Thermally stable single atom Pt/m-Al2O3 for selective hydrogenation and CO oxidation

Zailei Zhang, Yihan Zhu, Hiroyuki Asakura, Bin Zhang, Jiaguang Zhang, Maoxiang Zhou, Yu Han, Tsunehiro Tanaka, Aiqin Wang, Tao Zhang and Ning Yan ()
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Zailei Zhang: National University of Singapore
Yihan Zhu: Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology
Hiroyuki Asakura: Graduate School of Engineering, Kyoto University
Bin Zhang: National University of Singapore
Jiaguang Zhang: National University of Singapore
Maoxiang Zhou: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Yu Han: Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology
Tsunehiro Tanaka: Graduate School of Engineering, Kyoto University
Aiqin Wang: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Tao Zhang: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Ning Yan: National University of Singapore

Nature Communications, 2017, vol. 8, issue 1, 1-10

Abstract: Abstract Single-atom metal catalysts offer a promising way to utilize precious noble metal elements more effectively, provided that they are catalytically active and sufficiently stable. Herein, we report a synthetic strategy for Pt single-atom catalysts with outstanding stability in several reactions under demanding conditions. The Pt atoms are firmly anchored in the internal surface of mesoporous Al2O3, likely stabilized by coordinatively unsaturated pentahedral Al3+ centres. The catalyst keeps its structural integrity and excellent performance for the selective hydrogenation of 1,3-butadiene after exposure to a reductive atmosphere at 200 °C for 24 h. Compared to commercial Pt nanoparticle catalyst on Al2O3 and control samples, this system exhibits significantly enhanced stability and performance for n-hexane hydro-reforming at 550 °C for 48 h, although agglomeration of Pt single-atoms into clusters is observed after reaction. In CO oxidation, the Pt single-atom identity was fully maintained after 60 cycles between 100 and 400 °C over a one-month period.

Date: 2017
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DOI: 10.1038/ncomms16100

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