Bai Hu, Zhang Yanhong, Chu Jiaming, Zhou Qi, Lan Haiyang, Zhou Juan
School of Energy and Power Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Jiangsu Province 210094, China.
ACS Appl Mater Interfaces. 2023 Aug 16;15(32):38581-38591. doi: 10.1021/acsami.3c07638. Epub 2023 Aug 3.
Proton-conducting solid oxide electrolysis cell (H-SOEC), as a hydrogen production device using proton conductor oxides as an electrolyte, has gained attention due to its various advantages of being more suitable for operating conditions at intermediate and low temperatures. However, its commercialization urgently needs to address the issue of insufficient catalytic activity of the oxygen electrode at lower temperatures. In this work, PrBaSrCoFeO-BaZrCeYYbO (PBSCF-BZCYYb) series composite materials (denoted as PBSCF-BZCYYb46, PBSCF- BZCYYb55, and PBSCF-BZCYYb64 based on the mass ratios of PBSCF and BZCYYb as 4:6, 5:5, and 6:4, respectively) are prepared and applied as oxygen electrodes for H-SOECs. The H-SOECs with the structure of PBSCF-BZCYYb|BZCYYb|NiO-BZCYYb (active layer)|NiO-BZCYYb (support layer) are prepared and recorded as Cell 1, Cell 2, and Cell 3 with PBSCF-BZCYYb46, PBSCF-BZCYYb55, and PBSCF-BZCYYb64 as oxygen electrodes. The H-SOECs exhibit electrolysis current densities of 669.00, 743.80, and 503.30 mA cm under 1.3 V at 650 °C, respectively. The cells also show considerable stability in the constant voltage electrolysis of 179.5, 152.8, and 83.0 h, respectively. Through the comparison of various electrochemical properties, PBSCF-BZCYYb55 is considered the most promising oxygen electrode material in this work.
质子传导型固体氧化物电解池（H-SOEC）作为一种以质子导体氧化物为电解质的制氢装置，因其更适合中低温运行条件的诸多优点而受到关注。然而，其商业化迫切需要解决低温下氧电极催化活性不足的问题。在本工作中，制备了PrBaSrCoFeO-BaZrCeYYbO（PBSCF-BZCYYb）系列复合材料（根据PBSCF与BZCYYb的质量比分别为4:6、5:5和6:4，分别记为PBSCF-BZCYYb46、PBSCF-BZCYYb55和PBSCF-BZCYYb64），并将其用作H-SOEC的氧电极。制备了具有PBSCF-BZCYYb|BZCYYb|NiO-BZCYYb（活性层）|NiO-BZCYYb（支撑层）结构的H-SOEC，分别以PBSCF-BZCYYb46、PBSCF-BZCYYb55和PBSCF-BZCYYb64作为氧电极，记为电池1、电池2和电池3。在650℃、1.3V下，这些H-SOEC的电解电流密度分别为669.00、743.80和503.30mA/cm²。这些电池在恒压电解中也分别表现出相当的稳定性，时长为179.5、152.8和83.0小时。通过对各种电化学性能的比较，PBSCF-BZCYYb55被认为是本工作中最有前景的氧电极材料。
