title: Three-Dimensional Nitrogen-Doped Reduced Graphene Oxide-Carbon Nanotubes Architecture Supporting Ultrafine Palladium Nanoparticles for Highly Efficient Methanol Electrooxidation.
abstract: A three-dimensional (3D) nitrogen-doped reduced graphene oxide (rGO)-carbon nanotubes (CNTs) architecture supporting ultrafine Pd nanoparticles is prepared and used as a highly efficient electrocatalyst. Graphene oxide (GO) is first used as a surfactant to disperse pristine CNTs for electrochemical preparation of 3D rGO@CNTs, and subsequently one-step electrodeposition of the stable colloidal GO-CNTs solution containing Na2 PdCl4 affords rGO@CNTs-supported Pd nanoparticles. Further thermal treatment of the Pd/rGO@CNTs hybrid with ammonia achieves not only in situ nitrogen-doping of the rGO@CNTs support but also extraordinary size decrease of the Pd nanoparticles to below 2.0 nm. The resulting catalyst is characterized by scanning and transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. Catalyst performance for the methanol oxidation reaction is tested through cyclic voltammetry and chronoamperometry techniques, which shows exceedingly high mass activity and superior durability.
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-Effective Utilization of Fossil Fuel Aimed at Reducing Carbon Dioxide Emissions, Hunan University, Changsha 410082 (P. R. China).
authors.forename: Hejie
authors.initials: H
authors.lastname: Song
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-Effective Utilization of Fossil Fuel Aimed at Reducing Carbon Dioxide Emissions, Hunan University, Changsha 410082 (P. R. China).
authors.forename: Liming
authors.initials: L
authors.lastname: Yang
authors.affiliation: College of Materials Science and Engineering, Hunan University, Changsha 410082 (P. R. China).
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Tang
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-Effective Utilization of Fossil Fuel Aimed at Reducing Carbon Dioxide Emissions, Hunan University, Changsha 410082 (P. R. China).
authors.forename: Dafeng
authors.initials: D
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-Effective Utilization of Fossil Fuel Aimed at Reducing Carbon Dioxide Emissions, Hunan University, Changsha 410082 (P. R. China). chem_cbliu@hnu.edu.cn.
authors.forename: Chengbin
authors.initials: C
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-Effective Utilization of Fossil Fuel Aimed at Reducing Carbon Dioxide Emissions, Hunan University, Changsha 410082 (P. R. China). sllou@hnu.edu.cn.
authors.forename: Shenglian
authors.initials: S
authors.lastname: Luo
keywords: carbon nanotubes; electrocatalysis; electrodeposition; palladium; reduced graphene oxide