Oxygen evolution on well-characterized mass-selected Ru and RuO2 nanoparticles

被引：331

作者：

Paoli, Elisa A. ^{[1
]}

Masini, Federico ^{[1
]}

Frydendal, Rasmus ^{[1
]}

Deiana, Davide ^{[2
]}

Schlaup, Christian ^{[1
]}

Malizia, Mauro ^{[1
]}

Hansen, Thomas W. ^{[2
]}

Horch, Sebastian ^{[1
]}

Stephens, Ifan E. L. ^{[1
]}

Chorkendorff, Ib ^{[1
]}

机构：

[1] Ctr Individual Nanoparticle Funct, Dept Phys, DK-2800 Lyngby, Denmark

[2] Ctr Electron Nanoscopy, DK-2800 Lyngby, Denmark

来源：

CHEMICAL SCIENCE | 2015年 / 6卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

RUTHENIUM DIOXIDE; HYDROGEN-PRODUCTION; REDUCTION REACTION; PEM ELECTROLYSIS; OXIDE SURFACES; ACIDIC MEDIA; WATER; ELECTROCATALYSIS; ENERGY; ELECTRODES;

D O I：

10.1039/c4sc02685c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Oxygen evolution was investigated on model, mass-selected RuO2 nanoparticles in acid, prepared by magnetron sputtering. Our investigations include electrochemical measurements, electron microscopy, scanning tunneling microscopy and X-ray photoelectron spectroscopy. We show that the stability and activity of nanoparticulate RuO2 is highly sensitive to its surface pretreatment. At 0.25 V overpotential, the catalysts show a mass activity of up to 0.6 A mg(-1) and a turnover frequency of 0.65 s(-1), one order of magnitude higher than the current state-of-the-art.

引用

页码：190 / 196

页数：7

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