Journal
MATERIALS RESEARCH BULLETIN
Volume 48, Issue 7, Pages 2648-2653Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.03.037
Keywords
Nanostructures; Electrochemical properties; Catalytic properties
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Rod-like precursors of Co3O4 and Ag/Co3O4 composites with different Ag contents were synthesized via a co-precipitation method. Co3O4 and Ag/Co3O4 composite samples were fabricated by calcining each precursor at 400 degrees C for 3 h. The as-prepared samples were characterized by thermogravimetric analysis and differential thermal gravimetric analysis (TGA/DTA), X-ray diffraction (XRD), transmission electron microscopy (TEM), and field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), respectively. Co3O4 and Ag/Co3O4 composites were used as electrocatalyst modified on a glassy carbon electrode for p-nitrophenol reduction in basic solution. The results showed that p-nitrophenol could be reduced effectively on the modified electrode. By comparison with a bare glassy carbon electrode, peak current increased markedly with Co3O4 and Ag/Co3O4 samples, and peak potential decreased obviously with Ag/Co3O4 samples. Ag/Co3O4 composites with 4% Ag exhibited the highest electrocatalytic activity for p-nitrophenol reduction. (C) 2013 Elsevier Ltd. All rights reserved.
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