Electrocatalytic Water Oxidation by a Highly Active and Robust -Mn2O3 Thin Film Sintered on a Fluorine-Doped Tin Oxide Electrode

被引：17

作者：

Zahran, Zaki N. ^{[1
,2
]}

Mohamed, Eman A. ^{[1
]}

Ohta, Takehiro ^{[3
]}

Naruta, Yoshinori ^{[1
,4
]}

机构：

[1] Chubu Univ, Ctr Chem Energy Convers Res, Inst Sci & Technol Res, Kasugai, Aichi 4878501, Japan

[2] Tanta Univ, Fac Sci, Tanta 31527, Egypt

[3] Univ Hyogo, Grad Sch life Sci, Picobiol Inst, Mikazuki, Hyogo 6795148, Japan

[4] JST ACT C, Kawaguchi, Saitama 3320012, Japan

来源：

CHEMCATCHEM | 2016年 / 8卷 / 03期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

electrocatalysis; nanostructures; oxygen evolution; thin films; water chemistry; OXYGEN-EVOLVING CATALYST; MANGANESE OXIDES; ANODIC CHARACTERISTICS; COBALT-PHOSPHATE; METAL-OXIDES; EVOLUTION; EFFICIENT; MNO2; MECHANISMS; ELEMENTS;

D O I：

10.1002/cctc.201501073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

As a water oxidation catalyst, -Mn2O3 has higher activity than other manganese oxides. However, the robustness of the catalyst supported on conducting electrodes has only been tested for a short time (1h) and it shows a gradual decrease in activity. Furthermore, the turnover number (TON) and turnover frequency (TOF) have not been reported. Herein, we optimized the preparation of transparent nanocrystalline -Mn2O3 on a fluorine-doped tin oxide (FTO) electrode, and this resulting catalyst shows, in neutral aqueous 0.1m potassium phosphate buffer solution, a high electrocatalytic water oxidation activity with a TON of 230, a TOF of 5.3x10(-3)s(-1) based on the all-Mn content, and a TOF of 2.1s(-1) based on the amount of surface-active Mn with a Faradic efficiency of 96.7% at an overpotential of 470mV. The robustness of the -Mn2O3/FTO electrocatalyst was tested for a long time (80h) without a decrease in activity.

引用

页码：532 / 535

页数：4

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