Kuyuldar Esra, Polat Su Selda, Burhan Hakan, Mustafov Sibel Demiroglu, Iyidogan Aysegul, Sen Fatih
Sen Research Group, Department of Biochemistry, Faculty of Arts and Science, Dumlupınar University, Evliya Çelebi Campus, 43100, Kütahya, Turkey.
Department of Chemistry, Faculty of Science and Arts, Gaziantep University, Gaziantep, Turkey.
Sci Rep. 2020 May 8;10(1):7811. doi: 10.1038/s41598-020-64885-6.
Addressed herein, thiourea functionalized graphene oxide-based PtRu nanocatalysts (PtRu@T/GO) has been synthesized and characterized by several techniques and performed for methanol oxidation reactions as novel catalysts. In this study, graphene oxide (GO) was functionalized with thiourea (T/GO) in order to obtain monothiol functionalized graphene and increase the stability and activity of the nanocatalysts. Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), TEM (transmission electron microscopy) and high-resolution transmission electron microscopy (HR-TEM) were used for characterization of the prepared nanocatalysts. The results obtained from these techniques showed that the prepared nanocatalysts were in a highly crystalline form, well dispersed on T/GO, very small in size and colloidally stable. The average size of the synthesized nanocatalysts determined by TEM analysis was found to be 3.86 ± 0.59 nm. With HR-TEM analysis, the atomic lattice fringes of the nanocatalysts were calculated to be 0.23 nm. After the full characterization of the prepared nanocatalysts, they were tried for the methanol oxidation reaction (MOR) and it was observed that 97.3% of the initial performance was maintained even after 1000 cycles while exhibiting great catalytic activity and stability with the help of T/GO. Thus, the arranged nanocatalysts displayed great heterogeneous catalyst characteristics for the methanol oxidation response.
本文报道了通过多种技术合成并表征了基于硫脲功能化氧化石墨烯的PtRu纳米催化剂（PtRu@T/GO），并将其作为新型催化剂用于甲醇氧化反应。在本研究中，氧化石墨烯（GO）用硫脲（T/GO）进行功能化，以获得单硫醇功能化的石墨烯，并提高纳米催化剂的稳定性和活性。拉曼光谱、X射线光电子能谱（XPS）、X射线衍射（XRD）、透射电子显微镜（TEM）和高分辨率透射电子显微镜（HR-TEM）用于表征所制备的纳米催化剂。这些技术获得的结果表明，所制备的纳米催化剂呈高度结晶形式，很好地分散在T/GO上，尺寸非常小且胶体稳定。通过TEM分析确定的合成纳米催化剂的平均尺寸为3.86±0.59nm。通过HR-TEM分析，计算出纳米催化剂的原子晶格条纹为0.23nm。在所制备的纳米催化剂得到充分表征后，对其进行甲醇氧化反应（MOR）测试，结果发现，即使在1000次循环后，仍保持97.3%的初始性能，同时在T/GO的帮助下表现出很高的催化活性和稳定性。因此，所制备的纳米催化剂对甲醇氧化反应显示出优异的多相催化剂特性。
