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Research Article

Pd single-atom catalysts derived from strong metal–support interaction for selective hydrogenation of acetylene

Yalin Guo1,2, Yangyang Li1,2, Xiaorui Du3, Lin Li1, Qike Jiang4(), Botao Qiao1()
CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
University of Chinese Academy of Sciences, Beijing 100049, China
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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Pd single-atom catalysts (SACs) were fabricated by a simple strategy, reducing supported Pd catalysts at suitable temperatures to selectively encapsulate the co-existed Pd nanoparticles (NPs)/clusters, which exhibit much higher selectivity and stability in semi-hydrogenation of acetylene.

Abstract

Selective hydrogenation of acetylene in excess ethylene is an important reaction in both fundamental study and practical application. Pd-based catalysts with high intrinsic activity are commonly employed, but usually suffer from low selectivity. Pd single-atom catalysts (SACs) usually exhibit outstanding ethylene selectivity due to the weak π-bonding ethylene adsorption. However, the preparation of high-loading and stable Pd SACs is still confronted with a great challenge. In this work, we report a simple strategy to fabricate Pd SACs by means of reducing conventional supported Pd catalysts at suitable temperatures to selectively encapsulate the co-existed Pd nanoparticles (NPs)/clusters. This is based on our new finding that single atoms only manifest strong metal–support interaction (SMSI) at higher reduction temperature than that of NPs/clusters. The derived Pd SACs (Pd1/CeO2 and Pd1/α-Fe2O3) were applied to acetylene selective hydrogenation, exhibiting much improved ethylene selectivity and high stability. This work offers a promising way to develop stable Pd SACs easily.

Keywords

selective hydrogenation of acetylenePd single-atom catalysts (SACs)weak π-bonding ethylene adsorptionstrong metal–support interaction (SMSI)

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Nano Research
Volume 15 Issue 12,
December 2022
Pages 10037-10043
DOI: 10.1007/s12274-022-4376-5
Cite this article:
Guo Y, Li Y, Du X, et al. Pd single-atom catalysts derived from strong metal–support interaction for selective hydrogenation of acetylene. Nano Research, 2022, 15(12): 10037-10043. https://doi.org/10.1007/s12274-022-4376-5
Topics:
Selective catalytic reduction
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NR45 Awards in Nanocatalysis, 2022
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