采用 XRD,TPD和高温原位 IR光谱对 La2 O3,Ba O/La2 O3,Ba F2 /La2 O3,La OF和 Ba F2 /La OF等催化剂的组成、结构和 CO2 在催化剂上的吸附状况进行了表征 ,并结合催化剂性能评价结果对该系列催化剂的碱性及其与 OCM反应性能的关系进行了考察 .结果表明 ,催化剂 OCM反应性能与其酸碱性的强弱无简单的对应关系 The structure, structure and adsorption of CO2 on the catalyst were investigated by XRD, TPD and high temperature in-situ IR spectroscopy on the catalysts La2O3, BaO / La2O3, Ba F2 / La2O3, LaOF and Ba F2 / LaOF , And the relationship between the basicity of the series of catalysts and the reaction performance of OCM were also investigated in combination with the evaluation results of the catalyst performance.The results show that there is no simple correspondence between the performance of the OCM catalyst and the acidity and basicity