The variations of catalysts after reaction and the deposited carbon over the catalysts were analyzed and characterized by XPS, TEM and TG-DTG etc.

• 本论文运用XPS、TEM、TG-DTG等物理化学方法对反应后催化剂的变化及其积碳进行了分析和表征。 结果表明，催化剂失活的主要原因是催化剂积碳。