Song Yufei, Wang Wei, Ge Lei, Xu Xiaomin, Zhang Zhenbao, Julião Paulo Sérgio Barros, Zhou Wei, Shao Zongping
State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University No. 5 Xin Mofan Road Nanjing 210009 P. R. China.
Department of Chemical Engineering Curtin University Perth Western Australia 6845 Australia.
Adv Sci (Weinh). 2017 Sep 15;4(11):1700337. doi: 10.1002/advs.201700337. eCollection 2017 Nov.
Solid oxide fuel cells (SOFCs), which can directly convert chemical energy stored in fuels into electric power, represent a useful technology for a more sustainable future. They are particularly attractive given that they can be easily integrated into the currently available fossil fuel infrastructure to realize an ideal clean energy system. However, the widespread use of the SOFC technology is hindered by sulfur poisoning at the anode caused by the sulfur impurities in fossil fuels. Therefore, improving the sulfur tolerance of the anode is critical for developing SOFCs for use with fossil fuels. Herein, a novel, highly active, sulfur-tolerant anode for intermediate-temperature SOFCs is prepared via a facile impregnation and limited reaction protocol. During synthesis, Ni nanoparticles, water-storable BaZrCeYO (BZCY) perovskite, and amorphous BaO are formed in situ and deposited on the surface of a SmCeO (SDC) scaffold. More specifically, a porous SDC scaffold is impregnated with a well-designed proton-conducting perovskite oxide liquid precursor with the nominal composition of Ba(ZrCeY)NiO (BZCYN), calcined and reduced in hydrogen. The as-synthesized hierarchical architecture exhibits high H electro-oxidation activity, excellent operational stability, superior sulfur tolerance, and good thermal cyclability. This work demonstrates the potential of combining nanocatalysts and water-storable materials in advanced electrocatalysts for SOFCs.
固体氧化物燃料电池（SOFC）能够将储存于燃料中的化学能直接转化为电能，是实现更可持续未来的一项实用技术。鉴于其能够轻松整合到现有的化石燃料基础设施中以实现理想的清洁能源系统，因而特别具有吸引力。然而，化石燃料中的硫杂质会导致阳极硫中毒，这阻碍了SOFC技术的广泛应用。因此，提高阳极的耐硫性对于开发用于化石燃料的SOFC至关重要。在此，通过简便的浸渍和有限反应方案制备了一种用于中温SOFC的新型、高活性、耐硫阳极。在合成过程中，原位形成镍纳米颗粒、可储存水的BaZrCeYO（BZCY）钙钛矿和无定形BaO，并沉积在SmCeO（SDC）支架表面。更具体地说，用精心设计的标称组成为Ba(ZrCeY)NiO（BZCYN）的质子传导钙钛矿氧化物液体前驱体浸渍多孔SDC支架，然后在氢气中煅烧并还原。所合成的分级结构表现出高的氢电氧化活性、优异的运行稳定性、卓越的耐硫性和良好的热循环性。这项工作展示了在用于SOFC的先进电催化剂中结合纳米催化剂和可储存水材料的潜力。
