Milikić Jadranka, Balčiūnaitė Aldona, Sukackienė Zita, Mladenović Dušan, Santos Diogo M F, Tamašauskaitė-Tamašiūnaitė Loreta, Šljukić Biljana
Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia.
Department of Catalysis, Center for Physical Sciences and Technology, Saulėtekio ave. 3, Vilnius LT-10257, Lithuania.
Materials (Basel). 2020 Dec 28;14(1):92. doi: 10.3390/ma14010092.
Bimetallic cobalt (Co)-based coatings were prepared by a facile, fast, and low-cost electroless deposition on a copper substrate (CoFe, CoMn, CoMo) and characterized by scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray diffraction analysis. Prepared coatings were thoroughly examined for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution (1 M potassium hydroxide, KOH) and their activity compared to that of Co and Ni coatings. All five coatings showed activity for both reactions, where CoMo and Co showed the highest activity for HER and OER, respectively. Namely, the highest HER current density was recorded at CoMo coating with low overpotential (61 mV) to reach a current density of 10 mA·cm. The highest OER current density was recorded at Co coating with a low Tafel slope of 60 mV·dec. Furthermore, these coatings proved to be stable under HER and OER polarization conditions.
通过一种简便、快速且低成本的化学镀方法在铜基底（CoFe、CoMn、CoMo）上制备了双金属钴（Co）基涂层，并通过扫描电子显微镜结合能量色散X射线光谱和X射线衍射分析对其进行了表征。对制备的涂层在碱性溶液（1 M氢氧化钾，KOH）中进行析氢反应（HER）和析氧反应（OER）的全面研究，并将它们与Co和Ni涂层的活性进行比较。所有五种涂层在这两种反应中均表现出活性，其中CoMo和Co分别在HER和OER中表现出最高活性。具体而言，在CoMo涂层上记录到最高的HER电流密度，其过电位较低（61 mV），可达到10 mA·cm的电流密度。在Co涂层上记录到最高的OER电流密度，其塔菲尔斜率为60 mV·dec。此外，这些涂层在HER和OER极化条件下被证明是稳定的。
