Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shunichi Fukuzumi | * |
dc.date.accessioned | 2016-08-28T12:08:22Z | - |
dc.date.available | 2016-08-28T12:08:22Z | - |
dc.date.issued | 2011 | * |
dc.identifier.issn | 0947-6539 | * |
dc.identifier.other | OAK-7395 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/221466 | - |
dc.description.abstract | The catalytic activity of Pt nanoparticles (PtNPs) with different sizes and shapes was investigated in a photocatalytic hydrogen-evolution system composed of the 9-mesityl-10-methylacridinium ion (Acr +-Mes: photocatalyst) and dihydronicotinamide adenine dinucleotide (NADH: electron donor), based on rates of hydrogen evolution and electron transfer from one-electron-reduced species of Acr +-Mes (Acr .-Mes) to PtNPs. Cubic PtNPs with a diameter of (6.3±0.6)nm exhibited the maximum catalytic activity. The observed hydrogen-evolution rate was virtually the same as the rate of electron transfer from Acr .-Mes to PtNPs. The rate constant of electron transfer (k et) increased linearly with increasing proton concentration. When H + was replaced by D +, the inverse kinetic isotope effect was observed for the electron-transfer rate constant (k et(H)/k et(D)=0.47). The linear dependence of k et on proton concentration together with the observed inverse kinetic isotope effect suggests that proton-coupled electron transfer from Acr .-Mes to PtNPs to form the PtH bond is the rate-determining step for catalytic hydrogen evolution. When FeNPs were used instead of PtNPs, hydrogen evolution was also observed, although the hydrogen-evolution efficiency was significantly lower than that of PtNPs because of the much slower electron transfer from Acr .-Mes to FeNPs. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | * |
dc.language | English | * |
dc.title | Size-and shape-dependent activity of metal nanoparticles as hydrogen-evolution catalysts: Mechanistic insights into photocatalytic hydrogen evolution | * |
dc.type | Article | * |
dc.relation.issue | 9 | * |
dc.relation.volume | 17 | * |
dc.relation.index | SCI | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 2777 | * |
dc.relation.lastpage | 2785 | * |
dc.relation.journaltitle | Chemistry - A European Journal | * |
dc.identifier.doi | 10.1002/chem.201002399 | * |
dc.identifier.wosid | WOS:000288097600031 | * |
dc.identifier.scopusid | 2-s2.0-79951781270 | * |
dc.author.google | Kotani H. | * |
dc.author.google | Hanazaki R. | * |
dc.author.google | Ohkubo K. | * |
dc.author.google | Yamada Y. | * |
dc.author.google | Fukuzumi S. | * |
dc.contributor.scopusid | Shunichi Fukuzumi(35430038100;58409757400) | * |
dc.date.modifydate | 20240401081001 | * |