With XRD test, the results show added CeO_2 , the catalyst produces NiAl_2O_4 spinel, which enhances the ability of the catalyst against deposited carbon.

• XRD测试结果表明,添加CeO2后的催化剂生成了NiAl2O4尖晶石,这有助于催化剂的抗积炭性能。