Well-Dispersed Ruthenium in Mesoporous Crystal TiO2 as an Advanced Electrocatalyst for Hydrogen Evolution Reaction - 文章详情页

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TiO2　mesoporous　crystal　has　been　prepared　by　one-step　corroding　process　via　an　oriented　attachment　(OA)　mechanism　with　SrTiO3　as　precursor.　High　resolution　transmission　electron　microscopy　(HRTEM)　and　nitrogen　adsorption　desorption　isotherms　confirm　its　mesoporous　crystal　structure.　Well-dispersed　ruthenium　(Ru)　in　the　mesoporous　nanocrystal　TiO2　can　be　attained　by　the　same　process　using　Ru-doped　precursor　SrTi1-xRuxO3.　Ru　is　doped　into　lattice　of　TiO2,　which　is　identified　by　HRTEM　and　super　energy　dispersive　spectrometer　(super-EDS)　elemental　mapping.　X-ray　photoelectron　spectroscopy　(XPS)　and　electron　paramagnetic　resonance　spectroscopy　(EPR)　suggest　the　pentavalent　Ru　but　not　tetravalent,　while　partial　Ti　in　TiO2　accept　an　electron　from　Ru　and　become　Ti3+,　which　is　observed　for　the　first　time.　This　Ru-doped　TiO2　performs　high　activity　for　electrocatalytic　hydrogen　evolution　reaction　(HER)　in　alkaline　solution.　First　principles　calculations　simulate　the　HER　process　and　prove　TiO2:Ru　with　Ru5+　and　Ti3+　holds　high　HER　activity　with　appropriate　hydrogen-adsorption　Gibbs　free　energies　(Delta　G(H)).

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作者机构：

[ 1 ] [Nong, Shuying]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[ 2 ] [Dong, Wujie]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[ 3 ] [Dong, Bowei]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[ 4 ] [Yuan, Xiaotao]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[ 5 ] [Wang, Xin]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[ 6 ] [Jiang, Shangda]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[ 7 ] [Huang, Fuqiang]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[ 8 ] [Bu, Kejun]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[ 9 ] [Huang, Fuqiang]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[ 10 ] [Yin, Junwen]Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
[ 11 ] [Chen, Mingyang]Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
[ 12 ] [Liu, Li-Min]Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
[ 13 ] [Liu, Li-Min]Beihang Univ, Sch Phys, Beijing 100191, Peoples R China
[ 14 ] [Lu, Yue]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
[ 15 ] [Sui, Manling]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China

通讯作者信息：

隋曼龄
[Huang, Fuqiang]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China;;[Huang, Fuqiang]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China;;[Liu, Li-Min]Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China;;[Liu, Li-Min]Beihang Univ, Sch Phys, Beijing 100191, Peoples R China;;[Sui, Manling]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China

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liminliu@buaa.edu.cn |
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huangfq@pku.edu.cn

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