US EPA

742391 

Journal Article 

Distinctive Tin Dioxide Anode Fabricated by Pulse Electrodeposition: High Oxygen Evolution Potential and Efficient Electrochemical Degradation of Fluorobenzene 

Wu, T; Zhao, G; Lei, Y; Li, P 

2011 

Yes 

Journal of Physical Chemistry C
ISSN: 1932-7447
EISSN: 1932-7455 

115 

10 

3888-3898 

10.1021/jp110149v 

WOS:000288113400010 

http://pubs.acs.org/doi/abs/10.1021/jp110149v
Exit
 

A distinctive Sb-doped SnO(2) anode with a high oxygen evolution potential, 24 V vs the saturated calomel electrode, and a strong electrochemical oxidation ability was prepared on TiO(2) nanotubes through the pulse electiodeposition method. Compared with the traditional Sb-doPed SnO(2) electrode prepared by the sol gel method, the proposed SnO(2) electrode has a higher crystallinity, a higher order degree of the atomic lattice, and a lower concentration of oxygen vacancies. The scanning electron microscopy image confirms that the surface of the electrode presents a three-dimensional structure consisting of Sb-dOped SnO(2) nanoparticles with a certain microspherical structure, which increases the specific area greatly and provides more active sites. The reaction activation energy also decreases from 11.67 kJ mol(-1) for the traditional SnO(2) electrode to 5.73 kJ mol(-1). This SnO(2) electrode is demonstrated to have a superior electrochemical oxidation ability for refractory fluorobenzene, which is extremely stable and cannot even be degraded effectively on a boron doped diamond electrode with a strong oxidation capacity. The results also indicate that the distinctive SnO(2) electrode has a higher apparent rate constant, total organic carbon removal, and mineralization current efficiency, which are 12, 2.6, and 3.3 times those of the traditional SnO(2) electrode, respectively. The evolution of intermediates and the degradation mechanism of fluorobenzene were further discussed. This study provides a distinctive SnO(2) anode for the effective electrochemical oxidation of refractory toxic organic pollutants.