The potential of zero total charge of Pt nanoparticles and polycrystalline electrodes with different surface structure The role of anion adsorption in fundamental electrocatalysis

被引：171

作者：

Chen, Qing-Song ^{[1
,2
]}

Solla-Gullon, Jose ^{[1
]}

Sun, Shi-Gang ^{[2
]}

Feliu, Juan M. ^{[1
]}

机构：

[1] Univ Alicante, Inst Electrochem, E-03080 Alicante, Spain

[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 27期

关键词：

Potential of zero total charge; Shape-controlled Pt nanoparticles; Polycrystalline Pt; CO coverage; Anion adsorption; Real surface area; SULFURIC-ACID-SOLUTIONS; SHAPE-DEPENDENT ELECTROCATALYSIS; SCANNING-TUNNELING-MICROSCOPY; SINGLE-CRYSTAL ELECTRODES; LIMITING OXYGEN COVERAGE; SMOOTH PLATINUM ANODES; OXIDE FILM FORMATION; ELECTROCHEMICAL-BEHAVIOR; PT(111) ELECTRODES; CARBON-MONOXIDE;

D O I：

10.1016/j.electacta.2010.03.050

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In the present paper anion effects are discussed on different shape-controlled Pt nanoparticles as well as on polycrystalline Pt electrodes of different surface structures In particular the potentials of zero total charge (pztc) were determined by using the CO displacement approach both in sulphuric and perchloric media The CO monolayer oxidative stripping was studied on the different samples CO coverages were independent of the electrolyte provided that the true CO stripping charges corrected for double layer contributions are compared to the charge involved only in the hydrogen adsorption region The classical charge density normalization process is discussed and small changes are proposed Then criteria to evaluate the real surface area of platinum electrodes from charge measurements are proposed in both electrolytes (C) 2010 Elsevier Ltd All rights reserved

引用

页码：7982 / 7994

页数：13

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