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Type: Journal article
Title: Single atom (Pd/Pt) supported on graphitic carbon nitride as an efficient photocatalyst for visible-light reduction of carbon dioxide
Author: Gao, G.
Jiao, Y.
Waclawik, E.
Du, A.
Citation: Journal of the American Chemical Society, 2016; 138(19):6292-6297
Publisher: American Chemical Society
Issue Date: 2016
ISSN: 0002-7863
Statement of
Guoping Gao, Yan Jiao, Eric R. Waclawik, and Aijun Du
Abstract: Reducing carbon dioxide to hydrocarbon fuel with solar energy is significant for high-density solar energy storage and carbon balance. In this work, single atoms of palladium and platinum supported on graphitic carbon nitride (g-C3N4), i.e., Pd/g-C3N4 and Pt/g-C3N4, respectively, acting as photocatalysts for CO2 reduction were investigated by density functional theory calculations for the first time. During CO2 reduction, the individual metal atoms function as the active sites, while g-C3N4 provides the source of hydrogen (H*) from the hydrogen evolution reaction. The complete, as-designed photocatalysts exhibit excellent activity in CO2 reduction. HCOOH is the preferred product of CO2 reduction on the Pd/g-C3N4 catalyst with a rate-determining barrier of 0.66 eV, while the Pt/g-C3N4 catalyst prefers to reduce CO2 to CH4 with a rate-determining barrier of 1.16 eV. In addition, deposition of atom catalysts on g-C3N4 significantly enhances the visible-light absorption, rendering them ideal for visible-light reduction of CO2. Our findings open a new avenue of CO2 reduction for renewable energy supply.
Rights: © 2016 American Chemical Society
DOI: 10.1021/jacs.6b02692
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Chemical Engineering publications

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