Highly dispersed silicotungstic acid-derived WO3 composited with ZrO2 supported on SBA-15(WZ/SBA-15)as an ordered mesoporous solid acid catalyst was prepared via a facile incipient wetness impregna-tion(IWI)method that active ingredients,ZrO2 and WO3,were impregnated into the channels of SBA-15 simultaneously with a subsequent calcination process.The relationship between catalyst nature and per-formance was explored by high resolution transmission electron microscopy(HRTEM),high-angle annu-lar dark-field scanning transmission electron microscopy(HAADF-STEM),FT-IR,X-ray photoelectron spec-troscopy(XPS),X-ray diffraction(XRD),N2 adsorption-desorption,NH3 temperature-programmed desorp-tion(NH3-TPD),and FT-IR of pyridine adsorption(Py-IR)characterization techniques.The catalytic perfor-mance of W12Z15/SBA-15 is not only greater than that of single component solid acid catalysts,WO3/SBA-15 and ZrO2/SBA-15,but also W12/Z15/SBA-15 prepared by impregnating active ingredients,ZrO2 and WO3,into SBA-15 in sequence.The outstanding performance of W12Z15/SBA-15 is derived from the strong in-teraction between ZrO2 and WO3,which results in more acid sites,and relatively high specific surface area,large pore volume,and ordered mesoporous structure of SBA-15.The characterization and reaction results clearly demonstrate that the synergy of ZrO2 and WO3 has a clear boost for the alkenylation.The optimized W12Z15/SBA-15-500 achieves a 99.4％conversion of phenylacetylene and a 92.3％selectivity of main product α-arylstyrene for the alkenylation of p-xylene with phenylacetylene,with very low level of oligomers producing at the same time.Moreover,W12Z15/SBA-15-500 shows excellent catalytic stability and regeneration.Therefore,W12Z15/SBA-15-500 is a promising solid acid catalyst for the alkenylation.

Xueting Bai;Yongle Guo;Zhongkui Zhao

State Key Laboratory of Fine Chemicals,Department of Catalysis Chemistry and Engineering,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China

中国化学快报（英文版）

[1]Xueting Bai;Yongle Guo;Zhongkui Zhao-.Silicotungstic acid-derived WO3 composited with ZrO2 supported on SBA-15 as a highly efficient mesoporous solid acid catalyst for the alkenylation of p-xylene with phenylacetylene)[J].中国化学快报（英文版）,2022(03):1325-1330

Silicotungstic,alkenylation,phenylacetylene,silicotungstic,impregna,W12Z15,impregnating,arylstyrene

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