Abstract

Methods, processes and compositions are provided for a visual or chemochromic hydrogen-detector with variable or tunable reversible color change. The working temperature range for the hydrogen detector is from minus 100°C to plus 500°C. A hydrogen-sensitive pigment, including, but not limited to, oxides, hydroxides and polyoxo-compounds of tungsten. molybdenum, vanadium, chromium and combinations thereof, is combined with nano-sized metal activator particles and preferably, coated on a porous or woven substrate. In the presence of hydrogen, the composition rapidly changes its color from white or light-gray or light-tan to dark gray, navy-blue or black depending on the exposure time and hydrogen concentration in the medium. After hydrogen exposure ceases, the original color of the hydrogen-sensitive pigment is restored, and the visual hydrogen detector can be used repeatedly. By changing the composition of the hydrogen-sensitive pigment, the time required for its complete regeneration

Document Type

Patent

Patent Number

US 8,003,055

Application Serial Number

12/038,210

Issue Date

8-23-2011

Current Assignee

UCFRF

Assignee at Issuance

UCFRF

College

Florida Solar Energy Center (FSEC)

Department

FSEC

Allowance Date

4-15-2011

Filing Date

2-27-2008

Assignee at Filing

UCFRF

Filing Type

Nonprovisional Application Record

Donated

no

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