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Confirming nonthermal plasmonic effects enhance CO2 methanation on Rh/TiO2 catalysts

Publication ,  Journal Article
Li, X; Everitt, HO; Liu, J
Published in: Nano Research
August 1, 2019

In some cases, illumination of traditional thermal catalysts and tailored plasmonic photocatalysts may synergistically combine thermal and nonthermal mechanisms to enhance reaction rates and improve product selectivity at reduced temperatures. To understand how these attributes are achieved in plasmon-driven catalysis, these intertwined thermal and nonthermal effects must be untangled. Here, we show how a novel indirect illumination technique, in conjunction with precisely monitored thermal profiles of the catalyst, can confirm and clarify the role of nonthermal effects in plasmon-enhanced carbon dioxide methanation on a Rh/TiO2 photocatalyst. We find that the extracted nonthermal methane production rate has a linear dependence on the top surface temperature, distinctly different from an exponential dependence for thermal catalysis. We also find that the apparent quantum efficiency from the nonthermal contribution has no dependence on light intensity but maintains a linear dependence on top surface temperatures between 200 and 350 °C. The clear exposition of nonthermal effects in the Rh/TiO2 plasmonic photocatalyst illustrates how this methodology may be applied for the quantitative evaluation of thermal and nonthermal light effects in other plasmon-enhanced catalytic reactions.[Figure not available: see fulltext.].

Duke Scholars

Published In

Nano Research

DOI

EISSN

1998-0000

ISSN

1998-0124

Publication Date

August 1, 2019

Volume

12

Issue

8

Start / End Page

1906 / 1911

Related Subject Headings

  • Nanoscience & Nanotechnology
 

Citation

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MLA
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Li, X., Everitt, H. O., & Liu, J. (2019). Confirming nonthermal plasmonic effects enhance CO2 methanation on Rh/TiO2 catalysts. Nano Research, 12(8), 1906–1911. https://doi.org/10.1007/s12274-019-2457-x
Li, X., H. O. Everitt, and J. Liu. “Confirming nonthermal plasmonic effects enhance CO2 methanation on Rh/TiO2 catalysts.” Nano Research 12, no. 8 (August 1, 2019): 1906–11. https://doi.org/10.1007/s12274-019-2457-x.
Li X, Everitt HO, Liu J. Confirming nonthermal plasmonic effects enhance CO2 methanation on Rh/TiO2 catalysts. Nano Research. 2019 Aug 1;12(8):1906–11.
Li, X., et al. “Confirming nonthermal plasmonic effects enhance CO2 methanation on Rh/TiO2 catalysts.” Nano Research, vol. 12, no. 8, Aug. 2019, pp. 1906–11. Scopus, doi:10.1007/s12274-019-2457-x.
Li X, Everitt HO, Liu J. Confirming nonthermal plasmonic effects enhance CO2 methanation on Rh/TiO2 catalysts. Nano Research. 2019 Aug 1;12(8):1906–1911.
Journal cover image

Published In

Nano Research

DOI

EISSN

1998-0000

ISSN

1998-0124

Publication Date

August 1, 2019

Volume

12

Issue

8

Start / End Page

1906 / 1911

Related Subject Headings

  • Nanoscience & Nanotechnology