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题名: Small-sized Ni(111) particles in metal-organic frameworks with low over-potential for visible photocatalytic hydrogen generation
其他题名: Small-sized Ni(1 1 1) particles in metal-organic frameworks with low over-potential for visible photocatalytic hydrogen generation
作者: Zhen, WL; Ma, JT(马建泰); Lu, GX
收录类别: SCIE ; EI
出版日期: 2016-08-05
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
卷号: 190, 页码:12-25
出版者: ELSEVIER
出版地: AMSTERDAM
英文摘要: The development of an advanced co-catalyst is critical for improving the efficiency of the photocatalytic hydrogen evolution reaction. Noble metals (such as Pt) have been identified to be the most active co-catalyst for this reaction since they exhibit significantly low over-potential. However, their low-abundance, high cost, its scale-up setup usage is impeditive. Here, we reported that high efficient small-sized nickel particles embedded in the frameworks of MOF-5 as a co-catalyst with low over potential for visible photocatalytic hydrogen evolution. The electrochemical measurements showed a low over-potential of -0.37 V, which have the similar over-potential as Pt@MOF-5. Such low over-potential is attributed to their high dispersion (41.8%), small-sized nickel particles (similar to 9 nm), and high specific surface area of MOF-5 (2973 m(2)/g). As evidenced by electrochemical impedance spectra (EIS) measurements, Ni nanoparticles with exposed (11 1) facet were more benefited the electrons transfer from MOF-5 than that of (2 0 0) facet one. In addition, Ni@MOF-5 exhibited the larger transient photocurrent and longer fluorescence lifetime. These results led to the high photocatalytic activities and stability for hydrogen evolution sensitized by Eosin Y (EY) over Ni@MOF-5. The rate of hydrogen evolution reached 30.22 mmol h(-1) g(-1)[Ni] (at pH 11) over Ni@MOF-5 irradiated under visible light irradiation (lambda >= 420 nm) in 2 h. The apparent quantum efficiency (AQE) of 16.7% over EY-Ni@MOF-5 was achieved at 430 nm. MOF-5 might promote the photogenerated electrons transfer from excited EY to the hydrogen evolution active sites (Ni), and consequently enhance photocatalytic hydrogen evolution efficiency. (C) 2016 Elsevier B.V. All rights reserved.
关键词: Small-sized Ni(111) particles ; Metal-organic frameworks ; Low over-potential ; Visible photocatalytic hydrogen generation
作者部门: [Zhen, Wenlong ; Lu, Gongxuan] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China ; [Zhen, Wenlong ; Ma, Jiantai] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
通讯作者: Lu, GX (reprint author), Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China.
学科分类: Chemistry; Engineering
文章类型: Article
所属项目编号: 973 Program of Department of Sciences and Technology China [2013CB632404] ; National Natural Science Foundation of China [21433007, 21373245]
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
项目资助者: NSFC ; MOST
语种: 英语
DOI: 10.1016/j.apcatb.2016.02.061
ISSN号: 0926-3373
WOS记录号: WOS:000374604900002
EI记录号: 20161102093256
IR记录号: WOS:000374604900002
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/180535
Appears in Collections:化学化工学院_期刊论文

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Recommended Citation:
Zhen, WL,Ma, JT,Lu, GX. Small-sized Ni(111) particles in metal-organic frameworks with low over-potential for visible photocatalytic hydrogen generation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2016,190:12-25.
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