High specific surface area niobium-doped tin oxide nanoparticles produced in spray flames as catalyst supports in polymer electrolyte fuel cells
High specific surface area niobium-doped tin oxide nanoparticles produced in spray flames as catalyst supports in polymer electrolyte fuel cells
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喷雾火焰中制备的高比表面积铌掺杂氧化锡纳米颗粒作为聚合物电解质燃料电池中的催化剂载体
DOI：
10.1007/s11051-022-05649-3
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发表时间：
2022
影响因子：
2.5
通讯作者：
Ogi Takashi
中科院分区：
文献类型：
--
作者：
Hirano Tomoyuki;Tsuboi Takama;Cao Kiet Le Anh;Tanabe Eishi;Ogi Takashi
载铂碳通常用于聚合物电解质燃料电池（PEFC）;然而，已知其在高电位下腐蚀或降解，这导致电池性能差。掺铌氧化锡（Nb-SnO 2; NTO）纳米颗粒是碳的替代材料，因为它们作为燃料电池中的催化剂载体具有高耐久性和良好的电池性能。本文介绍了用喷雾火焰法制备高比表面积NTO纳米粒子的方法。评价了纳米粒子的颗粒特性和PEFC性能。使用具有双流体喷嘴的喷雾燃烧，其中原料物种被快速气化以形成精细的纳米颗粒。喷雾火焰合成在4.87 kJ/g气体的燃烧焓密度下操作。这使得能够在最小条件下形成均匀的纳米颗粒并抑制颗粒生长。火焰法制备的NTO纳米粒子的一次粒径和比表面积分别为8.77 nm和87.04 m2/g。Rietveld分析揭示了NTO纳米颗粒的详细晶体结构。此外，将Pt负载在NTO纳米颗粒上，并使用膜电极组件评估所得材料的电池性能。本研究的结果可用于改善火焰制备的NTO纳米颗粒的特性，以适应燃料电池应用的需要。
Platinum-loaded carbon is commonly used in polymer electrolyte fuel cells (PEFCs); however, it is known to corrode or degrade under high potentials, which results in poor cell performance. Niobium-doped tin oxide (Nb-SnO2; NTO) nanoparticles are alternative materials to carbon because of their high durability and good cell performance as catalyst support in fuel cells. Here, we introduce the preparation of NTO nanoparticles with high specific surface area by spray flames. The particle characteristics and PEFC performances of the nanoparticles were evaluated. Spray combustion with a two-fluid nozzle was used where the raw material species were rapidly gasified to form fine nanoparticles. The spray flame synthesis was operated at a combustion enthalpy density of 4.87 kJ/ggas. This enabled homogeneous nanoparticle formation and suppressed particle growth under a minimal condition. The flame-made NTO nanoparticles showed a primary particle size and specific surface area of ~ 8.77 nm and 87.04 m2/g, respectively. Rietveld analysis revealed a detailed crystal structure of the NTO nanoparticles. In addition, Pt was loaded on the NTO nanoparticles and the cell performance of the resulting material was assessed using a membrane electrode assembly. The results of this study can be used to improve the features of flame-made NTO nanoparticles in order to suit the needs of a fuel cell application.