Photocatalytic H2 evolution from NADH with carbon quantum dots/Pt and 2-phenyl-4-(1-naphthyl)quinolinium ion

Wenting Wu, Liying Zhan, Kei Ohkubo, Yusuke Yamada, Mingbo Wu, Shunichi Fukuzumi

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Carbon quantum dots (CQDs) were simply blended with platinum salts (K2PtCl4 and K2PtCl6) and converted into a hydrogen-evolution co-catalyst in situ, wherein Pt salts were dispersed on the surface of CQDs under photoirradiation of an aqueous solution of NADH (an electron and proton source) and 2-phenyl-4-(1-naphthyl)quinolinium ion (QuPh+-NA) employed as an organic photocatalyst. The co-catalyst (CQDs/Pt) exhibits similar catalytic reactivity in H2 evolution as that of pure Pt nanoparticles (PtNPs) although the Pt amount of CQDs/Pt was only 1/200 that of PtNPs previously reported. CQDs were able to capture the Pt salt acting as Pt supports. Meanwhile, CQDs act as electron reservoir, playing an important role to enhance electron transfer from QuPh+-NA to the Pt salt, which was confirmed by kinetic studies, XPS and HRTEM.

Original languageEnglish
Pages (from-to)63-70
Number of pages8
JournalJournal of Photochemistry and Photobiology B: Biology
Volume152
DOIs
StatePublished - 1 Nov 2015

Bibliographical note

Funding Information:
We thank the Grants-in-Aid (Nos. 26620154 and 26288037 to K.O. and Nos. 24350069 and 25600025 to Y.Y.) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and an ALCA project from JST, Japan (to S.F.), NSFC ( 21302224 , 51172285 ), State Key Laboratory of Fine Chemicals ( KF1203 ), China Postdoctoral Science Foundation ( 2014M560590 ), Technology Program for Basic Research of Qingdao ( 14-2-4-47-jch ), the Fundamental Research Funds for the Central Universities ( 13CX02066A , 14CX02060A ) and Shandong Provincial Natural Science Foundation ( ZR2013BQ028 ) for financial support.

Publisher Copyright:
© 2014 Elsevier B.V.

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