中国石油大学学报（自然科学版）2025，Vol.49Issue(3)：223-231,9.DOI:10.3969/j.issn.1673-5005.2025.03.024
氧化铈纳米棒负载钯-钴双金属催化甲烷氧化
Methane oxidation catalyzed by Pd-Co bimetallic species supported on CeO2 nanorods
摘要
Abstract
Ceria nanorods(CeO2-R)support was prepared by the hydrothermal synthesis method And a self-developed gas film-assisted reduction device was used to achieve uniform reduction of metal precursors and highly dispersed Pd-Co bimetal-lic alloy on CeO2-R by controlling the gas diffusion rate and the concentration of reducing agent,as well as the Pd-Co/CeO2-R deep oxidation catalyst was constructed.By adjusting the proportion of Pd-Co bimetallic alloy,the distribution of ox-ygen vacancies on the surface of CeO2-R was optimized,so as to improve the adsorption and activation ability of the catalyst for oxygen and methane,and then promote the adsorption and activation ability of the catalyst for oxygen and methane.The reaction mechanism of Pd-Co/CeO2-R catalyst for the oxidation of low-concentration methane was analyzed.The results show that the 1.5%Pd-0.5%Co/CeO2-R catalyst exhibits high catalytic activity for the low-concentration methane oxidation.Compared with the CeO2 support,the loading Pd-Co nanoparticles on the surface of CeO2 nanorods can further improve the catalytic activity for the low-concentration methane oxidation.The Pd-Co alloy catalyst on the surface of CeO2 nanorods forms a strong metal-oxide interaction during the loading process of the catalyst.This interaction can significantly improve the ad-sorption and activation performance of the catalyst for molecular oxygen,which is conducive to the generation of active oxygen species.关键词
甲烷/氧化/氧化铈/纳米棒/双金属Key words
methane/oxidation/cerium oxide/nanorod/bimetallic分类
化学化工引用本文复制引用
熊靖,孙彦,马亚肖,徐琳盛,韦岳长..氧化铈纳米棒负载钯-钴双金属催化甲烷氧化[J].中国石油大学学报（自然科学版）,2025,49(3):223-231,9.基金项目
国家自然科学基金项目(22208373,22376217) （22208373,22376217）
国家重点研发计划项目(2022YFB3506200,2022YFB3504100,2021YFA1501304) （2022YFB3506200,2022YFB3504100,2021YFA1501304）
中国石油大学(北京)科学基金项目(2462023YJRC030) （北京）
