CoFe-B-P Nanoparticles:Preparation and Electrochemical Oxygen Evolution Performance
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摘要:
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 NaH2PO2·H2O 的加入量为 2.0 mmol 时,所制备 Co4Fe1-B-P 催化剂展现了最优异的催化 OER 性能,在电流密度为 10 mA cm?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.
Abstract:
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 NaH2PO2·H2O is 2.0 mmol,the resultant Co4Fe1-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.