TITLE:
Hydroxyl Enhanced Structured Pt/Nix/a-AlOOH Catalyst for Formaldehyde Oxidation at Room Temperature
AUTHORS:
Shoudian Zhao, Qi Zhang, Guobing Zhao, Yuhua Zhang
KEYWORDS:
Structured Catalyst, AlOOH, Formaldehyde, NiOOH
JOURNAL NAME:
Modern Research in Catalysis,
Vol.9 No.2,
April
13,
2020
ABSTRACT: Ni promoted structured plate-type Pt/Nix/a-AlOOH catalysts
were developed to enhance the amount of hydroxyl group, therefore improving the
catalytic activities for formaldehyde oxidation at room temperature. The
analyzation results by XRD and HRTEM indicate that two kinds of materials,
AlOOH and NiOOH, are detected on the surface of Pt/Nix/a-AlOOH. It
can be seen from the result of TG that the hydroxyl group on the catalyst
surface increased after Ni was loaded. Furtherly, XPS results show that the
percentage of hydroxyl groups which can effectively absorb formaldehyde
increases from 36.4% to 72.8% by doping Ni. In
addition, the content of Pt0 increased from 27.5% to 45%. The results
indicate that optimized Pt1.15/Ni3.1/a-AlOOH has the best
catalytic activity with the CO2 conversion is 88% at 25°C and 100% at 40°C, while CO2 conversion over Pt1.2/a-AlOOH is 56% at 25°C and 100% at 100°C respectively. Hence, the Ni promoted
plate-type Pt/a-AlOOH possesses high efficiency and it provides a new idea for
catalyst design of formaldehyde oxidation.