A reliable measurement of the sample temperature during photothermal catalysis experiments is of paramount importance in disentangling the thermal and non-thermal contributions to the overall process. Moreover, even small errors in the temperature value may lead to substantial mistakes in estimating the reaction rate due to the exponential dependence of the Arrhenius law. In this work, after general setup considerations, we discuss the challenges in reliably measuring the temperature of photocatalysts considering the case of thin-filmtitaniumnitride (TiN), anemergingplasmonic metal, and of titanium dioxide (TiO2), a benchmark semiconductor, under gas phase conditions. By evaluating the effects of the gas flux, gas composition, and choice of instrumentation, we show how all these parameters can significantly affect the values of the measured temperatures. This analysis highlights the critical points that researchers ought to consider when performing photothermal catalysis studies.

Challenges in temperature measurements in gas-phase photothermal catalysis

Montini, Tiziano;Fornasiero, Paolo
Conceptualization
2022-01-01

Abstract

A reliable measurement of the sample temperature during photothermal catalysis experiments is of paramount importance in disentangling the thermal and non-thermal contributions to the overall process. Moreover, even small errors in the temperature value may lead to substantial mistakes in estimating the reaction rate due to the exponential dependence of the Arrhenius law. In this work, after general setup considerations, we discuss the challenges in reliably measuring the temperature of photocatalysts considering the case of thin-filmtitaniumnitride (TiN), anemergingplasmonic metal, and of titanium dioxide (TiO2), a benchmark semiconductor, under gas phase conditions. By evaluating the effects of the gas flux, gas composition, and choice of instrumentation, we show how all these parameters can significantly affect the values of the measured temperatures. This analysis highlights the critical points that researchers ought to consider when performing photothermal catalysis studies.
2022
26-lug-2022
Pubblicato
File in questo prodotto:
File Dimensione Formato  
joule2022.pdf

Accesso chiuso

Descrizione: manuscript
Tipologia: Documento in Pre-print
Licenza: Copyright Editore
Dimensione 1.35 MB
Formato Adobe PDF
1.35 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
joule2022-Post_print.pdf

Open Access dal 18/08/2023

Tipologia: Bozza finale post-referaggio (post-print)
Licenza: Creative commons
Dimensione 1.88 MB
Formato Adobe PDF
1.88 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/3034338
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 23
social impact