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Facet-dependent Catalysis of CuNi Nanocatalysts toward 4–Nitrophenol Reduction Reaction

Published online by Cambridge University Press:  09 January 2020

Can Li ,
Yiliang Luan ,
Bo Zhao ,
Amar Kumbhar ,
Xiaobo Chen ,
David Collins ,
Guangwen Zhou  and
Jiye Fang Open the ORCID record for Jiye Fang [Opens in a new window]
Can Li
Affiliation:
Department of Chemistry, State University of New York at Binghamton, New York, USA.
Yiliang Luan
Affiliation:
Department of Chemistry, State University of New York at Binghamton, New York, USA.
Bo Zhao
Affiliation:
College of Arts & Sciences Microscopy, Texas Tech University, Texas, USA.
Amar Kumbhar
Affiliation:
Chapel Hill Analytical and Nanofabrication Laboratory, University of North Carolina at Chapel Hill, North Carolina, USA.
Xiaobo Chen
Affiliation:
Materials Science and Engineering Program, State University of New York at Binghamton, New York, USA.
David Collins
Affiliation:
Department of Geological Sciences and Environmental Studies, State University of New York at Binghamton, New York, USA.
Guangwen Zhou
Affiliation:
Materials Science and Engineering Program, State University of New York at Binghamton, New York, USA.
Jiye Fang*
Affiliation:
Department of Chemistry, State University of New York at Binghamton, New York, USA. Materials Science and Engineering Program, State University of New York at Binghamton, New York, USA.
*
*(Email: [email protected])
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Abstract

We report a facile method to fabricate CuNi nano-octahedra and nanocubes using a colloidal synthesis approach. The CuNi nanocrystals terminated with exclusive crystallographic facets were controlled and achieved by a group of synergetic capping ligands in a hot solution system. Specifically, the growth of {111}-bounded CuNi nano-octahedra is derived by a thermodynamic control, whereas the generation of {100}-terminated CuNi nanocubes is steered by a kinetic capping of chloride. Using a reduction of 4-nitrophenol with sodium borohydride as a model reaction, CuNi nano-octahedra and nanocubes demonstrated a strong facet-dependence due to their different surface energies although both exhibited remarkable catalytic activity with the high rate constant over mass (k/m). A kinetic study indicated that this is a pseudo first-order reaction with an excess of sodium borohydride. CuNi nanocubes as the catalysts showed better catalytic performance (k/m = 385 s-1•g-1) than the CuNi nano-octahedra (k/m = 120 s-1•g-1), indicating that 4-nitrophenol and hydrogen were adsorbed on the {100} facets with their molecules parallel to the surface much easier than those on {111} facets.

Keywords

catalyticnanostructuresurface reaction
Type
Articles
Information
MRS Advances , Volume 5 , Issue 27-28: Energy & Environment , 2020 , pp. 1491 - 1496
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Copyright
Copyright © Materials Research Society 2020

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References

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