Control of surface area and conductivity of niobium-added titanium oxides as durable supports for cathode of polymer electrolyte fuel cells
Control of surface area and conductivity of niobium-added titanium oxides as durable supports for cathode of polymer electrolyte fuel cells
复制标题
DOI：
10.1016/j.matdes.2021.109623
复制
发表时间：
2021-03
影响因子：
8.4
通讯作者：
Yongbing Ma;T. Nagai;Y. Inoue;K. Ikegami;Yoshiyuki Kuroda;K. Matsuzawa;T. Napporn;Yan Liu;S. Mitsushima;A. Ishihara
中科院分区：
文献类型：
--
作者：
Yongbing Ma;T. Nagai;Y. Inoue;K. Ikegami;Yoshiyuki Kuroda;K. Matsuzawa;T. Napporn;Yan Liu;S. Mitsushima;A. Ishihara
铌钛氧化物是一种很有前途的PEFC阴极碳载体替代材料。添加Nb的TiO 2可以作为铂纳米颗粒的载体，以增强酸性条件下的氧还原反应（ORR）活性和耐久性。通过改变Nb的量和热处理条件，制备具有所需表面积（10-130 m2 g-1）和电导率（10 - 7-10 - 2S cm-1）的添加Nb的TiO 2载体。首先，我们进行了一个系统的调查，在纯氢气氛下的铌添加量，热处理温度和时间的变化，以揭示的物理化学因素，支配的表面积和电导率。最后，我们成功地提出了一个程序，以制备具有所需的表面积和电导率的高耐用性铌添加TiO 2载体通过控制铌添加量，热处理温度和时间在氢气下。在5000次加速耐久性试验（ADT）循环后，双层的电荷几乎不变。
Niobium-added titanium oxide is a promising candidate as a substitute carbon support for cathodes of PEFCs. Nb-added TiO2can act as a support for platinum nanoparticles to enhance the oxygen reduction reaction (ORR) activity and durability under acidic conditions. Nb-added TiO2supports with the desired surface area (10–130 m2g−1) and conductivity (10−7–10−2S cm−1) were prepared by changing the amount of Nb and the heat treatment conditions. First, we conducted a systematic investigation with changes in the amount of niobium addition, heat-treatment temperature, and time under a pure hydrogen atmosphere to reveal the physicochemical factors that govern the surface area and conductivity. Finally, we successfully proposed a procedure to prepare highly durable Nb-added TiO2supports with the desired surface area and conductivity by controlling the amount of niobium addition, heat-treatment temperature, and time under hydrogen. The charges of the double layer were almost unchanged after 5000 cycles of an accelerated durability test (ADT).