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首页> 外文期刊>Electrochimica Acta >Platinum nanoparticle-decorated carbon nanotube clusters on screen-printed gold nanofilm electrode for enhanced electrocatalytic reduction of hydrogen peroxide
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Platinum nanoparticle-decorated carbon nanotube clusters on screen-printed gold nanofilm electrode for enhanced electrocatalytic reduction of hydrogen peroxide

机译：丝网印刷金纳米膜电极上的铂纳米颗粒修饰的碳纳米管簇增强了过氧化氢的电催化还原

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摘要

In the present study the electrocatalytic behavior of platinum nanoparticle-decorated multi-walled carbon nanotube clusters vertically aligned on a screen-printed gold nanofilm electrode substrate (SPGFE/MWCNTC/PtNP) toward hydrogen peroxide was intensively investigated. Oriented multi-walled carbon nanotube clusters (MWCNTC) were firstly well-organized onto the screen-printed gold film electrode (SPGFE) surface by covalent immobilization, and then platinum nanoparticles (PtNPs) dispersed on the MWCNTC structure were in situ synthesized by electrochemically reducing chloroplatinic acid. It was demonstrated that the MWCNTC/PtNP hybrid structure on the SPGFE substrate could significantly enhance the electrochemical reduction of hydrogen peroxide in neutral solutions. Compared with platinum nanoparticles loading on disordered multi-walled carbon nanotubes (SPGFE/MWCNT/PtNP), the proposed SPGFE/MWCNTC/PtNP exhibited more sensitive responses for hydrogen peroxide reduction. The fabricated electrode provided linear current responses for hydrogen peroxide in the concentration range from 5 to 2000 μM with a detection limit of 1.23 μM. The non-enzymatic sensor also offered good reproducibility and high selectivity for hydrogen peroxide detection. The carbon nanotube cluster/platinum nanoparticle hybrid system holds great promise as a scaffold to fabricate enzyme biosensors.
机译：在本研究中，深入研究了垂直排列在丝网印刷金纳米膜电极基板（SPGFE / MWCNTC / PtNP）上的铂纳米粒子修饰的多壁碳纳米管簇对过氧化氢的电催化行为。首先通过共价固定将取向多壁碳纳米管簇（MWCNTC）良好地组织在丝网印刷的金膜电极（SPGFE）表面上，然后通过电化学还原原位合成分散在MWCNTC结构上的铂纳米颗粒（PtNP）。氯铂酸。结果表明，SPGFE基体上的MWCNTC / PtNP杂化结构可以显着增强中性溶液中过氧化氢的电化学还原。与负载在无序多壁碳纳米管（SPGFE / MWCNT / PtNP）上的铂纳米粒子相比，拟议的SPGFE / MWCNTC / PtNP对过氧化氢还原反应表现出更敏感的响应。制成的电极在5到2000μM的浓度范围内提供了过氧化氢的线性电流响应，检测极限为1.23μM。非酶传感器还提供了良好的重现性和对过氧化氢检测的高选择性。碳纳米管簇/铂纳米颗粒混合系统作为制造酶生物传感器的支架具有广阔的前景。

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