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Lin, Lili; Yu, Qiaolin; Peng, Mi; Li, Aowen; Yao, Siyu; Tian, Shuheng; Liu, Xi; Li, Ang; Jiang, Zheng; Gao, Rui; Han, Xiaodong; Li, Yong-Wang; Wen, Xiao-Dong; Zhou, Wu; Ma, Ding
Journal of the American Chemical Society, 2021-Jan-13, 2021-01-13, 20210113, Letnik: 143, Številka: 1Journal Article
Methanol-water reforming is a promising solution for H 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/Al O catalyst. We demonstrate that Ni is atomically dispersed over α-MoC via carbon bridge bonds, forming a Ni -C motif on the carbide surface. Such Ni -C motifs can effectively stabilize the isolated Ni sites over the α-MoC substrate, rendering maximized active site density and high structural stability. In addition, the synergy between Ni -C 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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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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