Synthesis of Small-Sized Freestanding Co3O4 Nanosheets with Improved Activity for H2O2 Sensing and Oxygen Evolution
Synthesis of Small-Sized Freestanding Co3O4 Nanosheets with Improved Activity for H2O2 Sensing and Oxygen Evolution
复制标题
合成小型独立式 Co3O4 纳米片，提高 H2O2 传感和析氧活性
DOI：
10.1149/2.016303jes
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发表时间：
2013-01-01
影响因子：
3.9
通讯作者：
Cao, Chunan
中科院分区：
文献类型：
--
作者：
Fan, Yuqian;Zhang, Na;Cao, Chunan
通过一种新颖而简单的电化学方法，在导电基底上成功地合成了小尺寸的独立式Co 3 O 4纳米片。合成后原样的片具有边长为30 +/-10 nm和约10 +/-5 nm的小尺寸，其中大多数片垂直于基底放置。产品的尺寸小、二维形状和独立姿态等综合特性可以导致高表面积与体积比、最大化暴露表面而不发生颗粒聚集、强亲和力和良好导电性的综合优势。在电化学测试中，合成的Co 3 O 4纳米片在0- 1.8mM浓度范围内对H2 O2的灵敏度提高到0.56 A M-1cm（-2），检测下限为1 μ M，同时表现出良好的析氧性能，具有低的析氧过电位、高的催化效率和持久的稳定性。(C)2013年电化学学会。[DOI：10.1149/2.016303jes]版权所有。
Small-sized freestanding Co3O4 nanosheets have been successfully synthesized on conductive substrate via a novel and simple electrochemical-based strategy. The as-synthesized sheets have a small size of 30 +/- 10 nm in edge length and about 10 +/- 5 nm in thickness with most sheets lying perpendicular to the substrate. The combined properties of products such as small size, two-dimension shape and freestanding pose could lead to integrative advantages of high surface-to-volume ratio, the maximized exposed surfaces without particles aggregation, strong affinity and good conductivity. As for electrochemical tests, the as-synthesized Co3O4 nanosheets show an improved sensitivity of similar to 0.56 A M-1 cm(-2) with lower detection limit of 1 mu M at concentration range of 0-1.8 mM for H2O2 sensing, and also exhibit good performance for oxygen evolution with low evolution over-potential, high catalytic efficiency and durable stability. (C) 2013 The Electrochemical Society. [DOI: 10.1149/2.016303jes] All rights reserved.