Electrospun palladium nanoparticle-loaded carbon nanofibers and their electrocatalytic activities towards hydrogen peroxide and NADH
Electrospun palladium nanoparticle-loaded carbon nanofibers and their electrocatalytic activities towards hydrogen peroxide and NADH
复制标题
电纺钯纳米颗粒负载碳纳米纤维及其对过氧化氢和 NADH 的电催化活性
DOI：
10.1002/adfm.200700729
复制
发表时间：
2008-02-11
影响因子：
19
通讯作者：
You, Tianyan
中科院分区：
文献类型：
--
作者：
Huang, Jianshe;Wang, Dawei;You, Tianyan
采用静电纺丝和热处理相结合的方法制备了载钯碳纳米纤维（Pd/CNFs）。扫描电子显微镜（SEM）和透射电子显微镜（TEM）的图像显示，球形钯纳米粒子（NPs）是分散在CNFs的表面或嵌入CNFs。X射线衍射（XRD）分析表明，在还原和碳化过程中形成了Pd的立方相，Pd纳米颗粒的存在促进了碳纳米纤维的石墨化。电化学阻抗谱（EIS）和循环伏安法（CV）表明，该纳米复合材料具有较高的电导率，并加速了电子转移。Pd/CNF-CPE修饰碳糊电极在低电位下对H2 O2和NADH有直接的无介质响应。评价了Pd/CNF-CPE对H2 O2还原和NADH氧化的分析性能。高灵敏度，宽的线性范围，良好的重现性，和最小的表面污染，使该Pd/CNF-CPE电流型H2 O2或NADH传感器的一个有前途的候选人。
Palladium nanoparticle-loaded carbon nanofibers (Pd/CNFs) were synthesized by the combination of electrospinning and thermal treatment processes. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images show that spherical Pd nanoparticles (NPs) are well-dispersed on the surfaces of CNFs or embedded in CNFs. X-ray diffraction (XRD) pattern indicates that cubic phase of Pd was formed during the reduction and carbonization processes, and the presence of Pd NPs promoted the graphitization of CNFs. This nanocomposite material exhibited high electric conductivity and accelerated the electron transfer, as verified by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The Pd/CNF-modified carbon paste electrode (Pd/CNF-CPE) demonstrated direct and mediatorless responses to H2O2 and NADH at low potentials. The analytical performances of the Pd/CNF-CPEs towards reduction of H2O2 and oxidation of NADH were evaluated. The high sensitivity, wider linear range, good reproducibility, and the minimal surface fouling make this Pd/CNF-CPE a promising candidate for amperometric H2O2 or NADH sensor.