Regeneration of copper catalysts mediated by molybdenum-based oxides

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Cu catalysts,known for their unparalleled catalytic capabilities due to their unique electronic structure,have faced inherent challenges in maintaining long-term effectiveness under harsh hydrogenation con-ditions.Here,we demonstrate a molybdenum-mediated redispersion behavior of Cu under high-temperature oxidation conditions.The oxidized Cu nanoparticles with rich metal-support interfaces tend to dissolve into the MoO3 support upon heating to 600 ℃,which facilitates the subsequent regeneration in a reducing atmosphere.A similar redispersion phenomenon is observed for Cu nanoparticles supported on ZnO-modified MoO3.The modification of ZnO significantly improves the performance of the Cu cata-lyst for CO2 hydrogenation to methanol,with the high activity being well maintained after four repeated oxidation-reduction cycles.In situ spectroscopic and theoretical analyses suggest that the interaction involved in the formation of the copper molybdate-like compound is the driving force for the redispersion of Cu.This method is applicable to various Mo-based oxide supports,offering a practical strategy for the regeneration of sintered Cu particles in hydrogenation applications.

外文关键词：

Cu-based catalystsAggregationRegenerationOxidationCO2 hydrogenation

作者：

Changyu Ding、Xiaoli Pan、Isla E.Gow、Xia Wu、Hongchen Cao、Zhounan Yu、Xiaoyan Liu、Xiaofeng Yang、Qinggang Liu、Yanqiang Huang

展开 >

作者单位：

CAS Key Laboratory of Science and Technology on Applied Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China

University of Chinese Academy of Sciences,Beijing 100049,China

Cardiff Catalysis Institute,School of Chemistry,Translational Research Hub,Cardiff University,Cardiff CF24 4HQ,United Kingdom

College of Chemistry,Chemical Engineering and Resource Utilization,Northeast Forestry University,Harbin 150040,Heilongjiang,China

展开 >

基金：

National Key Research and Development Program of ChinaCAS Project for Young Scientists in Basic ResearchNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaWelsh Government funded Taith Research Mobility Programme

项目编号：

2021YFB4000700YSBR-0222200813621925803524339

出版年：

2024

DOI：

10.1016/j.jechem.2024.04.007

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.95(8)