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Title: Electrolyte Concentration Effect of a Photoelectrochemical Cell Consisting of TiO 2 Nanotube Anode

The photoelectrochemical responses of a TiO 2 nanotube anode in ethylene glycol (EG), glycerol, ammonia, ethanol, urea, and Na 2 S electrolytes with different concentrations were investigated. The TiO 2 nanotube anode was highly efficient in photoelectrocatalysis in these solutions under UV light illumination. The photocurrent density is obviously affected by the concentration change. Na 2 S generated the highest photocurrent density at 0, 1, and 2 V bias voltages, but its concentration does not significantly affect the photocurrent density. Urea shows high open circuit voltage at proper concentration and low photocurrent at different concentrations. Externally applied bias voltage is also an important factor that changes the photoelectrochemical reaction process. In view of the open circuit voltage, EG, ammonia, and ethanol fuel cells show the trend that the open circuit voltage (OCV) increases with the increase of the concentration of the solutions. Glycerol has the highest OCV compared with others, and it deceases with the increase in the concentration because of the high viscosity. The OCV of the urea and Na 2 S solutions did not show obvious concentration effect.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [3]
  1. Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, 2801 W Bancroft Street, Toledo, OH 43606, USA
  2. Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, 2801 W Bancroft Street, Toledo, OH 43606, USA, Department of Mechanical Engineering, California State Polytechnic University-Pomona, 3801 W Temple Avenue, Pomona, CA 91768, USA
  3. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, USA
Publication Date:
OSTI Identifier:
1227910
Grant/Contract Number:
AC02-98CH10886
Type:
Published Article
Journal Name:
ISRN Materials Science
Additional Journal Information:
Journal Volume: 2013; Related Information: CHORUS Timestamp: 2016-07-30 11:34:08; Journal ID: ISSN 2090-6099
Publisher:
Hindawi Publishing Corporation
Sponsoring Org:
USDOE
Country of Publication:
Country unknown/Code not available
Language:
English