catalyst per h.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {2}
}

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Works referenced in this record:

Synthesis and Characterization of New d0 Tungsten and Molybdenum Imido Complexes with Heteroatomic Bifunctional O-N Chelate Ligands
journal, June 1994

  • Takacs, Janos; Cavell, Ronald G.
  • Inorganic Chemistry, Vol. 33, Issue 12
  • DOI: 10.1021/ic00090a026