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In-situ growth of heterophase Ni nanocrystals on graphene for enhanced catalytic reduction of 4-nitrophenol

文献类型：期刊论文

作者Zhuang, Jiahao1,2; He, Feng3; Liu, Xianglin4; Si, Pengchao1,2; Gu, Fangna2; Xu, Jing4; Wang, Yu2; Xu, Guangwen3; Zhong, Ziyi5,6; Su, Fabing2,3
刊名NANO RESEARCH
出版日期2021-07-09
页码8
ISSN号1998-0124
关键词heterophase structure Ni nanocrystals graphene 4-nitrophenol (4-NP) reduction catalysts
DOI10.1007/s12274-021-3630-6
英文摘要Generating heterophase structures in nanomaterials, e.g., heterophase metal nanocrystals, is an effective way to tune their physicochemical properties because of their high-energy nature and unique electronic environment of the generated interfaces. However, the direct synthesis of heterophase metal nanocrystals remains a great challenge due to their unstable nature. Herein, we report the in situ and direct synthesis of heterophase Ni nanocrystals on graphene. The heterostructure of face-centered cubic (fcc) and hexagonal close-packed (hcp) phase was generated via the epitaxial growth of hcp Ni and the partial transformation of fcc Ni and stabilized by the anchoring effect of graphene toward fcc Ni nanocrystal and the preferential adsorption of surfactant polyethylenimine (PEI) toward epitaxial hcp Ni. Comparing with the fcc Ni nanocrystals grown on graphene, the heterophase (fcc/hcp) Ni nanocrystals in situ grown on graphene showed a greatly improved catalytic activity and reusability in 4-nitrophenol (4-NP) reduction to 4-aminophenol (4-AP). The measured apparent rate constant and the activity parameter were 2.958 min(-1) and 102 min(-1)center dot mg(-1), respectively, higher than that of the best reported non-noble metal catalysts and most noble metal catalysts. The control experiments and density functional theory calculations reveal that the interface of the fcc and hcp phases enhances the adsorption of substrate 4-NP and thus facilitates the reaction kinetics. This work proves the novel idea for the rational design of heterophase metal nanocrystals by employing the synergistic effect of surfactant and support, and also the potential of creating the heterostructure for enhancing their catalytic reactivity.
WOS关键词GENERALIZED GRADIENT APPROXIMATION ; TOTAL-ENERGY CALCULATIONS ; HIGHLY-ACTIVE CATALYST ; PHASE-TRANSFORMATION ; NANOPARTICLES ; NANOSTRUCTURES ; HYDROGENATION ; NANOSHEETS ; CORE
资助项目National Natural Science Foundation of China[21776286] ; Guangdong Key Discipline Fund
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
出版者TSINGHUA UNIV PRESS
WOS记录号WOS:000671788900002
资助机构National Natural Science Foundation of China ; Guangdong Key Discipline Fund
源URL[http://ir.ipe.ac.cn/handle/122111/49341]  
专题中国科学院过程工程研究所
通讯作者Gu, Fangna; Zhong, Ziyi; Su, Fabing
作者单位1.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Shenyang Univ Chem Technol, Key Lab Resources Chem & Mat, Minist Educ, Shenyang 110142, Peoples R China
4.East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China
5.Guangdong Technion Israel Inst Technol GTIIT, Dept Chem Engn, Shantou 515063, Peoples R China
6.Technion Israel Inst Technol IIT, IL-32000 Haifa, Israel
推荐引用方式
GB/T 7714		 Zhuang, Jiahao,He, Feng,Liu, Xianglin,et al. In-situ growth of heterophase Ni nanocrystals on graphene for enhanced catalytic reduction of 4-nitrophenol[J]. NANO RESEARCH,2021:8.
APA Zhuang, Jiahao.,He, Feng.,Liu, Xianglin.,Si, Pengchao.,Gu, Fangna.,...&Su, Fabing.(2021).In-situ growth of heterophase Ni nanocrystals on graphene for enhanced catalytic reduction of 4-nitrophenol.NANO RESEARCH,8.
MLA Zhuang, Jiahao,et al."In-situ growth of heterophase Ni nanocrystals on graphene for enhanced catalytic reduction of 4-nitrophenol".NANO RESEARCH (2021):8.

入库方式： OAI收割

来源：过程工程研究所

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