Preparation of small size SiC and study on its performance in electrochemical hydrogen evolution
BAI Gai-ling1,2, TONG Xi-li2
1. Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China; 2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry of Chinese Academy of Sciences, Taiyuan 030001, China
Abstract: SiC nano-materials are heated and etched in concentrated acid to obtain small size SiC particles.Pt/SiC composites are prepared by electrodepositing Pt on SiC nano-materials.Composition,structure and electrochemical properties of the composites are characterized by X-ray diffraction,transmission electron microscopy and electrochemical measurements.The results show that SiC-4 particles have a diameter around several nanometers and a good autocatalytic hydrogen evolution performance.Pt/SiC-4 has excellent performance of hydrogen evolution reaction (HER),with an over-potential of 75 mV at a current density of 10 mA·cm-2,and an over-potential of 212 mV at 100 mA cm-2.Tafel value of Pt/SiC-4 is 37.57 mV·dec-1,and the double-layer capacitance value is 1.56 mF·cm-2.
白改玲, 童希立. 小尺寸SiC的制备及其电化学析氢性能研究[J]. 现代化工, 2020, 40(6): 95-97.
BAI Gai-ling, TONG Xi-li. Preparation of small size SiC and study on its performance in electrochemical hydrogen evolution. Modern Chemical Industry, 2020, 40(6): 95-97.
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