Oxygen Reduction Investigation on Sputtered ZnO Layers with Nano-granular Structure

被引：5

作者：

Costa, Josiane Soares ^{[1
,2
]}

Prestat, Michel ^{[1
]}

Lescop, Benoit ^{[2
]}

Rioual, Stephane ^{[2
]}

Tribollet, Bernard ^{[3
]}

Holzer, Lorenz ^{[4
]}

Pelissier, Krystel ^{[1
]}

Thierry, Dominique ^{[1
]}

机构：

[1] French Corros Inst, 220 Rue Pierre Rivoalon, F-29200 Brest, France

[2] Univ Brest, Lab STICC, CNRS, UMR 6285, F-29200 Brest, France

[3] Sorbonne Univ, CNRS, LISE, F-75005 Paris, France

[4] Zurich Univ Appl Sci, ICP, Wildbachstr 21, CH-8400 Winterthur, Switzerland

来源：

CHEMELECTROCHEM | 2019年 / 6卷 / 20期

关键词：

nanostructures; oxygen reduction; sputtering; thin films; zinc oxide; THIN-FILMS; ZINC; CORROSION; MECHANISM; ELECTRODE; MODEL; MICROSTRUCTURE; KINETICS; RAMAN; DC;

D O I：

10.1002/celc.201901298

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Zinc oxide (ZnO) films with nano-granular structure were deposited by radio-frequency magnetron sputtering. The absence of preferred orientation was verified by XRD. HAADF-STEM images revealed a nanoporous structure with pore and grain sizes around 10 nm. The narrowness of the pores enabled to approximate that oxygen reduction takes place at the surface of the layers. During cathodic polarization, the surface of the electrodes became rougher due to the development of nodules on the surface. The ZnO electrodes exhibit a high activity towards oxygen reduction in KOH solution (pH=10). Rotating ring-disk electrode measurements coupled with reaction modelling allowed to quantitatively demonstrate that the direct reduction prevailed with the indirect pathway being active as well.

引用

页码：5321 / 5330

页数：10

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