Amorphous Metal-Hydrides for Optical Hydrogen Sensing

The Effect of Adding Glassy Ni–Zr to Mg–Ni–H

Journal article (2016)

Authors

M. Victoria Garcia ChemE/Materials for Energy Conversion and Storage - AS
R.J. Westerwaal ChemE/Materials for Energy Conversion and Storage - AS
B. Dam ChemE/Materials for Energy Conversion and Storage - AS
JLM van Mechelen ABB Corporate Research
Research Group
ChemE/Materials for Energy Conversion and Storage (AS) (TU Delft)
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Published Date

11-01-2016

Language

English

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Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Materials for Energy Conversion and Storage

Abstract

Optical hydrogen sensors have a promising future in a society where hydrogen detection becomes increasingly essential. Sophisticated designs have been reported, which traditionally use Pd as sensing material. Upon hydrogenation, Pd remains metallic and is characterized by a small optical contrast and low sensitivity. Here we report on a new generation hydrogen sensing materials, with a large optical contrast and high sensitivity in a broad hydrogen pressure sensing range. We show that the sensitivity of transparent hydrides is strongly increased by changing the intrinsic mechanism of hydrogenation. Using the robust behavior of the metallic glass Ni–Zr upon hydrogenation, we made amorphous Mg–Ni–Zr where the interplay of transparent Mg2NiH4 and glassy Ni–Zr provides unprecedented advantages. We demonstrate practical usage of the novel hydride Mg–Ni–Zr in gas and liquid environments corresponding to realistic applications.