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Effects of V, Cs, and Cu on the thermal behavior of Keggin phosphomolybdates
Yu, Jiayuan1,2; Wang, Lei1; Zhang, Guoliang1; Yan, Ruiyi1; Li, Chunshan1
2022-01-21
Source PublicationJOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN1388-6150
Pages10
AbstractHeteropoly acids (HPAs) are a kind of important compounds possessing acidic and redox properties, but their applications are restricted by the poor stability. In this work, the effects of vanadium, cesium, and copper modification on the thermal stability of Keggin phosphomolybdates were investigated. The structure and phase transformation of HPAs and the salts were detected by XRD and DTA-TG in the thermal decomposition process. Results showed that the HPAs would decompose into oxides as a result of loss of water. The decomposition processes of the heteropoly salts showed different characteristics. The copper-doped salts would fully decompose into oxides of the corresponding elements, while the salts containing cesium would reserve the Keggin structure as neutral salts Cs(3+x)HPAV(x) and other compositions would convert into the corresponding oxides. The activation energies of the Keggin heteropoly compounds decomposition reaction were calculated with the non-isothermal kinetic study. The results indicated that the decomposition temperature and the decomposition activation energy of CsHPAV(1) increased for about 20 K and 15 kJ mol(-1), respectively, in comparison with those of HPAV(1).
KeywordPhosphomolybdates DTA-TG analysis Thermal decomposition Activation energy
DOI10.1007/s10973-021-11158-7
Language英语
WOS KeywordHETEROPOLY COMPOUNDS ; SELECTIVE OXIDATION ; ACID ; DECOMPOSITION ; STABILITY ; CATALYSTS ; SPECTROSCOPY ; METHACROLEIN
Funding ProjectNational Natural Science Foundation of China[21676277] ; National Key Technology Research and Development Program of China[2017YFA0206803] ; International Partnership Program of Chinese Academy of Sciences[122111KYSB20190060] ; Key Research and Development Program of Hebei Province[20374002D]
WOS Research AreaThermodynamics ; Chemistry
WOS SubjectThermodynamics ; Chemistry, Analytical ; Chemistry, Physical
Funding OrganizationNational Natural Science Foundation of China ; National Key Technology Research and Development Program of China ; International Partnership Program of Chinese Academy of Sciences ; Key Research and Development Program of Hebei Province
WOS IDWOS:000744945700001
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51771
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Lei
Affiliation1.Chinese Acad Sci, Beijing Key Lab Ionic Liquids Clean Proc, Innovat Acad Green Mfg, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yu, Jiayuan,Wang, Lei,Zhang, Guoliang,et al. Effects of V, Cs, and Cu on the thermal behavior of Keggin phosphomolybdates[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2022:10.
APA Yu, Jiayuan,Wang, Lei,Zhang, Guoliang,Yan, Ruiyi,&Li, Chunshan.(2022).Effects of V, Cs, and Cu on the thermal behavior of Keggin phosphomolybdates.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,10.
MLA Yu, Jiayuan,et al."Effects of V, Cs, and Cu on the thermal behavior of Keggin phosphomolybdates".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY (2022):10.
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