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Ling Zhang: Electrocatalysis of chemically synthesized noble metal nanoparticles on carbon electrodes

posted 28 Jul 2015, 05:06 by info admin
Ling Zhang, Jens Ulstrup, Jingdong Zhang*
Department of Chemistry, NanoChemistry group, Technical University of Denmark (DTU), Denmark,

Noble metal nanoparticles (NPs), such as platinum (Pt) and palladium (Pd) NPs are promising catalysts for dioxygen reduction and oxidation of molecules such as formic acid and ethanol in fuel cells. Carbon nanomaterials are ideal supporting materials for electrochemical catalysts due to their good conductivity, chemical inertness and low cost [1]. Improvement of catalytic efficiency and stability of the NPs is, however, essential for their wider applications in electrochemical energy conversion/storage. The activities of noble metal catalysts depend not only on their size, composition, and shapes [2] but also on their interfacial interaction with the supporting electrodes. In this work we aim at chemical production of size and shape controlled, specifically 22 nm cubic Pd NPs, and further understanding of the Pd NPs as electrocatalysts at the nanometer scale using both scanning tunneling microscopy (STM) and atomic force microscopy (AFM) which have proved to be highly efficient techniques to map the in situ structures of self-assembled molecular monolayers at molecular or sub-molecular resolution [3]. Electrocatalysis of the Pd NPs immobilized on atomically flat, highly oriented pyrolytic graphite (HOPG) will be investigated by electrochemical SPM. This study offers promise for development of new high-efficiency catalyst types with low-cost for fuel cell technology.

  1. Y. S. Jeong, J.-B. Park, H.-G. Jung, J. Kim, X. Luo, J. Lu, L. Curtiss, K. Amine, Y.-K. Sun, B. Scrosati and Y. J. Lee, Nano Lett., 2015, 15, 4261-4268.
  2. L. Zhang, W. Niu and G. Xu, Nano Today, 2012, 7, 586-605.
  3.  J. Zhang, A. C. Welinder, Q. Chi and J. Ulstrup, Phys. Chem. Chem. Phys., 2011, 13, 5526-5545.                

Ling Zhang is a postdoc in the NanoChemistry group, Department of Chemistry, Technical University of Denmark (DTU). The current project is supported by The H.C. Ørsted COFUND Program. Her research interests focus on shape controlled synthesis of colloidal noble metal nanocrystals and their electrochemical catalytic properties, electron transfer of molecules and biomolecules, and electrochemical catalysis of 2D materials. She has a strong expertise in scanning probe microscopy, electrochemical catalysis, synthesis of shape controlled colloidal noble metal nanocrystals, and structural analysis of nanoparticles. She obtained her Ph. D. degree at Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (CAS) in 2014 and a bachelor degree at Department of Chemistry of Jilin University in 2008. She worked at Department of Physics, Hong Kong Polytechnic University as a Research Associate in the electrocatalysis of 2D materials in 2014. She won the scholarship of the joint CAS-CNRS doctoral promotion program and worked on enzyme projects at Université Paris Diderot in 2012.  She has published more than 20 papers, including papers in ACS Nano, Nano Today, and Analytical Chemistry, and has attended five international conferences in nanomaterials and electrochemistry.