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Enhancing Oxygen Storage Capability and Catalytic Activity of Lanthanum Oxysulfide (La 2 O 2 S) Nanocatalysts by Sodium and Iron/Sodium Doping
Author(s) -
Tan Shuai,
Li Dongmei
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701117
Subject(s) - nanomaterial based catalyst , lanthanum , catalysis , inorganic chemistry , oxygen , doping , chemistry , sodium , redox , materials science , organic chemistry , optoelectronics
Abstract We report the enhanced oxygen storage capability (OSC) and activity of lanthanum oxysulfide (La 2 O 2 S) nanocatalysts, derived from the introduction of oxygen vacancies by sodium (Na) doping. Additionally, iron/sodium (Fe/Na) co‐doping further increased the OSC by three times, with an additional 15–20 % increase in CO conversion for the water‐gas shift (WGS) reaction, compared with the best CO conversion rate among Na‐doped La 2 O 2 S catalysts. The significant enhancement in OSC and activity after Fe/Na co‐doping may be attributed to the presence of Fe 2+ ↔Fe 3+ redox couple. Finally, the Fe/Na co‐doped nanocatalyst alleviated the high temperature requirement of La 2 O 2 S catalysts without compromising stability.