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

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 microscop...

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Bibliographic Details
Published in:	Frontiers of Chemical Science and Engineering 2015-12, Vol.9 (4), p.442-449
Main Authors:	Cao, Xinxiang, Mirjalili, Arash, Wheeler, James, Xie, Wentao, Jang, Ben W.-L.
Format:	Article
Language:	eng
Subjects:	acetylene hydrogenation Chemistry Chemistry and Materials Science H 2 pulse chemisorption HAADF-STEM Industrial Chemistry/Chemical Engineering Nanotechnology palladium-copper bimetallic catalyst Research Article single atom alloy 乙炔制备方法单原子双金属催化剂合金催化剂选择性加氢透射电子显微镜钯催化
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Summary:	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 singleatom 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.
ISSN:	2095-0179 2095-0187