Full-spectrum nonmetallic plasmonic carriers for efficient isopropanol dehydration

Changhai Lu, Daotong You, Juan Li, Long Wen, Baojun Li, Tuan Guo () and Zaizhu Lou ()
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Changhai Lu: Jinan University
Daotong You: Jinan University
Juan Li: Jinan University
Long Wen: Jinan University
Baojun Li: Jinan University
Tuan Guo: Jinan University
Zaizhu Lou: Jinan University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Plasmonic hot carriers have the advantage of focusing, amplifying, and manipulating optical signals via electron oscillations which offers a feasible pathway to influence catalytic reactions. However, the contribution of nonmetallic hot carriers and thermal effects on the overall reactions are still unclear, and developing methods to enhance the efficiency of the catalysis is critical. Herein, we proposed a new strategy for flexibly modulating the hot electrons using a nonmetallic plasmonic heterostructure (named W18O49-nanowires/reduced-graphene-oxides) for isopropanol dehydration where the reaction rate was 180-fold greater than the corresponding thermocatalytic pathway. The key detail to this strategy lies in the synergetic utilization of ultraviolet light and visible-near-infrared light to enhance the hot electron generation and promote electron transfer for C-O bond cleavage during isopropanol dehydration reaction. This, in turn, results in a reduced reaction activation barrier down to 0.37 eV (compared to 1.0 eV of thermocatalysis) and a significantly improved conversion efficiency of 100% propylene from isopropanol. This work provides an additional strategy to modulate hot carrier of plasmonic semiconductors and helps guide the design of better catalytic materials and chemistries.

Date: 2022
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DOI: 10.1038/s41467-022-34738-z

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