Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 24, Pages 8319-8324Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.07.002
Keywords
Hydrogen evolution; Hydrogen bubbles; Electroless deposition of Au; Electrodeposited Ni
Categories
Funding
- National Science Foundation [ECCS-0901849, CMMI-1000831]
- Texas Higher Education Coordinating Board
- Characterization Center for Materials and Biology (CCMB) at University of Texas at Arlington
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In this report, we use stripe-patterned substrates and TEM grids as working electrodes to demonstrate that electrochemically evolved hydrogen bubbles can serve as templates and reducing agents for electroless deposition of Au from a Na(3)Au(SO(3))(2) electrolyte to form hollow particles. This new hollow nanoparticle formation mechanism, which is termed as bubble template synthesis, has the potential to become a general route to the fabrication of various metallic hollow nanoparticles. We have also found that the addition of Ni(2+) ions in the electrolyte has an effect on the particle formation process. Electrodeposited metallic Ni enhances the hydrogen evolution and therefore the hollow particle formation. It also leads to an improved size distribution of the hollow particles. (C) 2011 Elsevier Ltd. All rights reserved.
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