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Titolo:
GOLD-PLATINUM BIMETALLIC CLUSTER CATALYSTS FOR VISIBLE LIGHT-INDUCED HYDROGEN-PRODUCTION FROM WATER
Autore:
TOSHIMA N; YONEZAWA T;
Indirizzi:
UNIV TOKYO,FAC ENGN,DEPT IND CHEM,BUNKYO KU TOKYO 113 JAPAN
Titolo Testata:
Proceedings of the Indian Academy of Sciences. Chemical sciences
fascicolo: 6, volume: 105, anno: 1993,
pagine: 343 - 352
SICI:
0253-4134(1993)105:6<343:GBCCFV>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDUCED HYDROGEN EVOLUTION; STRUCTURAL-ANALYSIS;
Keywords:
BIMETALLIC CLUSTER; PLATINUM; HYDROGEN PRODUCTION; CATALYSTS; SOLAR ENERGY STORAGE; ELECTRON TRANSFER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
N. Toshima e T. Yonezawa, "GOLD-PLATINUM BIMETALLIC CLUSTER CATALYSTS FOR VISIBLE LIGHT-INDUCED HYDROGEN-PRODUCTION FROM WATER", Proceedings of the Indian Academy of Sciences. Chemical sciences, 105(6), 1993, pp. 343-352

Abstract

Simultaneous reduction of two kinds of noble metal ions by refluxing in alcohol in the presence of poly(N-vinyl-2-pyrrolidone) can generally give polymer-protected bimetallic dusters with a core structure. Thestructures of the clusters were determined by the EXAFS measurements. On the other hand, it is known that micelle-protected platinum clusters work as good catalysts for visible light-induced hydrogen production from water in a system of EDTA/Ru(bpy)3(2+)/methyl viologen. The stable dispersions of polymer- and micelle-protected gold/platinum bimetallic clusters were prepared by alcohol- and photoreduction, respectively. The dispersions prepared by photoreduction in the presence of micelle are mainly composed of the mixtures of monometallic gold and platinum clusters, which cannot work as more active catalysts than monometallic platinum clusters. In contrast, the dispersions prepared by alcohol-reduction in the presence of polymer are composed of Au/Pt bimetallic clusters with a ''Pt-surrounded Au-core'' structure, which are moreactive catalysts than the monometallic Pt clusters as catalysts for the hydrogen production.

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Documento generato il 01/10/20 alle ore 01:15:11