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Cobalt Phosphide (Co 2 P) with Notable Electrocatalytic Activity Designed for Sensitive and Selective Enzymeless Bioanalysis of Hydrogen Peroxide
Nanoscale Research Letters ( IF 5.418 ) Pub Date : 2021-01-13 , DOI: 10.1186/s11671-020-03469-9
Donghang Yin , Junyan Tang , Rongbiao Bai , Shuyi Yin , Mengnan Jiang , Zigui Kan , Hongmei Li , Fei Wang , Caolong Li

In this work, cobalt phosphide nanoparticles (Co2P NPs) were prepared by simple and mild hydrothermal method without the use of harmful phosphorous source. The morphological structure and surface component of Co2P were characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy measurements. Considering the excellent electrocatalytic reduction activity and good electrical conductivity of transition-metal phosphide, we fabricated Co2P NPs on indium tin oxide (ITO) substrate (Co2P/ITO) for H2O2 detection. The Co2P/ITO transducer displayed a rapid amperometric response less than 5 s, a broader response range from 0.001 to 10.0 mM and a low detection limit of 0.65 μM. In addition, the non-enzymatic Co2P/ITO sensor showed outstanding selectivity, reproducibility, repeatability and stability, all of which qualified the Co2P/ITO electrode for quite a reliable and promising biosensor for H2O2 sensing.



中文翻译:

具有明显电催化活性的磷化钴(Co 2 P),用于过氧化氢的灵敏和选择性无酶生物分析

在这项工作中,采用简单温和的水热法制备了磷化钴纳米颗粒(Co 2 P NPs),而没有使用有害的磷源。通过透射电子显微镜,X射线衍射和X射线光电子能谱测量表征了Co 2 P的形态结构和表面成分。考虑到过渡金属磷化物的优异的电催化还原活性和良好的导电性,我们在铟锡氧化物(ITO)基板(Co 2 P / ITO)上制备了用于H 2 O 2检测的Co 2 P NPs 。钴2P / ITO传感器显示的快速安培响应小于5 s,响应范围从0.001到10.0 mM,检测限很低,为0.65μM。此外,非酶促Co 2 P / ITO传感器具有出色的选择性,可重复性,可重复性和稳定性,所有这些都使Co 2 P / ITO电极成为了一种可靠且有希望的H 2 O 2传感生物传感器。

更新日期:2021-01-13
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