Controlling Selectivity in the Chlorine Evolution Reaction over RuO2-Based Catalysts

被引：222

作者：

Exner, Kai S. ^{[1
]}

Anton, Josef ^{[2
]}

Jacob, Timo ^{[2
]}

Over, Herbert ^{[1
]}

机构：

[1] Univ Giessen, Dept Phys Chem, D-35392 Giessen, Germany

[2] Univ Ulm, Inst Electrochem, D-89069 Ulm, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2014年 / 53卷 / 41期

基金：

欧洲研究理事会;

关键词：

chlorine evolution; density functional calculations; electrocatalysis; ruthenium dioxide; selectivity; OXIDE SURFACES; OXYGEN; ELECTROCATALYSIS; MECHANISM; ANODES; ENERGY; WATER;

D O I：

10.1002/anie.201406112

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the industrially important Chlor-Alkali process, the chlorine evolution reaction (CER) over a ruthenium dioxide (RuO2) catalyst competes with the oxygen evolution reaction (OER). This selectivity issue is elucidated on the microscopic level with the single-crystalline model electrode RuO2(110) by employing density functional theory (DFT) calculations in combination with the concept of volcano plots. We demonstrate that one monolayer of TiO2(110) supported on RuO2(110) enhances the selectivity towards the CER by several orders of magnitudes, while preserving the high activity for the CER. This win-win situation is attributed to the different slopes of the volcano curves for the CER and OER.

引用

页码：11032 / 11035

页数：4

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