OXYGEN REDUCTION ON SMALL SUPPORTED PLATINUM PARTICLES .2. CHARACTERIZATION BY X-RAY ABSORPTION-SPECTROSCOPY

被引：28

作者：

WEBER, RS ^{[1
]}

PEUCKERT, M ^{[1
]}

DALLABETTA, RA ^{[1
]}

BOUDART, M ^{[1
]}

机构：

[1] STANFORD UNIV, DEPT CHEM ENGN, STANFORD, CA 94305 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1988年 / 135卷 / 10期

关键词：

Carbon--Surfaces - Catalysts--Materials - Electrochemistry - Platinum and Alloys;

D O I：

10.1149/1.2095371

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

X-ray absorption spectra at the PtLIII edge were obtained during the electrochemical reduction of O2 for an electrocatalyst containing 1 nm clusters of Pt on carbon. Changes in the threshold peak area and edge position in the spectra suggest that the oxidation state of the metal decreases linearly with the applied potential in the range from 1010 to 900 mV (NHE), much like the behavior of bulk Pt electrodes. However, the overall oxidation state of the clusters is consistent with a surface stoichiometry nearer PtO0.5 rather than PtO proposed for the surface of bulk electrodes.

引用

页码：2535 / 2538

页数：4

共 35 条

[1] X-RAY PHOTOELECTRON-SPECTROSCOPY OF ADSORBED OXYGEN AND CARBONACEOUS SPECIES ON PLATINUM-ELECTRODES [J].

ALLEN, GC ;

TUCKER, PM ;

CAPON, A ;

PARSONS, R .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1974, 50 (03) :335-343

[2] PLATINUM CRYSTALLITE SIZE CONSIDERATIONS FOR ELECTROCATALYTIC OXYGEN REDUCTION .1. [J].

BETT, J ;

LUNDQUIST, J .

ELECTROCHIMICA ACTA, 1973, 18 (05) :343-348

[3] ELECTROCHEMICAL ACTIVITY OF DISPERSED PLATINUM [J].

BLURTON, KF ;

RUTT, DR ;

OSWIN, HG ;

GREENBERG, P .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1972, 119 (05) :559-+

[4] INFLUENCE OF PLATINUM CRYSTALLITE SIZE ON ELECTROCHEMICAL REDUCTION OF OXYGEN IN PHOSPHORIC-ACID [J].

BREGOLI, LJ .

ELECTROCHIMICA ACTA, 1978, 23 (06) :489-492

[5] PLATINUM BRONZES .3. REINVESTIGATION OF COMPOSITION OF ADAMS CATALYST (1) [J].

CAHEN, D ;

IBERS, JA .

JOURNAL OF CATALYSIS, 1973, 31 (03) :369-371

[6]

Dalla Betta R. A., 1981, J CATAL, V69, P514

[7]

DALLABETTA RA, 1972, 5TH P INT C CAT, P1329

[8] DEPENDENCE OF KINETICS OF 02 DISSOLUTION AT PT ON CONDITIONS FOR ADSORPTION OF REACTION INTERMEDIATES [J].

DAMJANOVIC, A ;

GENSHAW, MA .

ELECTROCHIMICA ACTA, 1970, 15 (07) :1281-+

[9] ELECTRODE KINETICS OF OXYGEN REDUCTION ON OXIDE-FREE PLATINUM ELECTRODES [J].

DAMJANOVIC, A ;

BRUSIC, V .

ELECTROCHIMICA ACTA, 1967, 12 (06) :615-+

[10] X-RAY PHOTOELECTRON SPECTROSCOPIC STUDIES OF OXIDE-FILMS ON PLATINUM AND GOLD ELECTRODES [J].

DICKINSON, T ;

POVEY, AF ;

SHERWOOD, PMA .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1975, 71 (02) :298-311

← 1 2 3 4 →