Evidence for a charge transfer from spilt-over hydrogen to platinum by means of ESR spectroscopy

被引：11

作者：

Gutsze, A ^{[1
]}

Roland, U

Karge, HG

机构：

[1] Ludwig Rydygier Univ, Sch Med Sci, Dept Biophys, PL-85067 Bydgoszcz, Poland

[2] UFZ Helmholtz Ctr Environm Res, Sekt Sanierungsforsch, D-04318 Leipzig, Germany

[3] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

SPILLOVER AND MIGRATION OF SURFACE SPECIES ON CATALYSTS | 1997年 / 112卷

关键词：

D O I：

10.1016/S0167-2991(97)80864-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An electron transfer from spilt-over hydrogen (H*) to platinum on a Pt/gamma-Al2O3 catalyst has been investigated by ESR spectroscopy. Activated hydrogen is formed on Pt clusters and the resulting atomic H* species migrate onto the alumina surface where they can interact with single Pt atoms. The chemisorption of H* at 77 K leads to the appearance of ESR signals which are related to the formation of Pt-n(-) and Pt- species. This charge transfer is correlated to the formation of H+ ions from initially present radical hydrogen spillover species.

引用

页码：417 / 424

页数：8

共 25 条

[1] EPR INVESTIGATION OF PT- IN SILICON [J].

ANDERSON, FG ;

MILLIGAN, RF ;

WATKINS, GD .

PHYSICAL REVIEW B, 1992, 45 (07) :3279-3286

[2] HYDROGEN SPILLOVER THROUGH GAS-PHASE TRANSPORT OF HYDROGEN-ATOMS [J].

BAUMGARTEN, E ;

LENTESWAGNER, C ;

WAGNER, R .

JOURNAL OF CATALYSIS, 1989, 117 (02) :533-541

[3] REACTIVITY OF SPILLOVER HYDROGEN - REACTIVITY OF UNSATURATED-COMPOUNDS [J].

BAUMGARTEN, E ;

WAGNER, R ;

LENTESWAGNER, C .

JOURNAL OF CATALYSIS, 1987, 104 (02) :307-311

[4] HYDROGEN SPILLOVER AND H-D EXCHANGE IN THE SYSTEM PT/AL2O3 .2. EXPERIMENTAL PROBLEMS AND INFLUENCE OF OH-COVERAGE OR OD-COVERAGE [J].

BAUMGARTEN, E ;

DENECKE, E .

JOURNAL OF CATALYSIS, 1986, 100 (02) :377-382

[5] HYDROGEN SPILLOVER IN THE SYSTEM PT/AL2O3 .1. FUNDAMENTAL OBSERVATIONS [J].

BAUMGARTEN, E ;

DENECKE, E .

JOURNAL OF CATALYSIS, 1985, 95 (01) :296-299

[6]

BOCCUZZI F, 1987, SURF SCI, V183, pL285, DOI 10.1016/S0039-6028(87)80327-8

[7] AN EPR STUDY OF A PALLADIUM CATALYST USING A PBN (N-BENZYLIDENE-TERT-BUTYLAMINE N-OXIDE) SPIN TRAP - DIRECT DEMONSTRATION OF HYDROGEN SPILLOVER [J].

CARLEY, AF ;

EDWARDS, HA ;

MILE, B ;

ROBERTS, MW ;

ROWLANDS, CC ;

JACKSON, SD ;

HANCOCK, FE .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1994, (12) :1407-1408

[8] USE OF HYDROGEN-ATOMS FOR THE LOW-TEMPERATURE REDUCTION OF OXIDES [J].

CHE, M ;

CANOSA, B ;

GONZALEZELIPE, AR .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1982, 78 :1043-1050

[9] REVERSIBLE TI3+ FORMATION BY H-2 ADSORPTION ON M/TIO2 CATALYSTS [J].

CONESA, JC ;

SORIA, J .

JOURNAL OF PHYSICAL CHEMISTRY, 1982, 86 (08) :1392-1395

[10] ELECTRONIC EFFECTS IN STRONG METAL SUPPORT INTERACTIONS ON TITANIA DEPOSITED METAL-CATALYSTS [J].

HERRMANN, JM .

JOURNAL OF CATALYSIS, 1984, 89 (02) :404-412

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