Electrochemical behaviour of palladium electrode: Oxidation, electrodissolution and ionic adsorption

氧化物 电化学 贵金属 离子键合 Pourbaix图 无机化学 电解质 化学 吸附 金属 电极 极化(电化学) 电极电位 催化作用 离子 有机化学 物理化学
作者
M. Grdeń,Mariusz Łukaszewski,Gregory Jerkiewicz,A. Czerwiński
出处
期刊:Electrochimica Acta [Elsevier]
卷期号:53 (26): 7583-7598 被引量:422
标识
DOI:10.1016/j.electacta.2008.05.046
摘要

Abstract In electrochemistry, Pourbaix diagrams also known as potential-pH diagrams map out the regions of stability of metals as well as the regions of possible existence of stable compounds. The stable states other than the metallic one are macroscopic compounds, typically oxides and hydroxides, or their hydrated forms. Yet, several noble metals possess the ability to form thin surface oxides, to adsorb anions, and to adsorb or to absorb hydrogen in the potential range of water stability. Palladium is a unique noble metal owing to its ability to adsorbed and to absorb H, as well as to form compact and stable surface oxides. Anodic polarization of Pd results in the formation of a surface oxide. Thus, a great majority of anodic electrode processes takes place not at a metallic surface but at a surface covered with an oxide layer. Although thin surface oxides reveal metallic conductivity, the presence of O-containing species affects the electron transfer kinetics and the adsorption behaviour of reactants, intermediates, and products. Thus, the electrocatalytic properties of Pd electrodes, and the mechanism and kinetics of the reaction under consideration are strongly affected by the oxide layer, its thickness, chemical composition (Pd oxidation state and nature of O-containing species) and 3D structure, degree of oxide hydration, and electronic properties. This contribution presents an overview of the current understanding of electro-oxidation of Pd in aqueous acidic and basic electrolytes. In particular, it describes the formation of Pd oxides under various experimental conditions and discusses their chemical and physical nature. It examines the reduction of O-containing species present on Pd electrodes as well as the adsorption of anions and cations. Since Pd can undergo electrodissolution that results in material loss, the process is analyzed in relation to experimental parameters. Recent developments in the electrochemical behaviour of single-crystal Pd electrodes are discussed. Electrochemical parameters such as the potential of zero charge, potential of zero total charge and potential of zero free charge are of importance to the structure of the electric double layer; thus, their values are discussed in relation to the absence/presence of Pd surface oxides. Finally, various experimental procedures commonly used to determine the real surface area of Pd electrodes are outlined and compared.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
乘风的法袍完成签到,获得积分10
刚刚
Owen应助猪猪猪采纳,获得10
刚刚
轻歌水越发布了新的文献求助10
1秒前
轻松的飞阳完成签到 ,获得积分10
2秒前
翁萍完成签到,获得积分10
2秒前
2秒前
ntrip完成签到,获得积分10
2秒前
马小马发布了新的文献求助10
2秒前
安详的盼波完成签到,获得积分10
3秒前
zzz发布了新的文献求助10
4秒前
尼可刹米洛贝林完成签到,获得积分10
5秒前
刘YF发布了新的文献求助10
5秒前
火星上的盼秋完成签到,获得积分10
5秒前
wuwa完成签到,获得积分10
5秒前
知不道完成签到,获得积分10
5秒前
健身boy完成签到,获得积分10
5秒前
5秒前
坚定的琦发布了新的文献求助10
6秒前
但愿完成签到,获得积分10
6秒前
vanilla完成签到 ,获得积分10
6秒前
湛刘佳完成签到 ,获得积分10
6秒前
机智灵薇完成签到,获得积分10
6秒前
科研通AI2S应助小哲采纳,获得30
6秒前
ch3oh完成签到,获得积分10
7秒前
畅快的长颈鹿完成签到 ,获得积分10
8秒前
8秒前
8秒前
:!完成签到,获得积分10
8秒前
陈亮完成签到,获得积分20
8秒前
王王完成签到,获得积分10
9秒前
唐文硕发布了新的文献求助10
9秒前
Jasper应助爱哭的天平秤采纳,获得20
10秒前
项之桃完成签到,获得积分10
10秒前
樱桃小贩完成签到,获得积分10
10秒前
尊敬枕头完成签到 ,获得积分10
10秒前
祝香之完成签到 ,获得积分10
10秒前
callmecjh完成签到,获得积分10
11秒前
YQJ完成签到,获得积分10
11秒前
11秒前
神经元neuron完成签到,获得积分10
11秒前
高分求助中
The late Devonian Standard Conodont Zonation 2000
Nickel superalloy market size, share, growth, trends, and forecast 2023-2030 2000
The Lali Section: An Excellent Reference Section for Upper - Devonian in South China 1500
Very-high-order BVD Schemes Using β-variable THINC Method 870
Mantiden: Faszinierende Lauerjäger Faszinierende Lauerjäger 800
PraxisRatgeber: Mantiden: Faszinierende Lauerjäger 800
Fundamentals of Dispersed Multiphase Flows 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3253407
求助须知:如何正确求助?哪些是违规求助? 2895987
关于积分的说明 8289373
捐赠科研通 2564786
什么是DOI,文献DOI怎么找? 1392518
科研通“疑难数据库(出版商)”最低求助积分说明 652230
邀请新用户注册赠送积分活动 629528