磷化钴/多壁碳纳米管的制备及电催化性能研究

不断增加的能源需求和环境污染危机推动了替代高效能源转换和储存技术的广泛研究。电催化分解水具有潜在的应用前景,其可以利用电能获得清洁无污染的氢能。鉴于此,本论文通过不同浓度KOH浸泡超声的多壁碳纳米管(MWNTS)作为基底,CoCl2溶液为反应液,运用水热与固体磷化法得到负载有CoP的多壁碳纳米管材料。通过X-射线粉末衍射仪(XRD)、冷场发射扫描电子显微镜(SEM)、比表面及孔隙度分析(BET)对复合材料的晶型、形貌和比表面积进行了分析;通过电化学工作站对其相关电学性能进行了测试。实验结果表明在浓度为1 mol·L^-1 KOH浸泡的碳纳米管吸附的CoP含量最高(CoP-MWNTS-1.0),且电催化性能最佳,其在10 mA·cm^2的电流密度下过电势为196 mV,Tafel斜率为231.07 mV/dec。

Synthesis and investigation of electrocatalytic properties for CoP-C nanotubes

The increasing energy demand and environmental pollution crisis have promoted the extensive research of alternative efficient energy conversion and storage technology.Electrocatalytic decomposition of water has a potential application prospect,which converts the electric energy of renewable energy into hydrogen energy.The large-scale application of renewable energy is realized.In view of this,here,ultrasonic multi-walled carbon nanotubes(MWNTS)were used as the substrate and CoCl2 solution was used as the reaction solution.The multi-wall carbon nanotubes loaded with CoP were obtained by hydrothermal and solid phosphating methods.X-ray powder diffractometer(XRD),cold-field emission scanning electron microscope(SEM)and BET were used to analyze the crystalline structure,morphology of the composites and the surface area.The related electrical properties were tested by electrochemical workstation.The experimental results show that the content of CoP adsorbed by the carbon nanotube immersed in 1 mol·L^-1 KOH is the highest(that is,CoP-MWNTS-1.0),and its electrocatalytic performance is also good with theoverpotential of 196 mV at the current density of 10 mA·cm^2 and Tafel slope of 231.07 mV/dec.