炔烃
金属间化合物
催化作用
烯烃
选择性
吸附
材料科学
离解(化学)
氢
组合化学
化学
化学工程
物理化学
冶金
有机化学
工程类
合金
作者
Xiaohu Ge,Yanjun Jing,Nina Fei,Kelin Yan,Yijing Liang,Yueqiang Cao,Jing Zhang,Gang Qian,Lina Li,Hao Jiang,Xinggui Zhou,Weikang Yuan,Xuezhi Duan
标识
DOI:10.1002/anie.202410979
摘要
Catalytic removal of alkynes is essential in industry for producing polymer-grade alkenes from steam cracking processes. Non-noble Ni-based catalysts hold promise as effective alternatives to industrial Pd-based catalysts but suffer from low activity. Here we report embedding of single-atom Pd onto the NiGa intermetallic surface with replacing Ga atoms via a well-defined synthesis strategy to design Pd1-NiGa catalyst for alkyne semi-hydrogenation. The fabricated Pd1Ni2Ga1 ensemble sites deliver remarkably higher specific mass activity under superb alkene selectivity of >96% than the state-of-the-art catalysts under industry-relevant conditions. Integrated experimental and computational studies reveal that the single-atom Pd located synergizes with the neighbouring Ni sites to facilitate the σ-adsorption of alkyne and dissociation of hydrogen while suppress the alkene adsorption. Such synergistic effects confer the single-atom Pd on the NiGa intermetallic with a Midas touch for alkyne semi-hydrogenation, providing an effective strategy for stimulating low active Ni-based catalysts for other selective hydrogenations in industry.
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