Gabrovska Margarita, Nikolova Dimitrinka, Kolev Hristo, Karashanova Daniela, Tzvetkov Peter, Burdin Blagoy, Mladenova Emiliya, Vladikova Daria, Tabakova Tatyana
Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
Nanomaterials (Basel). 2023 May 31;13(11):1781. doi: 10.3390/nano13111781.
Yttrium-doped barium cerate (BCY15) was used as ceramic matrix to obtain Ni/BCY15 anode cermet for application in proton-conducting solid oxide fuel cells (pSOFC). Ni/BCY15 cermets were prepared in two different types of medium, namely deionized water (W) and anhydrous ethylene glycol (EG) using wet chemical synthesis by hydrazine. An in-depth analysis of anodic nickel catalyst was made aiming to elucidate the effect of anode tablets' preparation by high temperature treatment on the resistance of metallic Ni in Ni/BCY15-W and Ni/BCY15-EG anode catalysts. On purpose reoxidation upon high-temperature treatment (1100 °C for 1 h) in air ambience was accomplished. Detailed characterization of reoxidized Ni/BCY15-W-1100 and Ni/BCY15-EG-1100 anode catalysts by means of surface and bulk analysis was performed. XPS, HRTEM, TPR, and impedance spectroscopy measurements experimentally confirmed the presence of residual metallic Ni in the anode catalyst prepared in ethylene glycol medium. These findings were evidence of strong metal Ni network resistance to oxidation in anodic Ni/BCY15-EG. Enhanced resistance of the metal Ni phase contributed to a new microstructure of the Ni/BCY15-EG-1100 anode cermet getting more stable to changes that cause degradation during operation.
钇掺杂铈酸钡（BCY15）被用作陶瓷基体，以制备用于质子传导固体氧化物燃料电池（pSOFC）的Ni/BCY15阳极金属陶瓷。采用湿化学合成法，通过肼在两种不同的介质中制备了Ni/BCY15金属陶瓷，即去离子水（W）和无水乙二醇（EG）。对阳极镍催化剂进行了深入分析，旨在阐明高温处理制备阳极片对Ni/BCY15-W和Ni/BCY15-EG阳极催化剂中金属Ni电阻的影响。在空气环境中进行了高温处理（1100℃，1小时）后的有意再氧化。通过表面和体相分析对再氧化后的Ni/BCY15-W-1100和Ni/BCY15-EG-1100阳极催化剂进行了详细表征。XPS、HRTEM、TPR和阻抗谱测量实验证实了在乙二醇介质中制备的阳极催化剂中存在残余金属Ni。这些发现证明了阳极Ni/BCY15-EG中金属Ni网络具有很强的抗氧化性。金属Ni相电阻的增强有助于Ni/BCY15-EG-1100阳极金属陶瓷形成新的微观结构，使其在运行过程中对导致降解的变化更加稳定。
