Department of Chemistry, State Key Lab of Molecular Engineering of Polymer and Institute of Biomedical Sciences, Fudan University, Shanghai 200433, China.
Talanta. 2012 Sep 15;99:256-61. doi: 10.1016/j.talanta.2012.05.048. Epub 2012 May 29.
Palladium nanoparticles (Pd NPs) were loaded in situ on novel mesoporous carbon nanospheres (MCNs), which possess high specific surface area and large pore volume. The resulting Pd/MCNs hybrid nanocomposites were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). By using Pd/MCNs as the catalyst matrices to modify the surface of glassy carbon electrode, a nonenzymatic sensor was developed for the determination of hydrogen peroxide (H(2)O(2)). Cyclic voltammetry (CV) and amperometry (at an applied potential of -0.30 V versus SCE) were used to study and optimize the performance of the electrochemical sensor. It was demonstrated that the sensor not only exhibits good electrocatalytic activity toward the reduction of H(2)O(2) but also has high sensitivity (307.5 μA mM(-1) cm(-2)), low detection limit of 1.0 μM, and wide linear response range from 7.5 μM to 10 mM. Moreover, the sensor shows excellent stability and anti-interference capability for the detection of H(2)O(2).
钯纳米粒子（Pd NPs）被原位负载在具有高比表面积和大孔体积的新型介孔碳纳米球（MCNs）上。所得的 Pd/MCNs 杂化纳米复合材料通过 X 射线衍射（XRD）和透射电子显微镜（TEM）进行了表征。通过将 Pd/MCNs 用作催化剂基质来修饰玻碳电极的表面，开发了一种用于测定过氧化氢（H（2）O（2））的非酶传感器。循环伏安法（CV）和安培法（相对于 SCE 的施加电位为-0.30 V）用于研究和优化电化学传感器的性能。结果表明，该传感器不仅对 H（2）O（2）的还原表现出良好的电催化活性，而且具有高灵敏度（307.5 μA mM（-1）cm（-2）），低检测限为 1.0 μM，线性响应范围从 7.5 μM 到 10 mM。此外，该传感器在检测 H（2）O（2）时表现出出色的稳定性和抗干扰能力。
