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 | |
刊名 | POWDER DIFFRACTION
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2017-09-01 | |
卷号 | 32期号:3页码:168-174 |
关键词 | In Situ Xrd In Situ Ftir K2cro4 Reduction Mechanism Activated Kxcroy |
ISSN号 | 0885-7156 |
DOI | 10.1017/S0885715617000690 |
文献子类 | Article |
英文摘要 | 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. |
WOS关键词 | Cr2o3 Nanoparticles ; Green Pigment ; Chromium ; Spectroscopy ; Chromates ; Spectra ; Oxide |
WOS研究方向 | Materials Science |
语种 | 英语 |
WOS记录号 | WOS:000425747100002 |
资助机构 | 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) |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/24042] ![]() |
专题 | 过程工程研究所_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 |
推荐引用方式 GB/T 7714 | 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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