Atomic-Scale Observation of Bimetallic Au-CuOx Nanoparticles and Their Interfaces for Activation of CO Molecules

doi:10.1021/acsami.9b12017

IMR OpenIR

	Atomic-Scale Observation of Bimetallic Au-CuOx Nanoparticles and Their Interfaces for Activation of CO Molecules
	Luo, Jingjie 1,2; Liu, Yuefeng 3; Zhang, Liyun 4,5; Ren, Yujing 3; Miao, Shu 3; Zhang, Bingsen 4; Su, Dang Sheng 3; Liang, Changhai 1,2
通讯作者	Liang, Changhai(changhai@dlut.edu.cn)
	2019-09-25
发表期刊	ACS APPLIED MATERIALS & INTERFACES
ISSN	1944-8244
卷号	11 期号:38 页码:35468-35478
摘要	Supported gold nanoparticles with sizes below 5 nm display attractive catalytic activities for heterogeneous reactions, particularly those promoted by secondary metal (e.g., Cu) because of the well-defined synergy between metal compositions. However, the specific atomic structure at interfaces is less interpreted systematically. In this work, various bimetallic Au-CuOx catalysts with specific surface structures were synthesized and explored by aberration-corrected scanning transmission electron microscopy (AC-STEM), temperature-programmed experiments and in situ DRIFT experiments. Results suggest that the atomic structure and interfaces between gold and CuOx a are determined by the nucleation behaviors of the nanoparticles and result in subsequently the distinctive ability for CO activation. Bimetallic CuO/Au sample formatted by gold particles surrounded with CuOx nanoclusters have rough surface with prominently exposed low-coordinated Au step defects. Whereas the bimetallic Au@CuO sample formatted by copper precursor in the presence of gold nanoparticles have core-shell structure with relatively smooth surface. The former structure of CuO/Au displays much accelerated properties for CO adsorption and activation with 90% CO converted to CO2 at 90 degrees C and nice stability with time on stream. The results clearly determine from atomic scale the significance of exposed gold step sites and intrinsic formation of defected surface by different nucleation. The above properties are directly responsible for the induced variation in chemical composition and the catalytic activity.
关键词	Au catalysis Au-Cu bimetallic particles defect-enriched surface step sites CO activation
资助者	National Natural Science Foundation of China ; Program for Excellent Talents in Dalian City ; Fundamental Research Funds for the Central Universities ; CAS Youth Innovation Promotion Association
DOI	10.1021/acsami.9b12017
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[21573031] ; National Natural Science Foundation of China[21802015] ; National Natural Science Foundation of China[21872144] ; Program for Excellent Talents in Dalian City[2016RD09] ; Program for Excellent Talents in Dalian City[2016RD04] ; Fundamental Research Funds for the Central Universities[DUT15ZD106] ; CAS Youth Innovation Promotion Association[2018220]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000488322900102
出版者	AMER CHEMICAL SOC
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/135731
专题	中国科学院金属研究所
通讯作者	Liang, Changhai
作者单位	1.Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Panjin Campus, Panjin 124221, Peoples R China 2.Dalian Univ Technol, Sch Chem Engn, Lab Adv Mat & Catalyt Engn AMCE, Panjin Campus, Panjin 124221, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy DNL, 457 Zhongshan Rd, Dalian 116023, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci SYNL, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 5.Qufu Normal Univ, Dept Chem Engn, Qufu 273165, Peoples R China
推荐引用方式 GB/T 7714	Luo, Jingjie,Liu, Yuefeng,Zhang, Liyun,et al. Atomic-Scale Observation of Bimetallic Au-CuOx Nanoparticles and Their Interfaces for Activation of CO Molecules[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(38):35468-35478.
APA	Luo, Jingjie.,Liu, Yuefeng.,Zhang, Liyun.,Ren, Yujing.,Miao, Shu.,...&Liang, Changhai.(2019).Atomic-Scale Observation of Bimetallic Au-CuOx Nanoparticles and Their Interfaces for Activation of CO Molecules.ACS APPLIED MATERIALS & INTERFACES,11(38),35468-35478.
MLA	Luo, Jingjie,et al."Atomic-Scale Observation of Bimetallic Au-CuOx Nanoparticles and Their Interfaces for Activation of CO Molecules".ACS APPLIED MATERIALS & INTERFACES 11.38(2019):35468-35478.