Superstable advanced hydrogen peroxide transducer based on transition metal hexacyanoferrates.
Superstable advanced hydrogen peroxide transducer based on transition metal hexacyanoferrates.
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DOI：
10.1021/ac1033352
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发表时间：
2011-02
影响因子：
7.4
通讯作者：
Natalya A. Sitnikova;A. Borisova;M. Komkova;A. Karyakin
中科院分区：
文献类型：
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作者：
Natalya A. Sitnikova;A. Borisova;M. Komkova;A. Karyakin
我们报告了通过顺序沉积铁六氰基铁酸盐和镍六氰基铁酸盐（NiHCF）层制成的超稳定过氧化氢（H（2）O（2））传感器。后者的化学和机械稳定性以及其结构与普鲁士蓝(PB) 的相似性为最有利的H(2)O(2) 传感器提供了显着的稳定性。电化学沉积的 5 个双层 PB-NiHCF 在 1 mM H(2)O(2) 的连续壁喷射流下超过 2 小时表现出完全稳定性，将电流保持在 0.2 mA cm(-2) 水平，而普通普鲁士蓝在前 20-25 分钟内失去了一半的响应。即使以开路方式沉积在丝网印刷电极上，PB-NiHCF 双层也能显着提高所得传感器对碱性溶液和铁配体的耐受性。尽管灵敏度降低了 2-2.5 倍（与普通普鲁士蓝相比），但顺序沉积的 PB-NiHCF 双层由于噪声水平降低而提供了类似的传感器动态范围。
We report on a superstable hydrogen peroxide (H(2)O(2)) transducer made by sequential deposition of the iron- and nickel-hexacyanoferrate (NiHCF) layers. Both chemical and mechanical stability of the latter, as well as similarity of its structure to Prussian Blue (PB) provide a substantial stabilization of the most advantageous H(2)O(2) transducer. The electrochemically deposited five bilayers of PB-NiHCF exhibit a complete stability under the continuous wall-jet flow of 1 mM of H(2)O(2) during more than 2 h, maintaining current at a level of 0.2 mA cm(-2), whereas common Prussian Blue loses half of its response within the first 20-25 min. Even being deposited in the open circuit regime on screen-printed electrodes, PB-NiHCF bilayers dramatically improve tolerance of the resulting transducer to alkaline solutions and iron ligands. Despite their 2-2.5 times decreased sensitivity (compared to common Prussian Blue), the sequentially deposited bilayers of PB-NiHCF provide a similar dynamic range of the transducer due to the decreased noise level.