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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.
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