摘要
Designing and tailoring metal-support interaction in Ni-based catalysts with plentiful interfacial sites is of significant interest for achieving a targeted catalytic performance in dry reforming of methane (DRM),but remains as a challenging task.In this work,Ni/Al_(2)O_(3)and Ni/CeO_(2)-Al_(2)O_(3)catalysts with the same strong metal-support interaction(SMSI) but distinct interface structure are developed by an improved evaporation-induced self-assembly method using pseudobohemite gel as aluminum source.Ni/CeO_(2)-Al_(2)O_(3)exhibits superior catalytic activity and stability in DRM in comparison with Ni/Al_(2)O_(3).The highest CH4and CO_(2)conversion reaches at 71.4%and 82.1%for Ni/CeO_(2)-Al_(2)O_(3),which are higher than that of 64.3% and 75.6% for Ni/Al_(2)O_(3)at 700℃.The SMSI effect in Ni/CeO_(2)-Al_(2)O_(3)provides more active interfacial sites with less coke deposition,and promotes the generation of active formate species which are the key intermediates for DRM.The findings of the present work could possibly pave the way for fabricating catalysts with SMSI strategy for efficient heterogeneous catalysis.
基金
National Natural Science Foundation of China(Nos.22108189,21878203)
Program for the Top Young and Middle-Aged Innovative Talents of Higher Learning Institutions of Shanxi
financial support by Shanxi-Zheda Institute of Ad-vanced Materials and Chemical Engineering(2021SX-TD005).
