A novel titanium-supported Ag/Ti electrode for the electro-oxidation of hydrazine

被引：43

作者：

Yi, Qingfeng ^{[1
]}

Li, Lei ^{[1
]}

Yu, Wenqiang ^{[1
]}

Zhou, Zhihua ^{[1
]}

Xu, Guorong ^{[1
]}

机构：

[1] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Hunan, Peoples R China

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2008年 / 295卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Hydrazine oxidation; Silver electrode; Hydrothermal method; Nanoparticles; Ti electrode;

D O I：

10.1016/j.molcata.2008.08.013

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：

Silver nanoparticles were directly deposited on the Surface of titanium by the hydrothermal method using polyethylene glycol as the reduction agent. The electrocatalytic activity of the prepared titanium-supported nanoAg/Ti electrode towards hydrazine oxidation in alkaline Solutions was evaluated using cyclic voltammetry (CV) and chronoamperometry (CA). The CV results show that the nanoAg/Ti electrode is electrochemically active towards hydrazine oxidation with oxidation potentials ranging between -0.6 and 0.6V vs. SCE. The onset potential of ca. -0.6 V vs. SCE for the hydrazine oxidation was recorded. A sharp increment in the current density of hydrazine oxidation with the increase of the hydrazine concentration was observed. CA results show stable steady-state current densities (i(ss)) for the hyrdrazine oxidation. For the anodic potential holding at 0.1 V, the CA measurement delivered the i(ss) value of over 0.58 mA cm(-2) mM(-1) in the presence of 20 mM hydrazine. A linear dependence of the i(ss) upon the hydrazine concentration was found in the range of 0-60 mM hydrazine. Results imply that the nanoAg/Ti electrode presents stable and significantly high electroactivity for the hydrazine oxidation. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：34 / 38

页数：5

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