Investigation of the preparation methodologies of Pd-Cu single atom alloy catalysts for selective hydrogenation of acetylene

Xinxiang Cao, Arash Mirjalili, James Wheeler, Wentao Xie, Ben W.-L. Jang

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Front. Chem. Sci. Eng. ›› 2015, Vol. 9 ›› Issue (4) : 442-449. DOI: 10.1007/s11705-015-1547-x
RESEARCH ARTICLE
RESEARCH ARTICLE

Investigation of the preparation methodologies of Pd-Cu single atom alloy catalysts for selective hydrogenation of acetylene

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Abstract

Galvanic replacement, co-impregnation and sequential impregnation have been employed to prepare Pd-Cu bimetallic catalysts with less than 1 wt-% Cu and ca. 0.03 wt-% Pd for selective hydrogenation of acetylene in excess ethylene. High angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) and H2 chemisorption results confirmed that Pd-Cu single-atom alloy structures were constructed in all three bimetallic catalysts. Catalytic tests indicated that when the conversion of acetylene was above 99%, the selectivity of ethylene of these three single atom alloy catalysts was still more than 73%. Furthermore, the single atom alloy catalyst prepared by sequential incipient wetness impregnation was found to have the best stability among the three procedures used.

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Keywords

palladium-copper bimetallic catalyst / single atom alloy / acetylene hydrogenation / HAADF-STEM / H2 pulse chemisorption

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Xinxiang Cao, Arash Mirjalili, James Wheeler, Wentao Xie, Ben W.-L. Jang. Investigation of the preparation methodologies of Pd-Cu single atom alloy catalysts for selective hydrogenation of acetylene. Front. Chem. Sci. Eng., 2015, 9(4): 442‒449 https://doi.org/10.1007/s11705-015-1547-x

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Acknowledgements

The authors acknowledge the support of Welch Foundation (#T-0014) and NSF grant (#1263094). HR-STEM analyses were conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility.

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
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