标题：Facile synthesis of PdSx/C porous nanospheres and their applications for ethanol oxidation reaction
作者：Zhang, Qiang ;Zhang, Fuhua ;Ma, Xuemei ;Zheng, Yiqun ;Hou, Shifeng
作者机构：[Zhang, Qiang ;Zhang, Fuhua ;Ma, Xuemei ;Hou, Shifeng ] School of Chemistry and Chemical Engineering, Shandong University, Jinan; 250100, China;[Zheng 更多
来源：Journal of Power Sources
摘要：We report a facile approach for the synthesis of carbon-supported palladium polysulphide porous nanospheres (PdSx/C) and their applications for ethanol oxidation reaction. Typical synthesis started with generation of palladium/poly (3,4-ethylenedioxythiophene)(Pd/PEDOT) nanospheres, followed by a calcination process at an optimized temperature to form PdSx/C, with an average size of 2.47 ± 0.60 and 50 nm of PdSxnanoparticles and carbon porous nanospheres, respectively. Various techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electrochemical techniques were performed to characterize their morphologies, compositions and structures. In contrary to most Pd-based electrochemical catalysts that could be easily poised with trace sulfur during the catalytic oxidation process, the as-prepared PdSx/C porous nanospheres exhibited high electrocatalytic activities and stabilities for the electrochemical catalytic oxidation of ethanol in alkaline medium. In particular, the forward peak current intensity achieved 162.1 mA mg−1and still maintained at 46.7 mA mg−1even after 1000 cycles. This current work not only offers a novel type of fuel-cell catalyst for ethanol oxidation reaction, but also provides a possible route for solving the sulfur-poisoning problem in catalysis.
© 2016 Elsevier B.V.