Nano Express

Nanoscale Research Letters

, Volume 5, Issue 2, pp 332-337

Open Access This content is freely available online to anyone, anywhere at any time.

Avoiding Loss of Catalytic Activity of Pd Nanoparticles Partially Embedded in Nanoditches in SiC Nanowires

  • Xiao-Ning GuoAffiliated withState Key Laboratory of Coal Conversion, Institute of Coal ChemistryGraduate University of the Chinese Academy of Sciences
  • , Ru-Jing ShangAffiliated withState Key Laboratory of Coal Conversion, Institute of Coal ChemistryGraduate University of the Chinese Academy of Sciences
  • , Dong-Hua WangAffiliated withState Key Laboratory of Coal Conversion, Institute of Coal Chemistry
  • , Guo-Qiang JinAffiliated withState Key Laboratory of Coal Conversion, Institute of Coal Chemistry
  • , Xiang-Yun GuoAffiliated withState Key Laboratory of Coal Conversion, Institute of Coal Chemistry Email author 
  • , K. N. TuAffiliated withDepartment of Materials Science and Engineering, University of California at Los Angeles Email author 

Abstract

Nanoditches from selective etching of periodically twinned SiC nanowires were employed to hinder the migration and coalescence of Pd nanoparticles supported on the nanowires, and thus to improve their catalytic stability for total combustion of methane. The results show that the etched Pd/SiC catalyst can keep the methane conversion of almost 100% while the unetched one has an obvious decline in the catalytic activity from 100 to 82% after ten repeated reaction cycles. The excellent catalytic stability originates from the limitation of the nanoditches to the migration and growth of Pd nanoparticles.

Keywords

SiC nanowires Selective etching Pd nanoparticles High catalytic stability