Electrocatalytic activation of Ni for H2 evolution by spontaneous deposition of Ru

被引：48

作者：

Bianchi, I ^{[1
]}

Guerrini, E ^{[1
]}

Trasatti, S ^{[1
]}

机构：

[1] Univ Milan, Dept Phys Chem & Electrochem, I-20133 Milan, Italy

来源：

CHEMICAL PHYSICS | 2005年 / 319卷 / 1-3期

关键词：

electrocatalysis; H-2; evolution; spontaneous deposition; Ru overlayer; Ni electrode;

D O I：

10.1016/j.chemphys.2005.06.042

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：

Ni was activated by spontaneous deposition of Ru carried out in solutions of HCl containing RuCl3. The occurrence of Ru deposition was confirmed by EDX and XPS and followed as a function of deposition time by cyclic voltammetry and Tafel lines for H-2 evolution in 1 mol dm(-3) KOH. Experiments were performed by varying temperature, HCl as well as RuCl3 concentration. The criticity of the presence of O-2 in solution was demonstrated. Ni activation by Ru is manifested by the appearance of H adsorption peaks in the voltammetric curve, and by the decrease of the Tafel slope for H-2 evolution from a 120 mV for bare Ni to ca. 40 mV. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：192 / 199

页数：8

共 26 条

[1] ELECTROCATALYSTS ON SUPPORTS .3. ELECTROCATALYTIC AND ADSORPTION PROPERTIES OF MICRODEPOSITS AND THIN-FILMS OF PLATINUM GROUP-METALS [J].

BAGOTZKY, VS ;

SKUNDIN, AM .

ELECTROCHIMICA ACTA, 1985, 30 (04) :485-491

[2] THE MECHANISM OF HYDROGEN EVOLUTION AT NICKEL CATHODES IN AQUEOUS SOLUTIONS [J].

BOCKRIS, JO ;

POTTER, EC .

JOURNAL OF CHEMICAL PHYSICS, 1952, 20 (04) :614-628

[3] Preparation and characterization of microporous Ni coatings as hydrogen evolving cathodes [J].

Brown, IJ ;

Sotiropoulos, S .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2000, 30 (01) :107-111

[4] AN EXPERIMENTAL CORRELATION BETWEEN POINTS OF ZERO CHARGE AND X-RAY PHOTOELECTRON-SPECTROSCOPY CHEMICAL-SHIFTS OF OXIDES [J].

CATTANIA, MG ;

ARDIZZONE, S ;

BIANCHI, CL ;

CARELLA, S .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1993, 76 :233-240

[5] Ultrathin films of ruthenium on low index platinum single crystal surfaces: An electrochemical study [J].

Chrzanowski, W ;

Wieckowski, A .

LANGMUIR, 1997, 13 (22) :5974-5978

[6] Scanning tunneling microscopy investigations of ruthenium- and osmium-modified Pt(100) and Pt(110) single crystal substrates [J].

Crown, A ;

Wieckowski, A .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2001, 3 (16) :3290-3296

[7]

ENTINA VS, 1968, ELEKTROKHIMIYA, V4, P457

[8] CATALYTIC HYDROGEN EVOLUTION ON RUTHENIUM AND PLATINUM NUCLEI [J].

GILES, RD ;

HARRISON, JA ;

THIRSK, HR .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1969, 20 (01) :47-&

[9] STATE OF ELECTRODEPOSITED HYDROGEN AT RUTHENIUM ELECTRODES [J].

HADZIJORDANOV, S ;

ANGERSTEINKOZLOWSKA, H ;

VUKOVIC, M ;

CONWAY, BE .

JOURNAL OF PHYSICAL CHEMISTRY, 1977, 81 (24) :2271-2279

[10] Electrochemical properties of ruthenised electrodes in the oxide layer region [J].

Horvat-Radosevic, V ;

Kvastek, K ;

Vukovic, M ;

Cukman, D .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2000, 482 (02) :188-201

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