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Titolo:
Activity analysis of trans-[RuCl2(NH3)(4)](+) incorporated into Nafion membrane for water oxidation catalyst
Autore:
Shiroishi, H; Yamashita, S; Kaneko, M;
Indirizzi:
Ibaraki Univ, Fac Sci, Mito, Ibaraki 3108512, Japan Ibaraki Univ Mito Ibaraki Japan 3108512 Sci, Mito, Ibaraki 3108512, Japan
Titolo Testata:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
fascicolo: 1-2, volume: 169, anno: 2001,
pagine: 269 - 273
SICI:
1381-1169(20010328)169:1-2<269:AAOTII>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRITICAL DECOMPOSITION DISTANCES; COOPERATIVE CATALYSIS; POLYMER MEMBRANE; COMPLEX;
Keywords:
water oxidation; artificial photosynthesis; Nafion; trans-[RuCl2(NH3)(4)](+); dioxygen evolution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Kaneko, M Ibaraki Univ, Fac Sci, Mito, Ibaraki 3108512, Japan Ibaraki Univ Mito Ibaraki Japan 3108512 Ibaraki 3108512, Japan
Citazione:
H. Shiroishi et al., "Activity analysis of trans-[RuCl2(NH3)(4)](+) incorporated into Nafion membrane for water oxidation catalyst", J MOL CAT A, 169(1-2), 2001, pp. 269-273

Abstract

Activity of trans-tetraamminedichlororuthenium(III) complex as water oxidation catalyst was studied both in a homogeneous aqueous solution (AS) and in a heterogeneous Nafion membrane (HM) using Ce(TV) oxidant. This trans-[RuCl2(NH3)(4)](+) was more active than any other mononuclear ammine rutheniumcomplex studied before. In the AS, the rate of evolved dioxygen is second order with respect to the complex concentration, indicating that the complexes oxidize water molecules bimolecularly in low concentration regions. In high concentration regions, the activity of water oxidation decreased with the increase of the concentration, and at the same time dinitrogen (N-2) evolved by a bimolecular decomposition process. In the HIM, the activity of the complex was remarkably high, and it was maintained for a long time at low concentrations (<0.02 mol dm(-3)). At middle concentrations for the HM (0.02-0.05 mol dm(-3)), the activity of the complex decreased with increasingconcentration because of bimolecular decomposition. However, in high concentration regions the complex recovered the activity most probably due to polymerization of the complex. The activity in the HM was analyzed in terms of the cooperative catalysis, the bimolecular decomposition and the polymerization of the complex based on intermolecular distance distribution. <(c)> 2001 Elsevier Science B.V, All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 12:29:25