Active Complexes on Engineered Crystal Facets of MnOx-CeO2 and Scale-Up Demonstration on an Air Cleaner for Indoor Formaldehyde Removal

doi:10.1021/acs.est.9b03197

IEECAS OpenIR > 粉尘与环境研究室

	Active Complexes on Engineered Crystal Facets of MnOx-CeO2 and Scale-Up Demonstration on an Air Cleaner for Indoor Formaldehyde Removal
	Li, Haiwei 1; Ho, Wingkei 2,3; Cao, Junji 4,5; Park, Duckshin 6; Lee, Shun-cheng 1; Huang, Yu 4,5
通讯作者	Lee, Shun-cheng(ceslee@polyu.edu.hk) ; Huang, Yu(huangyu@ieecas.cn)
	2019-09-17
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
卷号	53 期号:18 页码:10906-10916
摘要	Crystal facet-dominated surfaces determine the formation of surface-active complexes, and engineering specific facets is desirable for improving the catalytic activity of routine transition-metal oxides that often deactivate at low temperatures. Herein, MnOx-CeO2 was synthetically administered to tailor the exposure of three major facets, and their distinct surface-active complexes concerning the formation and quantitative effects of oxygen vacancies, catalytically active zones, and active-site behaviors were unraveled. Compared with two other low-index facets {110} and {001}, MnOx-CeO2 with exposed {111} facet showed higher activity for formaldehyde oxidation and CO2 selectivity. However, the {110} facet did not increase activity despite generating additional oxygen vacancies. Oxygen vacancies were highly stable on the {111} facet, and its bulk lattice oxygen at high migration rates could replenish the consumption of surface lattice oxygen, which was associated with activity and stability. High catalytically active regions were exposed at the {111}-dominated surfaces, wherein the predominated Lewis acid-base properties facilitated oxygen mobility and activation. The mineralization pathways of formaldehyde were examined by a combination of in situ X-ray photoemission spectroscopy and diffuse reflectance infrared Fourier transform spectrometry. The MnOx-CeO2-111 catalysts were subsequently scaled up to work as filter substrates in a household air cleaner. In in-field pilot tests, 8 h of exposure to an average concentration of formaldehyde after start-up of the air cleaner attained the Excellent Class of Indoor Air Quality Objectives in Hong Kong.
DOI	10.1021/acs.est.9b03197
关键词[WOS]	ROOM-TEMPERATURE OXIDATION ; CATALYTIC-OXIDATION ; MANGANESE ; SURFACE ; OXIDE ; CO ; HCHO ; NANOCRYSTALS ; PERFORMANCE ; COMBUSTION
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of China[2016YFA0203000] ; Research Grants Council of Hong Kong Government[PolyU152083/14E] ; Research Grants Council of Hong Kong Government[PolyU152090/15E] ; Research Grants Council of Hong Kong Government[18301117] ; Research Grants Council of Hong Kong Government[T24/504/17] ; Hong Kong RGC Collaborative Research Fund[C5022-14G] ; Hundred Talent Program of the Chinese Academy of Sciences
WOS研究方向	Engineering ; Environmental Sciences & Ecology
项目资助者	National Key Research and Development Program of China ; Research Grants Council of Hong Kong Government ; Hong Kong RGC Collaborative Research Fund ; Hundred Talent Program of the Chinese Academy of Sciences
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000487163000041
出版者	AMER CHEMICAL SOC
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13281
专题	粉尘与环境研究室
通讯作者	Lee, Shun-cheng; Huang, Yu
作者单位	1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China 2.Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Peoples R China 3.City Univ Hong Kong, State Key Lab Marine Pollut, Hong Kong, Peoples R China 4.Chinese Acad Sci, SKLLQG, Xian 710061, Shaanxi, Peoples R China 5.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China 6.Korea Railrd Res Inst, Transportat Environm Res Team, Gyeonggi Do 16105, South Korea
推荐引用方式 GB/T 7714	Li, Haiwei,Ho, Wingkei,Cao, Junji,et al. Active Complexes on Engineered Crystal Facets of MnOx-CeO2 and Scale-Up Demonstration on an Air Cleaner for Indoor Formaldehyde Removal[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(18):10906-10916.
APA	Li, Haiwei,Ho, Wingkei,Cao, Junji,Park, Duckshin,Lee, Shun-cheng,&Huang, Yu.(2019).Active Complexes on Engineered Crystal Facets of MnOx-CeO2 and Scale-Up Demonstration on an Air Cleaner for Indoor Formaldehyde Removal.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(18),10906-10916.
MLA	Li, Haiwei,et al."Active Complexes on Engineered Crystal Facets of MnOx-CeO2 and Scale-Up Demonstration on an Air Cleaner for Indoor Formaldehyde Removal".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.18(2019):10906-10916.