Organometallic Iridium(III) Complex Sensitized Ternary Hybrid Photocatalyst for CO 2 to CO Conversion

Organometallic Iridium(III) Complex Sensitized Ternary Hybrid Photocatalyst for CO 2 to CO Conversion

A series of heteroleptic iridium(III) complexes functionalized with two phosphonic acid (-PO H ) groups ( IrP, IrP, IrP, and IrP) were prepared and anchored onto rhenium(I) catalyst (ReP)-loaded TiO particles (TiO /ReP) to build up a new IrP-sensitized TiO photocatalyst system (IrP/TiO /ReP). The ph...

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Veröffentlicht in:Chemistry : a European journal 2019-10, Vol.25 (59), p.13609-13623
Hauptverfasser: Kim, Pil Soo, Choi, Sunghan, Kim, So-Yoen, Jo, Ju Hyoung, Lee, Yoon Seo, Kim, Bupmo, Kim, Wooyul, Choi, Wonyong, Kim, Chul Hoon, Son, Ho-Jin, Pac, Chyongjin, Kang, Sang Ook
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container_end_page 13623
container_issue 59
container_start_page 13609
container_title Chemistry : a European journal
container_volume 25
creator Kim, Pil Soo
Choi, Sunghan
Kim, So-Yoen
Jo, Ju Hyoung
Lee, Yoon Seo
Kim, Bupmo
Kim, Wooyul
Choi, Wonyong
Kim, Chul Hoon
Son, Ho-Jin
Pac, Chyongjin
Kang, Sang Ook
description A series of heteroleptic iridium(III) complexes functionalized with two phosphonic acid (-PO H ) groups ( IrP, IrP, IrP, and IrP) were prepared and anchored onto rhenium(I) catalyst (ReP)-loaded TiO particles (TiO /ReP) to build up a new IrP-sensitized TiO photocatalyst system (IrP/TiO /ReP). The photosensitizing behavior of the IrP series was examined within the IrP/TiO /ReP platform for the photocatalytic conversion of CO into CO. The four IrP-based ternary hybrids showed increased conversion activity and durability than that of the corresponding homo- (IrP+ReP) and heterogeneous (IrP+TiO /ReP) mixed systems. Among the four IrP/TiO /ReP photocatalysts, the low-energy-light (>500 nm) activated IrP immobilized ternary system ( IrP/TiO /ReP) exhibited the most durable conversion activity, giving a turnover number of ≥730 for 170 h. A similar kinetic feature observed through time-resolved photoluminescence measurements of both IrP/TiO and TiO -free IrP films suggests that the net electron flow in the ternary hybrid proceeds dominantly through a reductive quenching mechanism, unlike the oxidative quenching route of typical dye/TiO -based photolysis.
doi_str_mv 10.1002/chem.201903136
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The photosensitizing behavior of the IrP series was examined within the IrP/TiO /ReP platform for the photocatalytic conversion of CO into CO. The four IrP-based ternary hybrids showed increased conversion activity and durability than that of the corresponding homo- (IrP+ReP) and heterogeneous (IrP+TiO /ReP) mixed systems. Among the four IrP/TiO /ReP photocatalysts, the low-energy-light (&gt;500 nm) activated IrP immobilized ternary system ( IrP/TiO /ReP) exhibited the most durable conversion activity, giving a turnover number of ≥730 for 170 h. A similar kinetic feature observed through time-resolved photoluminescence measurements of both IrP/TiO and TiO -free IrP films suggests that the net electron flow in the ternary hybrid proceeds dominantly through a reductive quenching mechanism, unlike the oxidative quenching route of typical dye/TiO -based photolysis.</description><identifier>ISSN: 0947-6539</identifier><identifier>EISSN: 1521-3765</identifier><identifier>DOI: 10.1002/chem.201903136</identifier><identifier>PMID: 31408218</identifier><language>eng</language><publisher>Germany</publisher><ispartof>Chemistry : a European journal, 2019-10, Vol.25 (59), p.13609-13623</ispartof><rights>2019 Wiley-VCH Verlag GmbH &amp; Co. 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A similar kinetic feature observed through time-resolved photoluminescence measurements of both IrP/TiO and TiO -free IrP films suggests that the net electron flow in the ternary hybrid proceeds dominantly through a reductive quenching mechanism, unlike the oxidative quenching route of typical dye/TiO -based photolysis.</abstract><cop>Germany</cop><pmid>31408218</pmid><doi>10.1002/chem.201903136</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0002-3911-7818</orcidid><orcidid>https://orcid.org/0000-0003-2069-1235</orcidid></addata></record>
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title Organometallic Iridium(III) Complex Sensitized Ternary Hybrid Photocatalyst for CO 2 to CO Conversion
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