Atomically Dispersed Ni/α-MoC Catalyst for Hydrogen Production from Methanol/Water. - 文章详情页

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Methanol-water　reforming　is　a　promising　solution　for　H2　production/transportation　in　stationary　and　mobile　hydrogen　applications.　Developing　inexpensive　catalysts　with　sufficiently　high　activity,　selectivity,　and　stability　remains　challenging.　In　this　paper,　nickel-supported　over　face-centered　cubic　(fcc)　phase　α-MoC　has　been　discovered　to　exhibit　extraordinary　hydrogen　production　activity　in　the　aqueous-phase　methanol　reforming　reaction.　Under　optimized　condition,　the　hydrogen　production　rate　of　2%　Ni/α-MoC　is　about　6　times　higher　than　that　of　conventional　noble　metal　2%　Pt/Al2O3　catalyst.　We　demonstrate　that　Ni　is　atomically　dispersed　over　α-MoC　via　carbon　bridge　bonds,　forming　a　Ni1-C
x
　motif　on　the　carbide　surface.　Such　Ni1-C
x
　motifs　can　effectively　stabilize　the　isolated　Ni1　sites　over　the　α-MoC　substrate,　rendering　maximized　active　site　density　and　high　structural　stability.　In　addition,　the　synergy　between　Ni1-C
x
　motif　and　α-MoC　produces　an　active　interfacial　structure　for　water　dissociation,　methanol　activation,　and　successive　reforming　processes　with　compatible　activity.

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[ 1 ] [Lin Lili]Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
[ 2 ] [Yu Qiaolin]Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
[ 3 ] [Peng Mi]Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
[ 4 ] [Li Aowen]School of Physical Sciences and CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing 100049, China
[ 5 ] [Yao Siyu]Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
[ 6 ] [Tian Shuheng]Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
[ 7 ] [Liu Xi]School of Chemistry and Chemical, In-situ Center for Physical Science, Shanghai Jiao Tong University, Shanghai 200240, China
[ 8 ] [Li Ang]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100024, China
[ 9 ] [Jiang Zheng]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
[ 10 ] [Gao Rui]State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
[ 11 ] [Han Xiaodong]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100024, China
[ 12 ] [Li Yong-Wang]State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
[ 13 ] [Wen Xiao-Dong]State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
[ 14 ] [Zhou Wu]School of Physical Sciences and CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing 100049, China
[ 15 ] [Ma Ding]Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China

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