High jolt-resistance monolithic CuO-CeO2/AlOOH/Al-fiber catalyst for CO-PROX: Influence of AlOOH/Al-fiber calcination on CueCe interaction

作者：Wei, Yan; Gao, Ya; Xu, Xinyi; Si, Jiaqi; Sun, Weidong; Zhao, Guofeng^*; Liu, Ye; Lu, Yong^*

来源：International Journal of Hydrogen Energy, 2022, 47(26): 13030-13043.

DOI：10.1016/j.ijhydene.2022.02.068

• Structured catalyst
• CO preferential oxidation
• Al-iber
• AlOOH nanosheets
• Hydroxyl
• Fuel cell

Micro-reactors for the preferential oxidation of CO in H-2-rich stream (CO-PROX) are attractive for PEMFCs employed in portable electronic devices and automobiles, but the jolt is inevitable, which makes micro-reactors necessitate high jolt resistance. The monolithic structured catalyst could effectively resolve these problems. Herein, we employed the thin-felt monolithic Al-fiber substrate to fabricate the Cu-CeO2/AlOOH/Al-fiber catalyst for the CO-PROX reaction. This catalyst was prepared via first growing AlOOH nanosheets onto the Al-fiber surface by steam oxidation method, followed by depositing CuO-CeO2 onto the AlOOH/Al-fiber support. The preferred catalyst delivered 100% CO conversion and 81% O-2 selectivity at 140 degrees C with a gas hourly space velocity of 12,000 mL g(-1) h(-1), and particularly, performed stably for 120 h at the changeable temperatures of 120-160 degrees C. This work provides a strategy to tailor a qualified monolithic catalyst that couples the promising jolt resistance and catalytic performance at 120-160 degrees C.

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