Pd-Ru electrodeposits with high hydrogen absorption capacity

被引：17

作者：

Hubkowska, K. ^{[1
]}

Lukaszewski, M. ^{[1
]}

Czerwinski, A. ^{[1
]}

机构：

[1] Warsaw Univ, Dept Chem, PL-02093 Warsaw, Poland

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 20卷

关键词：

Palladium; Ruthenium; Electrodeposits; Limited volume electrodes; Hydrogen absorption; PALLADIUM-RUTHENIUM ALLOYS; THERMODYNAMIC PROPERTIES; HYDRIDES;

D O I：

10.1016/j.elecom.2012.04.022

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Thin Pd-Ru deposits with 90-100% Pd in the bulk were obtained electrochemically from the mixtures of PdCl2 and RuCl3 aqueous solutions. Hydrogen absorption in Pd-Ru deposits was performed using cyclic voltammetry and chronoamperometry from 0.5 H2SO4 solutions at room temperature. Pd-Ru electrodeposits with a high Pd bulk content (above 97%) can absorb more hydrogen than pure Pd, with the hydrogen-to-metal atomic ratio up to 0.85 (as compared with 0.74 for Pd). The absorption capacity of Pd-Ru electrodes containing less than 97% Pd gradually decreases and the H/M ratio drops to ca. 0.50 for electrodes with 90% Pd. With increasing Ru content the potential corresponding to the alpha- and beta-phase transition is shifted negatively with respect to that for pure Pd. Hydrogen absorption properties of Pd-Ru electrodes may be explained taking into account changes in electronic structure probably resulting from alloy formation between Pd and Ru. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：175 / 177

页数：3

共 18 条

[1] STRUCTURAL-CHANGES INDUCED BY HYDROGEN ABSORPTION IN PALLADIUM AND PALLADIUM-RUTHENIUM ALLOYS [J].