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Structure‐activity relationship of supported Au catalysts with high catalytic activity by modifying the inactive supports
Author(s) -
Wang Shu,
Huo Rufei,
Li Changjiang,
Zhao Yaling,
Zheng Yuchuan
Publication year - 2018
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6478
Subject(s) - catalysis , x ray photoelectron spectroscopy , transmission electron microscopy , scanning electron microscope , nanoparticle , precipitation , chemical engineering , chemistry , powder diffraction , deposition (geology) , nuclear chemistry , materials science , nanotechnology , crystallography , organic chemistry , composite material , engineering , paleontology , physics , sediment , meteorology , biology
Three supported Au catalysts have been prepared by the deposition‐precipitation method by using the active carbon (AC), SiO 2 ‐AC, and SiO 2 ‐AC‐hollowed. The 3 supports were characterized by Brunauer‐Emmett‐Teller and scanning electron microscopy. Meanwhile, the supported Au nanoparticles were also characterized in detail by X‐ray powder diffraction, transmission electron microscopy, H 2 ‐TRP, and X‐ray photoelectron spectroscopy, and their catalytic activity and stability in CO oxidation was evaluated. The results demonstrated that Au supported on SiO 2 ‐AC‐hollowed exhibited much higher catalytic activity with acceptable stability for 72 hours than the other 2. We attributed to finer supported Au nanoparticles with abundant low‐coordinated Au atoms on the surfaces of hollowed supports with large special surface area and abundant pore structure. In summary, we successfully found an efficient and cheap method to prepare catalysts with high catalytic activity and acceptable stability by modifying the inactive supports.