检索结果-南通市图书馆

Effect of TiO_2 nanoparticles on hydrogen evolution reaction activity of Ni coatings

International Journal of Minerals,Metallurgy and Materials 2018年第4期25卷 472-479页

作者： Revanna Kullaiah Liju Elias ampar chitharanjan hegde Electrochemistry Research Lab Department of Chemistry National Institute of Technology Karnataka

The electrocatalytic activity of electrodeposited Ni and Ni–TiO2 coatings with regard to the alkaline hydrogen evolution reaction（HER） was investigated. The Ni coatings were electrodeposited from an acid chloride bath at different current densities, and their HER activities were examined in a 1.0-mol·L^-1 KOH medium. The variations in the HER activity of the Ni coatings with changes in surface morphology and composition were examined via the electrochemical dissolution and incorporation of nanoparticles. Electrochemical analysis methods were used to monitor the HER activity of the test electrodes; this activity was confirmed via the quantification of gases that evolved during the analysis. The obtained results demonstrated that the Ni–TiO2 nanocomposite test electrode exhibited maximum activity toward the alkaline HER. The surface appearance, composition, and the phase structure of all developed coatings were analyzed using scanning electron microscopy（SEM）, energy dispersive spectroscopy（EDS）, and X-ray diffraction（XRD）, respectively. The improvement in the electrocatalytic activity of Ni–TiO2 nanocomposite coating toward HER was attributed to the variation in surface morphology and increased number of active sites.

关键词： coatings electrodeposition nanocomposite electrocatalysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Kinetic and mechanism of oxidation of thiocarbohydrazide and its metal complex by acid bromate in aqueous and partial aqueous media

引用

Chinese Journal of Chemistry 1993年第5期11卷 435-445页

作者： PARDHASARADHI V. hegde A.chitharanjan GOWDA B.Thimme Department of Post-Graduate Studies and Research in Chemistry Mangalore University Mangalagangothri 574 199MangaloreIndia

The kinetics of oxidation of thiocarbohydrazide in the free and zinc(Ⅱ)-bound states by acid bromate have been studied in aqueous and water-acetic acid(1:1,V/V)media under varying conditions,both in the absence and presence of added bromide *** rates of oxidations show first order kinetics in[bromate]in all the cases,but exhibit different kinetic behaviour in[substrate]and [H^+].Oxidation of TCH in aqueous medium shows zero order in[TCH]and nearly second order in[H^+], while oxidation in aqueous acetic acid shows two ranges in[H^+].The rate shows first and fractional order kinetics in[TCH]in the first and second acid *** observed in the presence of Br^- are similar to those observed for oxidation of TCH in second acid *** addition,the reaction shows fractional order in[Br^-].Oxidation of TCH in Zn(Ⅱ)-bound state exhibits first order kinetics in [substrate]and second order in[H^+].Increase in ionic strength of the medium decreases the rate in all the *** in acetic acid composition of the solvent increases the *** consistent with the observed results have been considered and the rate laws *** rate limiting steps have been identified and the coefficients of these steps have been calculated at different *** related activation parameters have also been *** validity of the deduced rate laws has also been tested by recalculating the rate constants from them as[TCH]and[H^+]are varied.

关键词： TCH Kinetic and mechanism of oxidation of thiocarbohydrazide and its metal complex by acid bromate in aqueous and partial aqueous media acid

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：