Subject Area物理化学
Mechanism of fast hydrogen generation from pure water using Al-SnCl2 and bi-doped Al-SnCl2 composites
Xu, Fen1; Sun, Lixian1; Lan, Xiaofen2; Chu, Hailiang1; Sun, Yujia4; Zhou, Huaiying1; Li, Fen3; Yang, Lini5; Si, Xiaoliang3; Zhang, Jian3; Walter, Serge6; Gabelica, Zelimir6; Sun LX(孙立贤)
KeywordAl-sncl2 Composite Bi-doped Al-sncl2 Composite Mechanism Of Hydrogen Generation Fast Hydrogen Production From Water
Indexed BySCI
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels
AbstractThe mechanism of fast hydrogen generation from pure water using selectively activated Al-SnCl2 composites was elucidated with the help of experimental data using combined XRD, SEM, EDX, DSC and calorimetric techniques. It is found that H-2 is produced from two different but simultaneous routes specific to the Al-SnCl2 composite stoichiometry achieved after ball milling the precursor that readily yields, besides the excess of Al, Sn and AlCl3. Hydrogen is simultaneously produced from the reaction of the so-formed Al-Sn alloy with water, and from the reaction of the in situ generated AlCl3 with water, yielding HCl (protons) that further again react with Al, both reactions significantly increasing the hydrogen production rate. The effect of Bi on the hydrogen conversion yield on the Al-SnCl2 composite was also investigated. The electrochemical activity of Al is further enhanced by doping Bi into Al-SnCl2 composite. Meanwhile, DFT (density functional theory) calculations show that Bi micro domains present onto the Al (111) crystallite faces of the composite significantly reduce the adsorption energy of the OH groups while, Mg- or Cr-doped Al-SnCl2 composites increase this adsorption energy. The Mulliken charge analysis indicates that Bi leads to less electron transport between Al and O atoms (weaker interaction) than pristine Al (111) surface. Bi therefore contributes to inhibit the formation of the hydroxyls on the Al metal surface, thereby allowing the clean metal to continuously react with water. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
WOS IDWOS:000334977900004
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorSun LX(孙立贤)
Affiliation1.Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Peoples R China
2.Liaoning Normal Univ, Coll Chem & Chem Engn, Dalian 116029, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China
4.Texas A&M Univ, College Stn, TX 77843 USA
5.Liaoning Univ, Coll Chem, Senyang 110036, Peoples R China
6.Univ Haute Alsace, ENSCMu, Lab LPI GSEC, F-68093 Mulhouse, France
Recommended Citation
GB/T 7714
Xu, Fen,Sun, Lixian,Lan, Xiaofen,et al. Mechanism of fast hydrogen generation from pure water using Al-SnCl2 and bi-doped Al-SnCl2 composites[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2014,39(11):5514-5521.
APA Xu, Fen.,Sun, Lixian.,Lan, Xiaofen.,Chu, Hailiang.,Sun, Yujia.,...&孙立贤.(2014).Mechanism of fast hydrogen generation from pure water using Al-SnCl2 and bi-doped Al-SnCl2 composites.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,39(11),5514-5521.
MLA Xu, Fen,et al."Mechanism of fast hydrogen generation from pure water using Al-SnCl2 and bi-doped Al-SnCl2 composites".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 39.11(2014):5514-5521.
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