Catalytic Transformation of Positional Nitrophenol Isomers on Highly Active Ag/Linde‐Type A4 Zeolite: A Comparative Analysis
Source abstract
Abstract
Abstract The catalytic transformation of ortho‐(o‐NP), meta‐(m‐NP) and para‐nitrophenols (p‐NP) by Ag nanoparticles (Ag‐NPs) stabilised on zeolite A4 (ZA4) is presented for the first time. The catalysts are prepared by microwave‐assisted synthesis (Ag/ZA4‐MW) or ion exchange (Ag/ZA4‐IE). The results indicate that the nitrophenol reduction rate depends on the molecule structure and the presence of low‐coordinated metallic Ag‐NPs (∼2 nm and sub nanometric species). Meanwhile, the reactivity tendency depends on the synthesis methodology (m‐NP>p‐NP>o‐NP and o‐NP>m‐NP>p‐NP for Ag/ZA4‐MW and Ag/ZA4‐IE, respectively). The turnover frequency (TOF) values estimated for nitrophenols reduction are superior for Ag/ZA4‐MW catalyst by several orders of magnitude compared with those obtained for Ag/ZA4‐IE catalyst. In addition, the catalyst exhibits remarkable catalytic stability for the reduction of p‐NP even after the fifth consecutive catalytic run. The presently prepared catalysts are characterised by superior catalytic activity for the reduction of nitroaromatic compounds than similar Ag‐based materials reported in the literature.
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Research context
OpenAlex topics: Nanomaterials for catalytic reactions · Advanced Photocatalysis Techniques · Ammonia Synthesis and Nitrogen Reduction
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Coordinación para la Innovación y la Aplicación de la Ciencia y la Tecnología Universidad Autónoma de San Luis Potosí Av. Sierra Leona #550, Col. Lomas 2a. Sección, CP 78210 San Luis Potosí SLP México
Center for Integrated Nanotechnologies, Materials Physics and Applications Division Los Alamos National Laboratory 1663 Los Alamos New Mexico 87545 United States
Applied Physics and Materials Science and Materials Interfaces Research and Applications MIRA! Northern Arizona University 11700 South Osborne Drive Flagstaff Arizona 86011 United States
Universidad Nacional Autónoma de México Centro de Nanociencias y Nanotecnología Km. 107 Carretera Tijuana a Ensenada, C.P. 22860 Ensenada Baja California México
Cátedras CONACYT, Coordinación para la Innovación y la Aplicación de la Ciencia y la Tecnología Universidad Autónoma de San Luis Potosí Av. Sierra Leona #550, Col. Lomas 2a. Sección, CP 78210 San Luis Potosí SLP México
Funding
Office of Science
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