Nacys Antanas, Simkunaitė Dijana, Balciunaite Aldona, Zabielaite Ausrine, Upskuviene Daina, Levinas Ramunas, Jasulaitiene Vitalija, Kovalevskij Vitalij, Simkunaite-Stanyniene Birute, Tamasauskaite-Tamasiunaite Loreta, Norkus Eugenijus
Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, Lithuania.
Materials (Basel). 2023 Sep 27;16(19):6427. doi: 10.3390/ma16196427.
A Pt-coated Ni layer supported on a Ni foam catalyst (denoted PtNi/Ni) was investigated for the electro-oxidation of the formic acid (FAO) in acidic media. The prepared PtNi/Ni catalyst was studied as a function of the formic acid (FA) concentration at bare Pt and PtNi/Ni catalysts. The catalytic activity of the PtNi/Ni catalysts, studied on the basis of the ratio of the direct and indirect current peaks ()/() for the FAO reaction, showed values approximately 10 times higher compared to those on bare Pt, particularly at low FA concentrations, reflecting the superiority of the former catalysts for the electro-oxidation of FA to CO. Ni foams provide a large surface area for the FAO, while synergistic effects between Pt nanoparticles and Ni-oxy species layer on Ni foams contribute significantly to the enhanced electro-oxidation of FA via the direct pathway, making it almost equal to the indirect pathway, particularly at low FA concentrations.
研究了负载在泡沫镍催化剂上的铂包覆镍层（表示为PtNi/Ni）用于酸性介质中甲酸电氧化（FAO）的性能。在裸铂和PtNi/Ni催化剂上，研究了制备的PtNi/Ni催化剂随甲酸（FA）浓度的变化情况。基于FAO反应的直流峰与交流峰之比（(i_d/i_f)）研究的PtNi/Ni催化剂的催化活性，与裸铂催化剂相比，其值高出约10倍，特别是在低FA浓度下，这反映了前一种催化剂在将FA电氧化为CO方面的优越性。泡沫镍为FAO提供了较大的表面积，而铂纳米颗粒与泡沫镍上的镍氧物种层之间的协同效应通过直接途径对FA增强的电氧化有显著贡献，使其几乎与间接途径相等，特别是在低FA浓度下。
