In situ high-temperature X-ray diffraction studies of reduction of K2CrO4 and the formation of KxCrOy compounds
Liang, Shu-ting1,2; Zhang, Hong-ling1,2; Luo, Min-ting1,2; Bai, Yu-lan3; Xu, Hong-bin1,2; Zhang, Yi1,2
2017-09-01
发表期刊POWDER DIFFRACTION
ISSN0885-7156
卷号32期号:3页码:168-174
摘要In this work, the reduction mechanism of potassium chromate (K2CrO4) was investigated via in situ high-temperature X-ray diffraction coupled with Fourier transform infrared spectroscopy. During the hydrogen reduction of K2CrO4, the formation of K3CrO4, KCrO2, and KxCrO2 were detected for the first time. The study discovered that K2CrO4 was firstly reduced to K3CrO4 and an amorphous Cr(III) intermediate product at low temperature (400-500 degrees C). Moreover, the K3CrO4 was the only crystalline material at this stage. As the temperature increased, a stabilized amorphous CrOOH was formed. At a high temperature (550-700 degrees C), KCrO2 was generated. Interestingly, a portion of KCrO2 was spontaneously decomposed during the hydrogen reduction, accompanying by the formation of K0.7CrO2. Finally, the results clearly illustrated the reduction mechanism of K2CrO4: K2CrO4 -> K3CrO4 amorphous intermediate KCrO2. (C) 2017 International Centre for Diffraction Data.
关键词In Situ Xrd In Situ Ftir K2cro4 Reduction Mechanism Activated Kxcroy
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1017/S0885715617000690
收录类别SCI ; ISTP
语种英语
关键词[WOS]CR2O3 NANOPARTICLES ; GREEN PIGMENT ; CHROMIUM ; SPECTROSCOPY ; CHROMATES ; SPECTRA ; OXIDE
WOS研究方向Materials Science
WOS类目Materials Science, Characterization & Testing
项目资助者National Natural Science Foundation of China(11204304) ; National Basic Research Program (973 Program) of China(2013CB632600) ; National High-tech Research and Development Program of China(2011AA060702)
WOS记录号WOS:000425747100002
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24042
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Qingdao Agr Univ, Coll Chem & Pharmaceut Sci, Qingdao 266109, Peoples R China
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Liang, Shu-ting,Zhang, Hong-ling,Luo, Min-ting,et al. In situ high-temperature X-ray diffraction studies of reduction of K2CrO4 and the formation of KxCrOy compounds[J]. POWDER DIFFRACTION,2017,32(3):168-174.
APA Liang, Shu-ting,Zhang, Hong-ling,Luo, Min-ting,Bai, Yu-lan,Xu, Hong-bin,&Zhang, Yi.(2017).In situ high-temperature X-ray diffraction studies of reduction of K2CrO4 and the formation of KxCrOy compounds.POWDER DIFFRACTION,32(3),168-174.
MLA Liang, Shu-ting,et al."In situ high-temperature X-ray diffraction studies of reduction of K2CrO4 and the formation of KxCrOy compounds".POWDER DIFFRACTION 32.3(2017):168-174.
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