Chemija / Chemistry
 ISSN 0235-7216 ISSN 2424-4538 (online) |
2015 m. Nr. 3 Investigation of sodium borohydride oxidation on CoB/Cu and CoBW/Cu modified with Au nanoparticles
The Au/CoB and Au/CoBW catalysts were deposited on the copper surface via electroless CoB and CoBW coating deposition followed by a spontaneous galvanic Au displacement from the HAuCl4 solution. The morphology and composition of the prepared catalysts were characterized using Field-Emission Scanning Electron Microscopy, Energy Dispersive X-ray Spectroscopy and Xray Photoelectron Spectroscopy. The electrochemical behaviour of the fabricated Au/CoB/Cu and Au/CoBW/Cu catalysts was examined towards the oxidation of BH4 – ions in an alkaline medium by means of Cyclic Voltammetry. The as-prepared Au/CoB/Cu and Au/CoBW/Cu catalysts exhibited a higher electrocatalytic activity towards the oxidation of BH4 – ions as compared with that of pure Au, CoB/Cu and CoBW/Cu electrodes. The Au/CoBW/Cu catalyst with the Au loading of 5.8 μg cm–2 and with deposited Au nanoparticles in size from 7 to 40 nm has the highest mass activity (mA μgAu –1).
Keywords: gold, cobalt, tungsten, copper, galvanic displacement, borohydride oxidation |
Issues:
2017 - Vol.28 No. 1, No. 2, No. 3, No. 4 2016 - Vol.27 No. 1, No. 2, No. 3, No. 4 2015 - Vol.26 No. 1, No. 2, No. 3, No. 4 2014 - Vol.25 No. 1, No. 2, No. 3, No. 4 2013 - Vol.24 No. 1, No. 2, No. 3, No. 4 2012 - Vol.23 No. 1, No. 2, No. 3, No. 4 2011 - Vol.22 No. 1, No. 2, No. 3, No. 4 2010 - Vol.21 No. 1, No. 2-4 2009 - Vol.20 No. 1, No. 2, No. 3, No. 4 2008 - Vol.19 No. 1, No. 2, No. 3-4 2007 - Vol.18 No. 1, No. 2, No. 3, No. 4 2006 - Vol.17 No. 1, No. 2-3, No. 4 2005 - Vol.16 No. 1, No. 2, No. 3-4 2004 - Vol.15 No. 1, No. 2, No. 3, No. 4 2003 - Vol.14 No. 1, No. 2, No. 3, No. 4 2002 - Vol.13 No. 1, No. 2, No. 3, No. 4 2001 - Vol.12 No. 1, No. 2, No. 3, No. 4 |