<\/path><\/svg> Research<\/p>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=\u00bb1″ _builder_version=\u00bb4.16″ _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row _builder_version=\u00bb4.16″ _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4″ _builder_version=\u00bb4.16″ _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#173042″ text_font_size=\u00bb15px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
The main research line of <\/span>CataNa<\/b><\/span> is focused on <\/span>Metal Nanoparticle Catalysis<\/b><\/span>, but always from the perspective of organometallic chemistry. More specifically, it is centered on<\/span> <\/span>three main topics<\/span>:<\/span><\/p>\n[\/et_pb_text][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#3C3C3C\u00bb text_font_size=\u00bb20px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
1) Influence of the Stabilizing Ligands in Metal Nanoparticle Catalysis<\/b><\/span>.<\/b><\/span><\/p>\n[\/et_pb_text][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#173042″ text_font_size=\u00bb15px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
During the last ten years, we have observed that a<\/span>n efficient strategy to control the activity and selectivity of a metal nanoparticle is the use of ancillary ligands that can transform the NP surface. <\/span>As in organometallic complexes,<\/b><\/span> <\/span>surface ligands are able to modify the electronic and steric properties of MNPs, and therefore control their catalytic properties<\/b><\/span>.<\/span> <\/span><\/sup>Moreover, stabilizing ligands are also able to modulate <\/span>other MNP properties such as <\/span>morphology<\/b><\/span>, <\/span>solubility<\/b><\/span>, <\/span>stability<\/b><\/span> <\/span>or <\/span>magnetic<\/b><\/span> <\/span>character<\/b><\/span>.<\/span> In this line, we have observed that <\/span>MNPs can be stabilized with classic organometallic ligands (i. e. phosphines, N-hetrocyclic carbenes) or new specific ligands (i.e. imidazolium-amidinates) (<\/span>Figure 1<\/b><\/span>). As a whole<\/span>, we are focused on the use of ancillary ligands as <\/span>a new way to improve the selectivity and activity of the MNPs<\/b><\/span>, approach until now mainly exploited by homogeneous catalysis (Acc. Chem. Res. <\/em>2018<\/strong>, 51<\/em>, 376).<\/span><\/p>\n[\/et_pb_text][et_pb_image src=\u00bbhttps:\/\/grupo.us.es\/catana\/wp-content\/uploads\/2023\/10\/Imagen1.png\u00bb title_text=\u00bbImagen1″ align=\u00bbcenter\u00bb _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb width=\u00bb55%\u00bb width_tablet=\u00bb75%\u00bb width_phone=\u00bb75%\u00bb width_last_edited=\u00bbon|desktop\u00bb height_tablet=\u00bb\u00bb height_phone=\u00bb\u00bb height_last_edited=\u00bbon|desktop\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_image][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#3C3C3C\u00bb text_font_size=\u00bb13px\u00bb text_orientation=\u00bbjustified\u00bb module_alignment=\u00bbcenter\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
Figure 1.<\/strong> Coordination modes of stabilizing ligands and substrates on MNPs.<\/p>\n[\/et_pb_text][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#3C3C3C\u00bb text_font_size=\u00bb20px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
2) MNPs Supported on Graphene Materials.<\/strong><\/p>\n[\/et_pb_text][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#173042″ text_font_size=\u00bb15px\u00bb text_orientation=\u00bbjustified\u00bb custom_padding=\u00bb0px|||||\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
In this research line we prepare graphene-supported MNPs by using an organometallic approach synthetic method. This consists in the decomposition of an organometallic precursor under mild conditions (r.t. and 3 bar H<\/span><\/span>2<\/span><\/sub><\/span>) in the presence of a graphene support, which act as stabilizer (<\/span><\/span>Figure 2<\/b><\/span><\/span>). We have observed that the presence of heteroatoms in the graphene materials facilitates the generation of small, monodisperse and well distributed MNPs. Moreover, <\/span><\/span>a<\/b><\/span><\/span> clear influence of the support has been also observed on the activity and selectivity<\/b><\/span><\/span> in hydrogenation reactions. For example, Ru NPs supported in N-doped graphene showed a remarkably activity and selectivity in the hydrogenation of palmitic acid to the corresponding fatty alcohol. In this case, <\/span><\/span>the N-doped support not only stabilizes the Ru NPs, but it is also directly involved in the catalytic reactions (J. Catal.<\/em> 2019<\/strong>, 377, 429<\/em>). <\/span><\/span><\/p>\n[\/et_pb_text][et_pb_image src=\u00bbhttps:\/\/grupo.us.es\/catana\/\/wp-content\/uploads\/2023\/07\/Figure-2.-Synthesis-of-N-doped-graphene-supported-Ru-NPs-following-the-organometallic-approach.png\u00bb title_text=\u00bbFigure 2. Synthesis of N-doped graphene-supported Ru NPs following the organometallic approach.\u00bb align=\u00bbcenter\u00bb _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb width=\u00bb75%\u00bb width_tablet=\u00bb75%\u00bb width_phone=\u00bb75%\u00bb width_last_edited=\u00bbon|desktop\u00bb height_tablet=\u00bb\u00bb height_phone=\u00bb\u00bb height_last_edited=\u00bbon|desktop\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_image][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#3C3C3C\u00bb text_font_size=\u00bb13px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
Figure 2.<\/strong> Synthesis of N-doped graphene-supported Ru NPs following the organometallic approach.<\/p>\n[\/et_pb_text][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#173042″ text_font_size=\u00bb15px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
