固体核磁共振技术研究金属氧化物类固体酸催化剂的酸碱性

陈欣,付颖懿,岳斌,贺鹤勇

Acidity and Basicity of Solid Acid Catalysts Studied by Solid-State NMR

Xin CHEN,Ying-yi FU,Bin YUE,He-yong HE

表2 采用TMP或13CO2单吸附及两者共吸附方法得到的催化剂酸碱位密度[45]

Table 2 Acid and base density of the catalysts characterized by the NMR techniques via sole adsorption or co-adsorption of TMP and13CO2[45]

催化剂 吸附模式 碱密度/(μmol·g-1) 酸密度/(μmol·g-1) 强 中等 弱 总量 Lewis酸 Brønsted酸 总量 MgO 单吸附 - 10.5 - 10.5 - - - 共吸附 3.6 6.9 6.7 17.2 15.8 - 15.8 ZrO2 单吸附 0.1 8.9 6.0 15.0 108.5 2.8 111.3 共吸附 0.8 13.0 6.0 19.8 65.0 10.8 75.8 Al2O3 单吸附 - 4.2 36.6 40.8 220.1 25.9 246.0 共吸附 - 4.2 53.6 57.8 175.9 102.3 278.2