碱性介质电催化体系活性氧的生成及其光谱学研究

	碱性介质电催化体系活性氧的生成及其光谱学研究
	薛玉冬; 郑诗礼; 张懿; 金伟
刊名	光谱学与光谱分析
	2018
卷号	38 期号:7 页码:2044
ISSN号	1000-0593
英文摘要	Liquid oxidation techniques by sub-molten salt media for the effective extraction of amphoteric metal from refractory minerals have been developed. An innovative synergistic process by electrochemical oxidation and reactive oxygen species (ROS) intensify was further proposed. In the present study, the mechanism of ROS formation and conversion in the electrocatalytic process was systematically revealed by UV-Vis spectra and electron spin resonance (ESR) measurement. The reactive species were in-situ generated by two-electron oxygen reduction reaction (ORR) at the cathode surface. The center dot OH was produced from the self-induced reaction between amphoteric metal ions and HO2-, which was beneficial for the oxidation dissolution process and considered as an alkaline electrochemical advanced oxidation process. The catalytic oxidation process of low-valance amphoteric metal oxides (Cr2O3 and V2O3) by ROS was illustrated by UV-Vis spectra. Furthermore, V2O3 was more easily dissolved than Cr2O3 with the presence of ROS according to the thermodynamic data of standard free energy change. The center dot OH in the electrochemical system was detected by the ESR technique. The ESR signal of center dot OH catalyzed by V2O3 was more remarkable than that of Cr2O3. The quenching experiment result proved that center dot OH with high standard oxidation potential played a promoting role in the liquid oxidation process. The present investigation provides further standing for the electrochemical oxidative dissolution in alkaline media.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/33447]
专题	中国科学院过程工程研究所
作者单位	中国科学院过程工程研究所
推荐引用方式 GB/T 7714	薛玉冬,郑诗礼,张懿,等. 碱性介质电催化体系活性氧的生成及其光谱学研究[J]. 光谱学与光谱分析,2018,38(7):2044.
APA	薛玉冬,郑诗礼,张懿,&金伟.(2018).碱性介质电催化体系活性氧的生成及其光谱学研究.光谱学与光谱分析,38(7),2044.
MLA	薛玉冬,et al."碱性介质电催化体系活性氧的生成及其光谱学研究".光谱学与光谱分析 38.7(2018):2044.