A ruthenium-based plasmonic hybrid photocatalyst for aqueous carbon dioxide conversion with a high reaction rate and selectivity. Issue 29 (11th July 2019)

• Record Type: Journal Article
• Authors: Jun, Hwiseok; Choi, Shinyoung; Yang, Moon Young; Nam, Yoon Sung
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 29(2019)
• Page Start: 17254
• Page End: 17260
• Publication Date: 2019-07-11
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta05880j
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A cis -ruthenium complex fixed on a plasmonic Au/TiO2 nanostructure efficiently converts CO2 into formic acid even in low pH water. Abstract : Photocatalytic CO2 conversion has been paid great attention in an effort to produce renewable hydrocarbon fuels in a sustainable manner using solar energy. However, new catalytic materials still need to be developed to improve the conversion efficiency, selectivity, and stability for practical applications. Here we report a ruthenium-based asymmetric catalyst immobilized onto a plasmonic Au/TiO2 heterostructure to efficiently and selectively convert CO2 into formic acid in an aqueous solution. The plasmonic heterostructure promotes multi-electron transfer towards the catalyst through efficient charge separation at a Schottky junction. The ruthenium complex is stably immobilized onto the heterostructure by two phosphonate groups, and the catalytic centre is stabilized by bidentate π-backbonding. The photocatalytic structure exhibits a high turnover frequency of 1200 h −1 at 360 mW cm −2, a superior selectivity towards formic acid (∼95%) even at a low pH (∼pH 3), and a remarkable reusability over 50 hours without loss of the catalytic activity.