Glucose oxidation reaction at palladium-carbon nano-onions in alkaline media
Glucose oxidation reaction at palladium-carbon nano-onions in alkaline media
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DOI：
10.1007/s10008-020-04729-5
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发表时间：
2020-07
影响因子：
2.5
通讯作者：
C. Vélez;Joesene Soto-Pérez;J. Corchado-García;E. Larios;P. Fulvio;L. Echegoyen;C. Cabrera
中科院分区：
文献类型：
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作者：
C. Vélez;Joesene Soto-Pérez;J. Corchado-García;E. Larios;P. Fulvio;L. Echegoyen;C. Cabrera
用物理和电化学表征技术研究了无负载碳纳米洋葱(Pd/CNOS)在钯上的葡萄糖氧化反应。采用旋转圆盘浆料电极(RoDSE)技术在碳载体上电沉积Pd。通过不同的物理和电化学表征手段，比较了Pd/CNO催化剂和优化的RoDSE法制备的Pd/Vulcan XC-72R纳米片催化剂对葡萄糖氧化反应的催化性能。粉末X射线分析证实了碳载体材料对Pd结晶度和纳米颗粒大小的影响。利用拉曼光谱和X射线光电子能谱分析了电沉积Pd前后各碳载体的化学结构。用氮气吸附分析法研究了Pd/C催化剂及其碳载体的比表面积和孔隙率。透射电子显微镜图像确定了Pd/CNOS的形态和大小，获得了大分散的纳米粒子，平均直径在35到40 nm之间，较小的粒子在2到10 nm之间。最后，用循环伏安法(CV)和线性扫描伏安法(LSV)比较了Pd/C、Vulcan XC-72R和CNOS在碱性介质中对葡萄糖氧化反应的电催化活性。结果表明，Pd/CNOS在人血中葡萄糖的正常范围5~8 mM范围内具有氧化葡萄糖的能力。
The glucose oxidation reaction, at Pd on unsupported carbon nano-onions (Pd/CNOs), has been studied by using physical and electrochemical characterization techniques. The rotating disk slurry electrode (RoDSE) technique was used for the Pd electrodeposition at the carbon support. The Pd/CNO catalyst was compared with the optimized RoDSE-prepared Pd/Vulcan XC-72R nanoflake catalyst for the glucose oxidation reaction by using different physical and electrochemical characterization techniques. Powder XRD analysis verified the effect of the carbon support material on the Pd crystallinity and size nanoparticles. Raman spectroscopy and X-ray photoelectron spectroscopy were used to understand the chemical structure of each carbon support before and after the Pd electrodeposition. The surface area and porosity of both Pd/C catalysts and their respective carbon substrates were investigated using N2adsorption analysis. Transmission electron microscopy images established the morphology and the sizes of the Pd/CNOs, obtaining a large dispersion of nanoparticles with an average diameter size between 35 and 40 nm, with smaller particles in the range between 2 and 10 nm. Finally, cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were used to compare the electrocatalytic activity of Pd/C, Vulcan XC-72R, and CNOs, for the glucose oxidation reaction in alkaline media. The results indicate that Pd/CNOs has the capacity to oxidize glucose in the normal glucose range between 5 and 8 mM, the normal range of glucose in human blood.