Yumak Tuğrul, Yumak Serap, Karabulut Abdulkerim
Department of Chemistry, Faculty of Arts and Science, Sinop University, Sinop Turkey.
Department of Interdisciplinary Nuclear Energy and Energy Systems, Institute of Graduate Studies, Sinop University, Sinop Turkey.
Turk J Chem. 2021 Oct 19;45(5):1488-1503. doi: 10.3906/kim-2103-14. eCollection 2021.
Platinum (Pt) loaded activated carbons (ACs) were synthesized by the thermal decomposition of platinum (II) acetylacetonate (Pt(acac)) over chemically activated glucose-based biochar. The effect of Pt loading on surface area, pore characteristics, surface chemistry, chemical structure, and surface morphology were determined by various techniques. XPS studies proved the presence of metallic Pt on the AC surface. The graphitization degree of Pt loaded ACs were increased with the loaded Pt amount. The electrochemical performance of the Pt-loaded ACs (Pt@AC) was determined not only by the conventional three-electrode system but also by packaged supercapacitors in CR2032 casings. The capacitive performance of Pt@AC electrodes was investigated via cyclic voltammetry (CV), galvanostatic charge-discharge curves (GCD), and impedance spectroscopy (EIS). It was found that the Pt loading increased the specific capacitance from 51 F/g to 100 F/g. The ESR drop of the packaged cell decreased with the Pt loading due to the fast flow of charge through the conductive pathways. The results showed that the surface chemistry is more dominant than the surface area for determining the capacitive performance of Pt loaded AC-based packaged supercapacitors.
通过在化学活化的葡萄糖基生物炭上热分解乙酰丙酮铂（II）（Pt(acac)）合成了负载铂（Pt）的活性炭（ACs）。采用多种技术测定了Pt负载量对表面积、孔特性、表面化学、化学结构和表面形态的影响。XPS研究证明了AC表面存在金属Pt。负载Pt的ACs的石墨化程度随Pt负载量的增加而提高。负载Pt的ACs（Pt@AC）的电化学性能不仅通过传统的三电极系统测定，还通过CR2032外壳中的封装超级电容器测定。通过循环伏安法（CV）、恒电流充放电曲线（GCD）和阻抗谱（EIS）研究了Pt@AC电极的电容性能。发现Pt负载量将比电容从51 F/g提高到100 F/g。由于电荷通过导电途径快速流动，封装电池的等效串联电阻（ESR）随Pt负载量的增加而降低。结果表明，对于确定基于负载Pt的AC的封装超级电容器的电容性能，表面化学比表面积更具主导作用。
