燃料化学学报（中英文）2024，Vol.52Issue(1)：47-54,8.DOI:10.1016/S1872-5813(23)60379-2
Cu-Al尖晶石氧化物缓释催化剂表面重构对促进甲醇重整反应性能的研究
Cu-Al spinel oxide as a sustained release catalyst for methanol steam reforming:Enhancing the catalytic performance via surface reconstruction
摘要
Abstract
Cu-Al spinel oxide as a sustained release catalyst gradually releases active metal Cu during the methanol steam reforming reaction,whose catalytic behavior depends strongly on the surface structure of the catalyst.In this context,Cu-Al spinel solid solution is synthesized by a solid phase ball milling method,followed by treating with acidic and basic solutions in order to modulate the surface composition and structure,thereby to further improve the catalytic performance.Nitric acid is effective for the removal of both surface dispersed Cu and Al oxide species,whereas sodium hydroxide is only effective for the removal of Al oxide species,and ammonium hydroxide shows the weakest effect,removing a very small amount of Cu and Al species.Accompanying with the loss of Cu and Al species,the catalyst surface undergoes structural reconstruction,showing a redistribution of Cu species.Consequently,the copper releasing behavior varies drastically.The catalytic testing results show that the nitric acid and ammonium hydroxide treated catalysts present improved activity,where in the former also shows better stability.Sodium hydroxide treatment has a negative effect on the sustained releasing catalytic performance.In combination with the characterization results of the tested catalysts,it is found that both the copper particle dimension and the microstructure strain of sustained released copper play important roles in the catalytic performance.The findings of this report provide a practical method for the improvement of the sustained releasing catalysis.关键词
Cu-Al尖晶石/表面修饰/表面重构/甲醇重整Key words
Cu-Al spinel/surface modification/surface reconstruction/methanol steam reforming分类
化学化工引用本文复制引用
侯晓宁,庆绍军,刘雅杰,张磊,高志贤..Cu-Al尖晶石氧化物缓释催化剂表面重构对促进甲醇重整反应性能的研究[J].燃料化学学报（中英文）,2024,52(1):47-54,8.基金项目
The project was supported by the Fundamental Research Program(Free Exploration)of Shanxi Province of China(20210302124338,20210302123358)and the Postdoctoral program of Administrative Committee of Taiyuan Economic Development Zone.山西省基础研究计划(自由探索类)(20210302124338,20210302123358)和太原经济开发区管理委员会博士后工作站资助 （Free Exploration）
