relation: http://publicatio.bibl.u-szeged.hu/14964/
title: Size-dependent H2 sensing over supported Pt nanoparticles
creator:  Mohl Melinda
creator:  Dombovari Áron
creator:  Szabó Mária
creator:  Järvinen Topias
creator:  Pitkanen Olli
creator:  Sápi András
creator:  Juhász Koppány Levente
creator:  Kéri Albert
creator:  Galbács Gábor
creator:  Kukovecz Ákos
creator:  Kónya Zoltán
creator:  Kordás Krisztián
description: 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.
date: 2019
type: Folyóiratcikk
type: PeerReviewed
format: text
identifier: http://publicatio.bibl.u-szeged.hu/14964/1/jnnn_mohl.pdf
identifier:     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: Size-dependent H2 sensing over supported Pt nanoparticles.   JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 19 (1).  pp. 459-464.  ISSN 1533-4880 (2019)     
identifier: doi:10.1166/jnn.2019.15787
relation: 3428263
language: eng