Detail publikace

The Structure of the Cobalt Oxide/Au Catalyst Interface in Electrochemical Water Splitting

FESTER, J. MAKOVEEV, A. GRUMELLI, D. GUTZLER, R. SUN, Z. RODRÍGUEZ-FERNÁNDEZ, J. KERN, K. LAURITSEN, J.

Originální název

The Structure of the Cobalt Oxide/Au Catalyst Interface in Electrochemical Water Splitting

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The catalytic synergy between cobalt oxide and gold leads to strong promotion of the oxygen evolution reaction (OER)—one half-reaction of electrochemical water splitting. However, the mechanism behind the enhancement effect is still not understood, in part due to a missing structural model of the active interface. Using a novel interplay of cyclic voltammetry (CV) for electrochemistry integrated with scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) on an atomically defined cobalt oxide/Au(111) system, we reveal here that the supporting gold substrate uniquely favors a flexible cobalt-oxyhydroxide/Au interface in the electrochemically active potential window and thus suppresses the formation of less active bulk cobalt oxide morphologies. The findings substantiate why optimum catalytic synergy is obtained for oxide coverages on gold close to or below one monolayer, and provide the first morphological description of the active phase during electrocatalysis.

Klíčová slova

electrocatalysis · metal oxides · oxygen evolution reactions · scanning tunneling microscopy

Autoři

FESTER, J.; MAKOVEEV, A.; GRUMELLI, D.; GUTZLER, R.; SUN, Z.; RODRÍGUEZ-FERNÁNDEZ, J.; KERN, K.; LAURITSEN, J.

Vydáno

10. 9. 2018

ISSN

1433-7851

Periodikum

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Ročník

57

Číslo

37

Stát

Spolková republika Německo

Strany od

11893

Strany do

11897

Strany počet

5

BibTex

@article{BUT149843,
  author="Jakob {Fester} and Anton Olegovich {Makoveev} and Doris {Grumelli} and Rico {Gutzler} and Zhaozong {Sun} and Jonathan {Rodríguez-Fernández} and Klaus {Kern} and Jeppe V. {Lauritsen}",
  title="The Structure of the Cobalt Oxide/Au Catalyst Interface in
Electrochemical Water Splitting",
  journal="ANGEWANDTE CHEMIE-INTERNATIONAL EDITION",
  year="2018",
  volume="57",
  number="37",
  pages="11893--11897",
  doi="10.1002/anie.201804417",
  issn="1433-7851"
}