文献类型：期刊文献

英文题名：Formation of chlorate and perchlorate during electrochemical oxidation by Magneli phase -Ti4O7 anode: inhibitory effects of coexisting constituents

作者：Wang, Lu[1,2];Wang, Yaye[3];Sui, Yufei[3];Lu, Junhe[2];Hu, Baowei[1];Huang, Qingguo[3]

机构：[1]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China;[2]Nanjing Agr Univ, Dept Environm Sci & Engn, Nanjing 210095, Peoples R China;[3]Univ Georgia, Dept Crop & Soil Sci, Griffin, GA 30223 USA

年份：2022

卷号：12

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：SCI-EXPANDED(收录号：WOS:000965246300001)、、WOS

基金：This research was supported in part by U.S. Department of Defense SERDP ER-2717 and ER18-1320.

语种：英文

外文摘要：Formation of chlorate (ClO3-) and perchlorate (ClO4-) as by-products in electrooxidation process has raised concern. In the present study, the formation of ClO3- and ClO4- in the presence of 1.0 mM Cl- on boron doped diamond (BDD) and Magneli phase titanium suboxide (Ti4O7) anodes were evaluated. The Cl- was transformed to ClO3- (temporal maximum 276.2 mu M) in the first 0.5 h on BDD anodes with a constant current density of 10 mA cm(2,) while approximately 1000 mu M ClO4- was formed after 4.0 h. The formation of ClO3 - on the Ti4O7 anode was slower, reaching a temporary maximum of approximately 350.6 mu M in 4.0 h, and the formation of ClO4- was also slower on the Ti4O7 anode, taking 8.0 h to reach 780.0 mu M. Compared with the BDD anode, the rate of ClO3- and ClO4- formation on the Ti4O7 anode were always slower, regardless of the supporting electrolytes used in the experiments, including Na2SO4, NaNO3, Na2B4O7, and -Na2HPO4. It is interesting that the formation of ClO4- during electrooxidation was largely mitigated or even eliminated, when methanol, KI, and H2O2 were included in the reaction solutions. The mechanism of the inhibition on Cl- transformation by electrooxidation was explored.