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Ru-Cluster-Modified Ni Surface Defects toward Selective Bond Breaking between C-O and C-C
Chen, H; He, S; Cao XZ(曹兴忠); Cao, XZ; Zhang, ST; Xu, M; Pu, M; Su, DS; Wei, M; Evans, DG; Duan, X
2016
发表期刊CHEMISTRY OF MATERIALS
卷号28期号:13页码:4751-4761
摘要For catalytic processes involving multiple reaction pathways such as the ethanol steam reforming (ESR), tailoring the active site structure of catalysts to achieve the desired catalytic selectivity is of vital importance and remains a challenge. Here, we report a heterogeneous Ru-Ni catalyst by anchoring Ru clusters onto the defect sites of Ni nanoparticles. The resulting strained Ru-Ni interface shows a high activity toward the C-C bond cleavage that is essentially required for hydrogen production via ESR. The C-O bond rupture in the side reaction (methanation) is significantly inhibited. This results in an extremely high H2 yield of 4.2 molH2/molEtOH at 350 degrees C, superior to the previously reported ESR catalysts working at medium-low temperature (300-500 degrees C). An experimental-computational combination study verifies that the conversion of Ni surface defects to the Ru-Ni interface plays a decisive role in the remarkably improved H2 yield. This work demonstrates an effective strategy to largely enhance the bond-breaking selectivity via tuning the active site structure at the catalyst surface/interface.
文章类型期刊论文
DOI10.1021/acs.chemmater.6b01784
关键词[WOS]H-2 PRODUCTION ; COBALT CATALYSTS ; METAL-SURFACES ; FE-CU ; REACTIVITY ; STABILITY ; HYDROGEN ; ETHANOL ; DECOMPOSITION ; NANOCRYSTALS
语种英语
WOS类目Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号WOS:000379704100027
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260278
专题多学科研究中心
作者单位中国科学院高能物理研究所
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Chen, H,He, S,Cao XZ,et al. Ru-Cluster-Modified Ni Surface Defects toward Selective Bond Breaking between C-O and C-C[J]. CHEMISTRY OF MATERIALS,2016,28(13):4751-4761.
APA Chen, H.,He, S.,曹兴忠.,Cao, XZ.,Zhang, ST.,...&Duan, X.(2016).Ru-Cluster-Modified Ni Surface Defects toward Selective Bond Breaking between C-O and C-C.CHEMISTRY OF MATERIALS,28(13),4751-4761.
MLA Chen, H,et al."Ru-Cluster-Modified Ni Surface Defects toward Selective Bond Breaking between C-O and C-C".CHEMISTRY OF MATERIALS 28.13(2016):4751-4761.
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