Zhang Xiaofang, Shan Aixian, Duan Sibin, Zhao Haofei, Wang Rongming, Lau Woon-Ming
Beijing Advanced Innovation Center for Materials Genome Engineering, Center for Green Innovation, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing Beijing 100083 China
RSC Adv. 2019 Dec 10;9(70):40811-40818. doi: 10.1039/c9ra07535f. eCollection 2019 Dec 9.
Core/shell nanoparticles (NPs) of Au@CoP, each comprising a Au core with a CoP shell, were prepared, and shown to efficiently catalyze the oxygen evolution reaction (OER). In particular, Au@CoP has a small overpotential of 321 mV at 10 mA cm in 1 M KOH aqueous solution at room temperature, which is about 95 mV less than pure CoP. More importantly, the Tafel slope of Au@CoP, at 57 mV dec, is 44 mV dec lower than that of CoP. Hence, Au@CoP outperforms CoP drastically in practical production when a high current density is required.
制备了核壳结构的Au@CoP纳米颗粒（NPs），每个颗粒都包含一个Au核和一个CoP壳，并证明其能有效催化析氧反应（OER）。特别是，在室温下的1 M KOH水溶液中，Au@CoP在10 mA cm时的过电位小至321 mV，比纯CoP低约95 mV。更重要的是，Au@CoP的塔菲尔斜率为57 mV dec，比CoP低44 mV dec。因此，在需要高电流密度的实际生产中，Au@CoP的性能远优于CoP。
