Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, 421 Washington Avenue SE, Minneapolis, MN, 55455, USA.
State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, Liaoning Province, China.
X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA.
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA.
Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD, 21218, USA.
八面沸石 (FAU) 沸石（Si/Al 比约为 1.7）在中等离子交换条件（0.01 至 0.6 M 的 NH 4 NO 3溶液）下进行温和的脱铝，导致被方钠石笼包围的质子变得可用于反应。方钠石笼 (H SOD ) 与超级笼 (H SUP )中质子的比例可以通过调整离子交换中使用的铵浓度来控制。
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Enhanced Reactivity of Accessible Protons in Sodalite Cages of Faujasite Zeolite
Faujasite (FAU) zeolites (with Si/Al ratio of ca. 1.7) undergo mild dealumination at moderate ion exchange conditions (0.01 to 0.6 M of NH4NO3 solutions) resulting in protons circumscribed by sodalite cages becoming accessible for reaction. The ratio of protons in sodalite cages (HSOD) to supercages (HSUP) can be manipulated by adjusting ammonium concentrations used in ion exchange.
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