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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.
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Tan et al. (2017) studied this question.
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