Extending the limits of Pt/C catalysts with passivation-gas-incorporated atomic layer deposition

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

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

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 excellent stability likely facilitated by strong catalyst–support interactions afforded by this synthetic technique.

原文English
頁(從 - 到)624-630
頁數7
期刊Nature Catalysis
1
發行號8
DOIs
出版狀態Published - 2018 八月 1

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Bioengineering
  • Biochemistry
  • Process Chemistry and Technology

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