CoFe-B-P纳米颗粒的制备及其电化学析氧性能研究

CoFe-B-P Nanoparticles: Preparation and Electrochemical Oxygen Evolution Performance

本工作通过溶剂热法制备了CoFe-B-P纳米颗粒,并考察其电化学析氧性能.所制备催化剂的形貌结构和组分通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、X射线光电子能谱(XPS)和电感耦合等离子体发射光谱(ICP-OES)等手段进行表征.研究发现,当Co/Fe的摩尔比为4∶1和NaH_(2)PO_(2)·H_(2)O的加入量为2.0 mmol时,所制备Co_(4)Fe_(1)-B-P催化剂展现了最优异的催化OER性能,在电流密度为10 mAcm^(−2)时的过电位为285 mV,较小的塔菲尔斜率(52.70 mV/dec),并且在1.0 M KOH电解液中连续测试20 h后仍具有优异的稳定性.所制备催化剂OER活性的提高主要归因于过渡金属与非金属之间的协同作用.

In the present work,CoFe-B-P nanoparticles were prepared by solvothermal method and investi⁃gated their oxygen evolution reaction(OER)performance were investigated.The morphologic structures and composi⁃tion of the resultant samples were characterized by SEM,TEM,XRD,XPS,and ICP-OES.It was found when the mo⁃lar ratio of Co and Fe is 4,and the addition amount of NaH_(2)PO_(2)·H_(2)O is 2.0 mmol,the resultant Co_(4)Fe_(1)-B-P catalyst exhibited the best OER performance with a low over-potential of 285 mV at a current density of 10 mA cm^(−2) and a small Tafel slope of 52.70 mV/dec,as well as excellent long-term stability in 1.0 M KOH after continue testing 20 h.The improved OER activity benefits from the electronic interaction between transition metal and nonmetal.