Enhanced water electrolysis: Electrocatalytic generation of oxygen gas at manganese oxide nanorods modified electrodes
Enhanced water electrolysis: Electrocatalytic generation of oxygen gas at manganese oxide nanorods modified electrodes
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DOI：
10.1016/j.elecom.2007.06.011
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发表时间：
2007-08-01
影响因子：
5.4
通讯作者：
Ohsaka, Takeo
中科院分区：
文献类型：
--
作者：
El-Deab, Mohamed S.;Awad, Mohamed I.;Ohsaka, Takeo
本研究涉及氧化锰纳米棒修饰的 Pt、Au 和 GC 电极在 0.5 M KOH 溶液中电催化释放氧气。电化学测量表明，电沉积锰氧化物纳米颗粒（nano-MnOx）后，Pt、Au和GC电极对析氧反应（OER）的电催化活性显着增强，即修饰后的Pt、Au和GC电极上OER的起始电位负值约300、550和300 mV。 分别与裸露（即未修改）电极相比。 MnOx 电沉积在多孔纳米纹理结构中，均匀覆盖基材的整个表面。单晶锰酸盐相（γ-MnOOH）的MnOx作为催化介体发挥着至关重要的作用，它促进水氧化成分子氧过程中的电荷转移，从而在较低的正电势下完成OER。 (C) 2007 Elsevier B.V. 保留所有权利。
This study is concerned with the electrocatalytic evolution of oxygen gas at manganese oxide nanorods modified Pt, Au and GC electrodes in 0.5 M KOH solution. The electrochemical measurements revealed a significant enhancement of the electrocatalytic activity of the Pt, Au and GC electrodes towards the oxygen evolution reaction (OER) upon the electrodeposition of manganese oxide nanoparticles (nano-MnOx), that is, the onset potentials of the OER at the modified Pt, Au and GC electrodes are more negative by about 300, 550 and 300 mV, respectively, compared with the bare (i.e., unmodified) electrodes. MnOx is electrodeposited in a porous nano-texture structure which covers the entire surface of the substrates homogeneously. The MnOx of a single crystalline manganite phase (gamma-MnOOH) plays a vital role as a catalytic mediator, which facilitates the charge transfer during the water oxidation into molecular oxygen and thus the OER is accomplished at less positive potentials. (C) 2007 Elsevier B.V. All rights reserved.