Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 295, Issue 1-2, Pages 34-38Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2008.08.013
Keywords
Hydrazine oxidation; Silver electrode; Hydrothermal method; Nanoparticles; Ti electrode
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Funding
- National Natural Science Foundation of China [20876038]
- Scientific Research Fund of Hunan Provincial Education Department, China [07AO19]
- Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry, China [11108]
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Silver nanoparticles were directly deposited on the Surface of titanium by the hydrothermal method using polyethylene glycol as the reduction agent. The electrocatalytic activity of the prepared titanium-supported nanoAg/Ti electrode towards hydrazine oxidation in alkaline Solutions was evaluated using cyclic voltammetry (CV) and chronoamperometry (CA). The CV results show that the nanoAg/Ti electrode is electrochemically active towards hydrazine oxidation with oxidation potentials ranging between -0.6 and 0.6V vs. SCE. The onset potential of ca. -0.6 V vs. SCE for the hydrazine oxidation was recorded. A sharp increment in the current density of hydrazine oxidation with the increase of the hydrazine concentration was observed. CA results show stable steady-state current densities (i(ss)) for the hyrdrazine oxidation. For the anodic potential holding at 0.1 V, the CA measurement delivered the i(ss) value of over 0.58 mA cm(-2) mM(-1) in the presence of 20 mM hydrazine. A linear dependence of the i(ss) upon the hydrazine concentration was found in the range of 0-60 mM hydrazine. Results imply that the nanoAg/Ti electrode presents stable and significantly high electroactivity for the hydrazine oxidation. (c) 2008 Elsevier B.V. All rights reserved.
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