Improved CO-PROX selectivity of CuO/CeO2 catalysts by decorating with lanthanum via surface Cuξ+ redox site

Wang，Lipeng1; Li，Qi2; Liu，Xue1; Li，Chao1; Zhao，Zizhou1; Diao，Sitong3,4; Cao，Daofan1,5; Xiang，Decheng5; Wu，Changning3; Liu，Ke1,3,4

2024-03-15

10.1016/j.apsusc.2023.159087

Applied Surface Science   影响因子和分区

0169-4332

Hydrogen purification is essential to satisfy the various purity requirements for different applications. Preferential oxidation of carbon monoxide (CO-PROX) is a promising strategy for removing CO from H-rich reformate in proton exchange membrane fuel cells (PEMFCs). Nonetheless, the large proportion of H production via methanol steam reforming (MSR) will intensify oxidation competition between H and CO, and the CO conversion and CO selectivity decrease considerably with increasing temperature. The tolerance of the PEMFCs against the CO species absorbed upon the surface presents the biggest dilemma. This work modified the conventional CuO/CeO catalyst in the CO-PROX by doping the support with lanthanum (La). CuO/La-CeO catalyst can effectively eliminate CO (<10 ppm) in 70 vol% H and exhibit superior stability over 50 % selectivity in CO-PROX reaction. The surface properties of the catalyst before and after modification are characterized by XRD, N isothermal adsorption–desorption, H-TPR, XPS, (HR)TEM Raman and Operando FT-IR, demonstrating that the La-CeO anchors CuO particle provides stable low-valence Cu sites (Cu) with enhanced catalytic selectivity.

CO2 selectivity CuO/CeO2 catalyst Preferential oxidation of CO Rich-hydrogen resistance

SCI

英语

第一 ; 通讯

MATERIALS SCIENCE

2-s2.0-85180413328

Scopus

1.Department of Chemistry,College of Science,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Gas Corporation Ltd.,Shenzhen,Shenran Building, No.268, Meiao Yi Road,518049,China
3.College of Innovation and Entrepreneurship,Southern University of Science and Technology,Shenzhen,518055,China
4.Guangdong Provincial Key Laboratory of Catalysis,Southern University of Science and Technology,Shenzhen,518055,China
5.Neutral Energy Intelligence Technology (Shenzhen) Corporation Ltd.,Shenzhen,518109,China

Wang，Lipeng,Li，Qi,Liu，Xue,et al. Improved CO-PROX selectivity of CuO/CeO2 catalysts by decorating with lanthanum via surface Cuξ+ redox site[J]. Applied Surface Science,2024,649.

Wang，Lipeng.,Li，Qi.,Liu，Xue.,Li，Chao.,Zhao，Zizhou.,...&Liu，Ke.(2024).Improved CO-PROX selectivity of CuO/CeO2 catalysts by decorating with lanthanum via surface Cuξ+ redox site.Applied Surface Science,649.

Wang，Lipeng,et al."Improved CO-PROX selectivity of CuO/CeO2 catalysts by decorating with lanthanum via surface Cuξ+ redox site".Applied Surface Science 649(2024).