Journal
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
Volume 9, Issue 5, Pages 897-904Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11783-015-0782-1
Keywords
nitrobenzene; nano-structured Cu; electroreduction; voltage-dependent electrodeposition; high selectivity; high stability
Categories
Funding
- National Basic Research Program of China [2011CB933702]
- Program for Changjiang Scholars and Innovative Research Team in University
- Collaborative Innovation Center of Suzhou Nano Science and Technology of Ministry of Education of China
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Pollution caused by toxic nitrobenzene has been a widespread environmental concern. Selective reduction of nitrobenzene to aniline is beneficial to further efficient and cost-effective biologic treatment. Electrochemical reduction is a promising method and Cu-based catalysts have been found to be an efficient cathode material for this purpose. In this work, Cu catalysts with different morphologies were fabricated on Ti plate using a facile electrodepositon method via tuning the applied voltage. The dendritic nano-structured Cu catalysts obtained at high applied voltages exhibited an excellent efficiency and selectivity toward the reduction of nitrobenzene to aniline. Effects of the working potential and initial nitrobenzene concentration on the selective reduction of nitrobenzene to aniline using the Cu/Ti electrode were investigated. A high rate constant of 0.0251 min(-1) and 97.1% aniline selectivity were achieved. The fabricated nano-structured Cu catalysts also exhibited good stability. This work provides a facile way to prepare highly efficient, cost-effective, and stable nano-structured electrocatalysts for pollutant reduction.
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