Size-dependent H2 sensing over supported Pt nanoparticles

Catalyst size affects the overall kinetics and mechanism of almost all heterogeneous chemical reactions. Since the functional sensing materials in resistive chemical sensors are practically the very same nanomaterials as the catalysts in heterogeneous chemistry, a plausible question arises: Is there...

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Bibliographic Details
Main Authors: Mohl Melinda
Dombovari Áron
Szabó Mária
Järvinen Topias
Pitkanen Olli
Sápi András
Juhász Koppány Levente
Kéri Albert
Galbács Gábor
Kukovecz Ákos
Kónya Zoltán
Kordás Krisztián
Format: Article
Published: 2019
Series:JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 19 No. 1
doi:10.1166/jnn.2019.15787

mtmt:3428263
Online Access:http://publicatio.bibl.u-szeged.hu/14964
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490 0 |a JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY  |v 19 No. 1 
520 3 |a Catalyst size affects the overall kinetics and mechanism of almost all heterogeneous chemical reactions. Since the functional sensing materials in resistive chemical sensors are practically the very same nanomaterials as the catalysts in heterogeneous chemistry, a plausible question arises: Is there any effect of the catalyst size on the sensor properties? Our study attempts to give an insight into the problem by analyzing the response and sensitivity of resistive H-2 sensors based on WO3 nanowire supported Pt nanoparticles having size of 1.5 +/- 0.4 nm, 6.2 +/- 0.8 nm, 3.7 +/- 0.5 nm and 8.3 +/- 1.3 nm. The results show that Pt nanoparticles of larger size are more active in H-2 sensing than their smaller counterparts and indicate that the detection mechanism is more complex than just considering the number of surface atoms of the catalyst. 
700 0 1 |a Dombovari Áron  |e aut 
700 0 1 |a Szabó Mária  |e aut 
700 0 1 |a Järvinen Topias  |e aut 
700 0 1 |a Pitkanen Olli  |e aut 
700 0 1 |a Sápi András  |e aut 
700 0 1 |a Juhász Koppány Levente  |e aut 
700 0 1 |a Kéri Albert  |e aut 
700 0 1 |a Galbács Gábor  |e aut 
700 0 1 |a Kukovecz Ákos  |e aut 
700 0 1 |a Kónya Zoltán  |e aut 
700 0 1 |a Kordás Krisztián  |e aut 
856 4 0 |u http://publicatio.bibl.u-szeged.hu/14964/1/jnnn_mohl.pdf  |z Dokumentum-elérés