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Bimetallic M–Cu (M = Ag, Au, Ni) Nanoparticles Supported on $γAl_{2}O_{3}-CeO_{2}$ Synthesized by a Redox Method Applied in Wet Oxidation of Phenol in Aqueous Solution and Petroleum Refinery Wastewater
| Content Provider | MDPI |
|---|---|
| Author | Hermicenda, Pérez-Vidal Juan, C. Arévalo-Pérez Adib, A. Silahua-Pavón Gerardo, E. Córdova-Pérez Ignacio, Cuauhtémoc-López Héctor Martínez-García, Anabel, González-Díaz Guerra-Que, Zenaida Cortez-Elizalde, Jorge Torres-Torres, José Gilberto |
| Copyright Year | 2021 |
| Description | Three bimetallic catalysts of the type M–Cu with M = Ag, Au and Ni supports were successfully prepared by a two-step synthesized method using $Cu/Al_{2}O_{3}-CeO_{2}$ as the base monometallic catalyst. The nanocatalysts were characterized using X-ray diffraction (XRD), temperature-programmed reduction of $H_{2}$ $(H_{2}$-TPR), $N_{2}$ adsorption-desorption, scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and ultraviolet–visible spectroscopy with diffuse reflectance (DR-UV-Vis) techniques. This synthesized methodology allowed a close interaction between two metals on the support surface; therefore, it could have synthesized an efficient transition–noble mixture bimetallic nanostructure. Alloy formation through bimetallic nanoparticles (BNPs) of AgCuAlCe and AuCuAlCe was demonstrated by DR–UV–Vis, EDS, TEM and $H_{2}$-TPR. Furthermore, in the case of AgCuAlCe and AuCuAlCe, improvements were observed in their reducibility, in contrast to NiCuAlCe. The addition of a noble metal over the monometallic copper-based catalyst drastically improved the phenol mineralization. The higher activity and selectivity to $CO_{2}$ of the bimetallic gold–copper- and silver–copper-supported catalysts can be attributed to the alloy compound formation and the synergetic effect of the M–Cu interaction. Petroleum Refinery Wastewater (PRW) had a complex composition that affected the applied single CWAO treatment, rendering it inefficient. |
| Starting Page | 2570 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11102570 |
| Journal | Nanomaterials |
| Issue Number | 10 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-30 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Water Science and Technology Alloy Nanoparticles Bimetallic Catalysts Metal Leaching Mineralization Process Metal–metal Interaction Reducibility Active Oxygen Species |
| Content Type | Text |
| Resource Type | Article |
