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Untangling Thermal and Nonthermal Effects in Plasmonic Photocatalysis

Li, Xueqian and Liu, Jie and Everitt, Henry O. (2021) Untangling Thermal and Nonthermal Effects in Plasmonic Photocatalysis. In: Plasmonic Catalysis: From Fundamentals to Applications. Wiley , Weinheim, pp. 191-230. ISBN 9783527347506.

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This chapter introduces a methodology to distinguish the thermal and nonthermal contributions in an illuminated, plasmon-enhanced catalyst. Although nonthermal effects in light-driven reactions are deservedly drawing much attention, photothermal effects may prove to be even more beneficial because of the way illumination can tailor thermal profiles within a catalyst. The technique presented here extracts the effective thermal and nonthermal reaction rates under illumination by simultaneously measuring the total reaction rate and the top- and bottom-surface temperatures of the catalyst bed. Using these measured temperatures, a simplified model of the catalyst thermal profile and effective thermal reaction rates may be deduced for the illuminated catalysts. Ruthenium and rhodium photocatalysts with intrinsic plasmonic and catalytic properties for NH3 synthesis and CO2 hydrogenation were respectively used to illustrate this technique and examine thermal, photothermal, and nonthermal reaction rates. Through innovative experimental techniques, the thermal and nonthermal contributions may be systematically evaluated to understand underlying synergistic mechanisms in plasmonic photocatalysis and extract the nonthermal contribution from the total measured reaction rate.

Item Type:Book Section
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Li, Xueqian0000-0002-1197-3743
Additional Information:© 2021 Wiley-VCH GmbH. Published Online: 11 June 2021.
Subject Keywords:Photothermal effect; plasmonic photocatalysis; thermal gradient; nonthermal effect; hot carriers
Record Number:CaltechAUTHORS:20210622-165124100
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Official Citation:Camargo, P.H., Cortés, E., Li, X., Liu, J. and Everitt, H.O. (2021). Untangling Thermal and Nonthermal Effects in Plasmonic Photocatalysis. In Plasmonic Catalysis (eds P.H. Camargo and E. Cortés).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109528
Deposited By: Tony Diaz
Deposited On:23 Jun 2021 19:26
Last Modified:24 Jun 2021 20:28

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