Structure of [C4mpyr][NTf2] Room-Temperature Ionic Liquid at Charged Gold Interfaces

被引：101

作者：

Lauw, Yansen ^{[1
,2
]}

Horne, Michael D. ^{[2
]}

Rodopoulos, Theo ^{[2
]}

Lockett, Vera ^{[3
]}

Akgun, Bulent ^{[4
,5
]}

Hamilton, William A. ^{[1
]}

Nelson, Andrew R. J. ^{[1
]}

机构：

[1] Australian Nucl Sci & Technol Org, Kirrawee Dc, NSW 2232, Australia

[2] CSIRO Proc Sci & Engn, Clayton, Vic 3169, Australia

[3] Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia

[4] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[5] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

来源：

LANGMUIR | 2012年 / 28卷 / 19期

关键词：

ENHANCED RAMAN-SCATTERING; ELECTRICAL DOUBLE-LAYER; DIFFERENTIAL CAPACITANCE; ADSORPTION; ELECTRODEPOSITION; SPECTROSCOPY; ELECTROLYTE; ENERGY; MODEL; STM;

D O I：

10.1021/la3005757

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The structure of 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C(4)mpyr][NTf2]) room-temperature ionic liquid at an electrified gold interface was studied using neutron reflectometry, cyclic voltammetry, and differential capacitance measurements. Subtle differences were observed between the reflectivity data collected on a gold electrode at three different applied potentials. Detailed analysis of the fitted reflectivity data reveals an excess of [C(4)mpyr] at the interface, with the amount decreasing at increasingly positive potentials. A cation rich interface was found even at a positively charged electrode, which indicates a nonelectrostatic (specific) adsorption of [C(4)mpyr] onto the gold electrode.

引用

页码：7374 / 7381

页数：8

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