Titanium hydride—a stable support for Pt catalysts in oxygen reduction reaction

Olga Krichevski; Hanan Teller; Palaniappan Subramanian; Srikanth Kolagatla; Alex Schechter

doi:10.1007/s10008-018-3916-0

Titanium hydride—a stable support for Pt catalysts in oxygen reduction reaction

Olga Krichevski, Hanan Teller, Palaniappan Subramanian, Srikanth Kolagatla, Alex Schechter

Department of Chemical Sciences

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A new class of conductive and dimensionally stable surface-modified TiH₂ particles prepared by ultra-sonication method is proposed as a non-carbon support for Pt catalysts. Thermal analysis results indicated good thermal stability of these materials at high temperatures in oxygen atmosphere. TiH₂ particles are discovered to be stable at potentials higher than 1.5 V in O₂-saturated H₂SO₄ solution. It is also found that the surface-modified TiH₂ exhibits a modest electrocatalytic activity toward oxygen reduction reaction. Accelerated durability measurements show that Pt catalysts supported on sonicated TiH₂ exhibited superior stability than standard Vulcan XC-72 carbon. High corrosion resistance and thermal stability render better chemical stability and structural integrity to surface-modified TiH₂ particles at elevated temperatures.

Original language	English
Pages (from-to)	2049-2058
Number of pages	10
Journal	Journal of Solid State Electrochemistry
Volume	22
Issue number	7
DOIs	https://doi.org/10.1007/s10008-018-3916-0
State	Published - 1 Jul 2018

Keywords

Durability
Fuel cell
Non-carbon support
Oxygen reduction reaction
TiH

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10.1007/s10008-018-3916-0

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abstract = "A new class of conductive and dimensionally stable surface-modified TiH2 particles prepared by ultra-sonication method is proposed as a non-carbon support for Pt catalysts. Thermal analysis results indicated good thermal stability of these materials at high temperatures in oxygen atmosphere. TiH2 particles are discovered to be stable at potentials higher than 1.5 V in O2-saturated H2SO4 solution. It is also found that the surface-modified TiH2 exhibits a modest electrocatalytic activity toward oxygen reduction reaction. Accelerated durability measurements show that Pt catalysts supported on sonicated TiH2 exhibited superior stability than standard Vulcan XC-72 carbon. High corrosion resistance and thermal stability render better chemical stability and structural integrity to surface-modified TiH2 particles at elevated temperatures.",

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author = "Olga Krichevski and Hanan Teller and Palaniappan Subramanian and Srikanth Kolagatla and Alex Schechter",

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AU - Krichevski, Olga

AU - Teller, Hanan

AU - Subramanian, Palaniappan

AU - Kolagatla, Srikanth

AU - Schechter, Alex

PY - 2018/7/1

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AB - A new class of conductive and dimensionally stable surface-modified TiH2 particles prepared by ultra-sonication method is proposed as a non-carbon support for Pt catalysts. Thermal analysis results indicated good thermal stability of these materials at high temperatures in oxygen atmosphere. TiH2 particles are discovered to be stable at potentials higher than 1.5 V in O2-saturated H2SO4 solution. It is also found that the surface-modified TiH2 exhibits a modest electrocatalytic activity toward oxygen reduction reaction. Accelerated durability measurements show that Pt catalysts supported on sonicated TiH2 exhibited superior stability than standard Vulcan XC-72 carbon. High corrosion resistance and thermal stability render better chemical stability and structural integrity to surface-modified TiH2 particles at elevated temperatures.

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KW - Fuel cell

KW - Non-carbon support

KW - Oxygen reduction reaction

KW - TiH

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Titanium hydride—a stable support for Pt catalysts in oxygen reduction reaction

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