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Citation: Botao Qiao, Jian Lin, Aiqin Wang, Yang Chen, Tao Zhang, Jingyue Liu. Highly active Au₁/Co₃O₄ single-atom catalyst for CO oxidation at room temperature[J]. Chinese Journal of Catalysis, ;2015, 36(9): 1505-1511. doi: 10.1016/S1872-2067(15)60889-0 shu

Highly active Au₁/Co₃O₄ single-atom catalyst for CO oxidation at room temperature

Botao Qiao ^a,b ,
Jian Lin ^b ,
Aiqin Wang ^b ,
Yang Chen ^b ,
Tao Zhang ^b,, ,
Jingyue Liu ^a,b,,

1.
a Department of Physics, Arizona State University, Tempe, Arizona, 85287, USA;

Corresponding author: Tao Zhang, Jingyue Liu,
Received Date: 1 April 2015
Available Online: 29 April 2015
Fund Project: 国家自然科学基金(21303184) (21303184) 中国科学院重点研究计划(KGZD-EW-T05). (KGZD-EW-T05)

CO oxidation is of great importance in both fundamental studies and practical applications. Oxide-supported noble metal catalysts are well known to be excellent CO oxidation catalysts. However, the high cost and limited supply of these noble metals pose significant challenges for sustainable applications. Maximizing the atom efficiency of supported noble metal catalysts is therefore highly desirable. In this work, a Co₃O₄ supported Au single-atom catalyst with very low Au (0.05 wt%) loading has been developed. This catalyst showed extremely high activity for CO oxidation and exhibited total conversion of CO at room temperature. The high activity originates from the isolated Au atoms distributed on the Co₃O₄ nanocrystallites, although the exact catalytic mechanism is still under investigation. The catalyst deactivation observed during the CO oxidation was attributed to the accumulation of CO₂ rather than sintering of the single Au atoms. This extremely low loading of Au coupled to high activity is critical to reducing the cost of noble metal catalysts and making them more practical and attractive.
- Single-atom catalysis,
- Noble metal,
- Gold,
- Carbon monoxide,
- Cobalt oxide,
- Low temperature
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Highly active Au₁/Co₃O₄ single-atom catalyst for CO oxidation at room temperature