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jo urna l o f e nviro n mental scie nces 92 (2020) 1 e10

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Morphology-dependent interfacial interactions of

Fe O with Ag nanoparticles for determining the
3
2
catalytic reduction of p-nitrophenol

1
1
Ningning Wang , Shuai Zeng , Hong Yuan 1,* , Jin Huang 2,*
1
Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China
Normal University, Wuhan 430079, China
2 Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry
and Chemical Engineering, Southwest University, Chongqing 400715, China

arti cle i nfo a bstra ct

Article history: In this work, we fabricated three kinds of Ag/Fe 2 O 3 model catalysts with different mor-
Received 2 September 2019 phologies to study the interfacial interactions between Ag and Fe 2 O 3 , and how they
Received in revised form affected the catalytic activity in hydrogenation of p-nitrophenol was explored. The hy-
2 February 2020 drothermal method was used to synthesize the metal oxide supported silver catalyst, with
Accepted 2 February 2020 various morphologies including nanoplates (NPs), nanospheres (NSs), and nanocubes
Available online 13 February 2020 (NCs). The crystal structure, morphology and surface elements of the composite were
investigated by various measurements, such as X-ray diffraction (XRD), scanning electron
Keywords: microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron
spectroscopy (XPS). The catalytic activity was also evaluated by the reduction of p-nitro-
Ag/Fe 2 O 3
Interfacial interaction phenol to p-aminophenol. It was found that the activities of the above catalysts varied with
Catalytic activity the morphology of the support. Among them, Ag/Fe 2 O 3 NPs promoted the highest perfor-
p-Nitrophenol mance, Ag/Fe 2 O 3 NSs were slightly inferior, and Ag/Fe 2 O 3 NCs were the worst. At last, we
Morphology dependence ascribed the remarkable activity of Ag/Fe 2 O 3 NPs to the strong metal-support interactions
between Ag and Fe 2 O 3 .
© 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of
Sciences. Published by Elsevier B.V.

composite catalyst (Shekhar et al., 2012; Larsen et al., 2016;
Introduction
Zheng et al., 2016; Yao et al., 2017; Luo et al., 2019). However,
the performance mechanism of supported metal catalysts is
Among various heterogeneous catalysts, the supported noble
controversial, which mainly focuses on the active site: metal
metal catalysts, incorporated the merit of both counterpart, sites, support, or metal-support interface (Chen and Pan, 2009;
show perfect activity and have the promising prospect
Bruix et al., 2012; Tang et al., 2016). Recently, to understand the
(Herzing et al., 2008; Saha et al., 2010; Huang et al., 2013). As a role of the interfacial interactions between metal and support,
result, extensive efforts have been devoted to more efficient
composite catalyst were well designed for specific chemical
catalyst for specific reaction via various supported metal
reaction, such as CO and hydrocarbon oxidation, the water-
* Corresponding authors.
E-mail addresses: yuanhong@mail.ccnu.edu.cn (Hong Yuan), huangjin2015@swu.edu.cn (Jin Huang).
https://doi.org/10.1016/j.jes.2020.02.001
1001-0742/© 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.