期刊
ELECTROCHIMICA ACTA
卷 231, 期 -, 页码 354-362出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.02.072
关键词
Pd doping; metal interaction; electrochemical degradation; Ni-EDTA
资金
- National Nature Science Foundation of China [21677052]
- Major Science and Technology Program for the Industry-AcademiaResearch Collaborative Innovation [201605122301117, 201604010043]
- Guangdong Province Science and Technology Project [2016B090918104, 2013B090200016, 2015B020215007, 2015B020235009, 2016B020240005]
- State Key Laboratory of Pulp and Paper Engineering [2016C03]
- Joint fund of Guangdong Province [U1401235]
- Electric Power Research Institute of Guangdong Grid Co [ZY-KJ-YX-2016X085F]
An optimized metal oxide electrode (Ti/SnO2-Sb-Pd) was prepared via thermal decomposition and used in the electrochemical degradation of Ni-EDTA. The electrode was characterized by SEM, XRD, XPS, and electrochemical characterizations including linear-sweep voltammetry (LSV), cyclic voltammetry (CV) and chronopotentiometry (CP) techniques. It was found that Pd doping could effectively change the surface morphology and lattice parameters of the metal oxide electrode. Pd can facilitate the entry of more Sb into SnO2 crystals and promote the reduction of Sb from the +5 to the +3 state. The interaction of these metals raised the oxygen evolution potential (OEP) and electrochemical surface area of the electrode, in addition to reducing the degradation potential and increasing the degradation current of NiEDTA. When the molar ratio of Pd: Sn was 2.5%, the electrode could simultaneously degrade 87.5% of NiEDTA and recycle 17.9% of elemental Ni on the cathode within 120 min. At the same time, with Pd doping, the lifetime of the electrode was increased more than 40 times, demonstrating good potential for application in industry. (C) 2017 Elsevier Ltd. All rights reserved.
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