Catalytic Activities of Transition Metal Phosphides for NO Dissociation and Reduction With CO

Chemical and biochemical engineering quarterly

Y. Zhao¹  X. Qiao¹  Z. Yao¹  Y. Shi¹  D. Liu¹ 

关键词: Fe2P;    NO reduction;    NO dissociation;    catalytic redox cycle;    bulk oxidation;   

DOI  :  10.15255/CABEQ.2014.2133

来源: Croatian Society of Chemical Engineers

【 摘 要 】

Abstract A series of metal phosphides (MoP, WP, Co2P, Fe2P and Ni2P) were synthesized by H2-temperature-programmed reduction method. Amongst these phosphides, Fe2P was found to show a considerably higher activity for NO dissociation than other phosphides. Herein, it was firstly used as a catalyst for NO reduction with CO. Although the Fe2P catalyst showed an excellent activity for NO conversion to N2, there was a competition between NO reduction by CO and Fe2P oxidation by oxygen originated from NO dissociation. A complete equality of NO conversion and NO reduction degree can be obtained after increasing CO concentration in the system, which demonstrated that a catalytic redox cycle can be established on Fe2P catalyst, and hence in-situ oxidation of bulk Fe2P was avoided.

【 授权许可】

Unknown