Open AccessOptimizing the catalytic activity of flame‐spray‐pyrolyzed Pt/Fe 2 O 3 catalyst toward CO oxidation: Effect of fluorination and reduction
Author(s) -
Sarkodie Bismark,
Hu Yanjie,
Bi Wei,
Jiang Jiechao,
Li Chunzhong
Publication year - 2021
Publication title -
nano select
Language(s) - English
Resource type - Journals
ISSN - 2688-4011
DOI - 10.1002/nano.202000211
Subject(s) - catalysis , oxygen , dispersion (optics) , chemistry , pyrolysis , thermal spraying , thermal stability , fluorine , inorganic chemistry , chemical engineering , organic chemistry , physics , optics , engineering , coating
Abstract Comprehending the characteristics of nanocatalyst and the effect of pretreatment on its catalytic performance is of great importance in the field of catalysis. The present study probes the catalytic performance of fluorinated Pt/Fe 2 O 3 prepared by one step flame spray pyrolysis and the effect of pretreatment in CO oxidation. The characterization reveals that in‐situ fluorination of Pt/Fe 2 O 3 in high temperature flame process contributed to low temperature reducibility, improved dispersion abundant surface oxygen vacancies and reactive hydroxyl groups. It is noteworthy that the optimal catalytic performance was attained after reduction of fluorinated Pt/Fe 2 O 3 in 10% H 2 at 200 °C (F‐Pt/Fe‐200). The abundant surface hydroxyl group and oxygen vacancies facilitated faster reaction. The in‐situ DRIFTS reveals the consumption of hydroxyl group in F‐Pt/Fe‐200 which contributed to the amelioration of CO oxidation. Aside the better stability of F‐Pt/Fe‐200, complete conversion of 2% and 4% CO was achieved at 150 °C and 200 °C, respectively, indicating the feasible utilization of flame‐made fluorinated Pt/Fe 2 O 3 . Conclusively, the fluorine formed a strong bond with Pt, which ameliorated oxidative and thermal stability.