Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.
Department of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, China.
Sci Rep. 2017 Aug 1;7(1):7017. doi: 10.1038/s41598-017-07717-4.
This work reports the oxygen reduction reaction (ORR) kinetics of metal nanoparticle catalysts between 500 and 600 °C at low oxygen partial pressures. Ex situ and in situ TEM measurements demonstrate catalyzed nanowire growth initially follows linear kinetics; characteristic of being ORR rate limited. The ORR rates of Ag, Au, Cu, Ni, Pd, Rh and Pt measured at 600 °C form a volcano plot versus relative oxidation potential. Cu nanoparticles produce the maximum ORR rate under these conditions.
这项工作报道了金属纳米粒子催化剂在 500 至 600°C 之间、低氧分压下的氧还原反应（ORR）动力学。 原位和原位 TEM 测量表明，催化纳米线生长最初遵循线性动力学； 这是 ORR 速率受限的特征。 在 600°C 下测量的 Ag、Au、Cu、Ni、Pd、Rh 和 Pt 的 ORR 速率相对于相对氧化电势形成火山图。 在这些条件下，Cu 纳米颗粒产生最大的 ORR 速率。
