Pt nanoparticles supported on nitrogen-doped porous carbon as efficient oxygen reduction catalysts synthesized via a simple alcohol reduction method
Pt nanoparticles supported on nitrogen-doped porous carbon as efficient oxygen reduction catalysts synthesized via a simple alcohol reduction method
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DOI：
10.1007/s42452-021-04343-8
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发表时间：
2021-02
影响因子：
2.6
通讯作者：
Naoki Tachibana;Yasuyuki Yukawa;K. Morikawa;M. Kawaguchi;K. Shimanoe
中科院分区：
文献类型：
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作者：
Naoki Tachibana;Yasuyuki Yukawa;K. Morikawa;M. Kawaguchi;K. Shimanoe
摘要研究了氮掺杂多孔碳（NPC）负载pt纳米颗粒作为氧还原反应（ORR）的高活性催化剂和合适的多孔载体结构。采用简单醇还原法制备了负载量为8.8 ~ 35.4 wt.%的Pt/NPC催化剂，其平均尺寸为1.90 ~ 2.99 nm，分布均匀。x射线光电子能谱测量表明，Pt纳米粒子与NPC载体之间存在强相互作用。27.4% Pt/NPC在旋转圆盘电极体系中对ORR表现出较高的催化活性，也有效地应用于气体扩散电极（GDE）。用Pt/NPC制备的GDE具有良好的孔隙网络，在高电流密度下表现出优异的性能。Pt/NPC和Pt/炭黑催化剂在ORR上的比活性与Pt吸附OH还原的峰值电位相关，其峰值电位与颗粒大小和载体有关。图形抽象
AbstractPt nanoparticles supported on nitrogen-doped porous carbon (NPC) were investigated as both a highly active catalyst for the oxygen reduction reaction (ORR) and a suitable porous support structure. Pt/NPC catalysts with loadings of 8.8–35.4 wt.% were prepared via a simple alcohol reduction method and exhibited homogeneously dispersed Pt nanoparticles with a small mean size ranging from 1.90 to 2.99 nm. X-ray photoelectron spectroscopy measurement suggested the presence of strong interactions between the Pt nanoparticles and NPC support. 27.4% Pt/NPC demonstrated high catalytic activity for the ORR in a rotating disk electrode system and was also effectively applied to a gas diffusion electrode (GDE). A GDE fabricated using the Pt/NPC with a fine pore network exhibited excellent performance, especially at high current densities. Specific activity of Pt/NPC and Pt/carbon black catalysts for the ORR correlated with the peak potential of adsorbed OH reduction on Pt, which was dependent on the particle size and support.Graphic abstract