作者
Shicheng Xu, Yongmin Kim, Joonsuk Park, Drew Higgins, Shih-Jia Shen, Peter Schindler, Dickson Thian, J Provine, Jan Torgersen, Tanja Graf, Thomas D Schladt, Marat Orazov, Bernard Haochih Liu, Thomas F Jaramillo, Fritz B Prinz
发表日期
2018/8
期刊
Nature catalysis
卷号
1
期号
8
页码范围
624-630
出版商
Nature Publishing Group UK
简介
Controlling the morphology of noble metal nanoparticles during surface depositions is strongly influenced by precursor–substrate and precursor–deposit interactions. Depositions can be improved through a variety of means, including tailoring the surface energy of a substrate to improve precursor wettability, or by modifying the surface energy of the deposits themselves. Here, we show that carbon monoxide can be used as a passivation gas during atomic layer deposition to modify the surface energy of already deposited Pt nanoparticles to assist direct deposition onto a carbon catalyst support. The passivation process promotes two-dimensional growth leading to Pt nanoparticles with suppressed thicknesses and a more than 40% improvement in Pt surface-to-volume ratio. This approach to synthesizing nanoparticulate Pt/C catalysts achieved high Pt mass activities for the oxygen reduction reaction, along with …
学术搜索中的文章
S Xu, Y Kim, J Park, D Higgins, SJ Shen, P Schindler… - Nature catalysis, 2018