Structural effects in electrocatalysis: Formic acid oxidation at model and real Pt catalysts

被引：1
作者：
Lovic, J. D.
Gojkovic, S. Lj.
Popovic, K. Dj.
Tripkovic, D. V.
Tripkovic, A. V.
机构：
[1] Univ Belgrade, Inst Electrochem, ICTM, Belgrade 11000, Serbia
[2] Univ Belgrade, Fac Technol & Met, Belgrade 11000, Serbia
来源：
RECENT DEVELOPMENTS IN ADVANCED MATERIALS AND PROCESSES | 2006年 / 518卷
关键词：
electrode characterization; formic acid oxidation; Pt single crystals; Pt supported catalyst;
D O I：
10.4028/www.scientific.net/MSF.518.259
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Formic acid oxidation was studied at low-index Pt single crystals (model systems) as well as at the platinum catalyst supported on high area carbon (real catalyst) in HClO4. The Pt single crystals were characterized by LEED. The LEED patterns obtained after a mild heating of flame-annealed crystals have shown clean, well ordered unreconstructured surfaces. Pt-C supported catalyst was analyzed by AFM and STM in air and by XRD. AFM and STM images revealed the presence of Pt-C agglomerates of several tenth of nm consisting of Pt particles ranged from 2 nm to 6 nm. The electrocatalytic activity of these catalysts in formic acid oxidation increased in a sequence: Pt(100) < Pt(110) < Pt-C/GC < Pt(111).
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页码：259 / 264
页数：6
相关论文
共 16 条
[1]   STRUCTURAL EFFECTS IN ELECTROCATALYSIS [J].
ADZIC, RR ;
TRIPKOVIC, AV ;
OGRADY, WE .
NATURE, 1982, 296 (5853) :137-138
[2]   INFRARED SPECTROSCOPIC STUDY OF THE METHANOL ADSORBATES AT A PLATINUM-ELECTRODE .1. INFLUENCE OF THE BULK CONCENTRATION OF METHANOL UPON THE NATURE OF THE ADSORBATES [J].
BEDEN, B ;
HAHN, F ;
JUANTO, S ;
LAMY, C ;
LEGER, JM .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1987, 225 (1-2) :215-225
[3]  
BEWICK A, 1984, J ELECTROANAL CHEM, V160, P147
[4]   OXIDATION OF FORMIC-ACID AT NOBLE-METAL ELECTRODES .1. REVIEW OF PREVIOUS WORK [J].
CAPON, A ;
PARSONS, R .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1973, 44 (01) :1-7
[5]   PREPARATION OF MONO-CRYSTALLINE PT MICROELECTRODES AND ELECTROCHEMICAL STUDY OF THE PLANE SURFACES CUT IN THE DIRECTION OF THE (111) AND (110) PLANES [J].
CLAVILIER, J ;
FAURE, R ;
GUINET, G ;
DURAND, R .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1980, 107 (01) :205-209
[6]   FORMIC-ACID OXIDATION ON SINGLE-CRYSTAL PLATINUM-ELECTRODES - COMPARISON WITH POLYCRYSTALLINE PLATINUM [J].
CLAVILIER, J ;
PARSONS, R ;
DURAND, R ;
LAMY, C ;
LEGER, JM .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1981, 124 (1-2) :321-326
[7]   Electrocatalysis of formic acid and CO oxidation on antimony-modified Pt(111) electrodes [J].
Climent, V ;
Herrero, E ;
Feliu, JM .
ELECTROCHIMICA ACTA, 1998, 44 (8-9) :1403-1414
[8]   Early stages during the oxidation of HCOOH on single-crystal Pt electrodes as characterized by infrared spectroscopy [J].
Iwasita, T ;
Xia, XH ;
Herrero, E ;
Liess, HD .
LANGMUIR, 1996, 12 (17) :4260-4265
[9]   PARTICLE-SIZE EFFECTS FOR OXYGEN REDUCTION ON HIGHLY DISPERSED PLATINUM IN ACID ELECTROLYTES [J].
KINOSHITA, K .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1990, 137 (03) :845-848
[10]   ELECTROCATALYTIC OXIDATION OF SMALL ORGANIC-MOLECULES AT PLATINUM SINGLE-CRYSTALS [J].
LAMY, C ;
LEGER, JM .
JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE, 1991, 88 (7-8) :1649-1671
12