Following the same organometallic approach, we are also able to prepare bimetallic nanoparticles supported on N-doped graphene with different metal compositions<\/span><\/span>. We observed that <\/span><\/span>the activity and selectivity of the bimetallic NPs <\/span><\/span>in the hydrogenation of acetophenone<\/span><\/span> were highly dependent on the nanoparticle composition. Therefore, we were able to <\/span><\/span>control the selectivity of these bimetallic nanocatalysts by adjusting their metal compositions <\/b>(Catal Sci. Tech.<\/em> 2021<\/strong>, 11<\/em>, 494)<\/span><\/span>. <\/span><\/span><\/p>\nIn addition, by this organometallic approach, we are also generating MNPs on nanographenes (Chem. Sci.<\/em> 2022<\/strong>, 13<\/em>, 13046) or reduced graphene oxides for hydrogen storage reactions (Catal Sci. Tech.<\/em> 2022<\/strong>, 12<\/em>, 1257) and transformation of biomass derived compounds (Nanoscale.<\/em> 2022<\/strong>, 15, <\/em>12319).<\/span><\/span><\/p>\n[\/et_pb_text][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#3C3C3C\u00bb text_font_size=\u00bb20px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
3)\u00a0 Magnetically Induced Catalysis<\/b><\/p>\n
[\/et_pb_text][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#173042″ text_font_size=\u00bb15px\u00bb text_orientation=\u00bbjustified\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
Magnetic induction is an <\/span><\/span>attractive alternative to conventional heating<\/b><\/span><\/span>, which is generating great interest in the field of catalysis. This is based on the use of eddy currents and\/or hysteresis losses produced in a ferromagnetic material by the presence of high-frequency alternating magnetic fields (<\/span><\/span>AMF<\/b><\/span><\/span>). The main advantage of magnetic heating <\/span><\/span>Vs<\/i><\/span><\/span> other heating techniques is its simplicity since this <\/span><\/span>is a non-contact technique<\/b><\/span><\/span>. Moreover, from an energetic point of view, it displays the <\/span><\/span>highest power transmission<\/b><\/span><\/span> since the energy is directly transferred inside the ferromagnetic material to be heated. All of this, combined with an <\/span><\/span>extremely short warming time<\/b><\/span><\/span>, make magnetic heating a very energetically efficient method.<\/span><\/span><\/p>\nThis novel research line is<\/span><\/span> centred in <\/span><\/span>metal nanoparticles<\/b><\/span><\/span> and <\/span><\/span>magnetically induced catalysis<\/b><\/span><\/span>. <\/b><\/i><\/span><\/span>We have synthesized magnetically thermo-active magnetic nanoparticles (MagNPs) encapsulated in carbon (<\/span><\/span>Figure 3<\/b><\/span><\/span>), which apart to protect them from intense oxidation, it confers to the materials the stability necessary for high temperature reactions. These <\/span><\/span>ultra-stable heating agents <\/b><\/span><\/span>decorated with Ni or Pt-Sn, have demonstrated to be active in high T\u00aa reactions such as, methanation, propane dry reforming and dehydrogenation of propane (ACS Appl. NanoMat.<\/em> 2020<\/strong>, 3<\/em>, 7076)<\/span><\/span>.<\/i><\/span><\/span><\/p>\nEncouraged by the efficient heating capacity of these MagNPs, we are currently synthetizing <\/span><\/span>core@shell nanoparticles<\/b><\/span><\/span> (<\/span><\/span>Figure 3<\/b><\/span><\/span>) also following an organometallic approach. Here the core is formed by FeCo NPs, which acts as heating agents, and the shell constitutes the catalytically active phase (Ni). These core@shell NPs are being employed in <\/span><\/span>magnetically induced catalytic reduction of biomass-derived compounds in solution <\/b>(ACS. Catal.<\/em> 2022<\/strong>, 12<\/em>, 8462)<\/span><\/span>.<\/span><\/span><\/p>\n[\/et_pb_text][et_pb_image src=\u00bbhttps:\/\/grupo.us.es\/catana\/\/wp-content\/uploads\/2023\/07\/Figure-3.-TEM-images-and-EDX-line-scan-of-FeCo@Ni-NPs-covered-by-carbon.png\u00bb title_text=\u00bbFigure 3. TEM images and EDX line-scan of FeCo@Ni NPs covered by carbon.\u00bb align=\u00bbcenter\u00bb _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb height=\u00bb250px\u00bb height_tablet=\u00bb200px\u00bb height_phone=\u00bb100px\u00bb height_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_image][et_pb_text _builder_version=\u00bb4.21.0″ _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#3C3C3C\u00bb text_font_size=\u00bb13px\u00bb text_orientation=\u00bbjustified\u00bb module_alignment=\u00bbcenter\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n
Figure 3.<\/strong> TEM images and EDX line-scan of FeCo@Ni NPs covered by carbon.<\/p>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"
Research LinesInicio\u00a0 ResearchThe main research line of CataNa is focused on Metal Nanoparticle Catalysis, but always from the perspective of organometallic chemistry. More specifically, it is centered on three main topics:1) Influence of the Stabilizing Ligands in Metal Nanoparticle Catalysis.During the last ten years, we have observed that an efficient strategy to control the activity […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-15","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/pages\/15","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/comments?post=15"}],"version-history":[{"count":18,"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/pages\/15\/revisions"}],"predecessor-version":[{"id":2455,"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/pages\/15\/revisions\/2455"}],"wp:attachment":[{"href":"https:\/\/grupo.us.es\/catana\/index.php\/wp-json\/wp\/v2\/media?parent=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}