Heterogeneous Catalytic Activity of Platinum Nanoparticles Hosted in Mesoporous Silica Thin Films Modified with Polyelectrolyte Brushes
Source abstract
Abstract
Platinum nanoparticles of 3 nm diameter were included in mesoporous silica thin films by controlling the mesopore surface charge with a short polymer brush. This metal-polymer-mesopore nanocomposite presents high catalytic activity toward ammonia oxidation at low temperatures with 4.5% weight platinum loading. An anomalous partial selectivity toward nitrous oxide is observed for the first time, which can be traced back to the synergy of the particles and modified surface. This effect opens a path toward the design of nanocomposite catalysts with highly controlled environments, in which the size- and function-controlled cavities can be tuned in order to lower the reaction barriers.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Dendrimers and Hyperbranched Polymers · Mesoporous Materials and Catalysis · Polymer Surface Interaction Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Departamento de Química, Facultad de Ciencias Exactas, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata, CONICET, La Plata, Buenos Aires, Argentina
Gerencia Química, Comisión Nacional de Energía Atómica, Avenida Gral Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina
“Soft Control”, Department of Chemistry, Technische Universität Darmstadt, Petersenstrasse 22, 64287 Darmstadt, Germany
Instituto Sabato, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina
Departamento Química Inorgánica, Analítica y Química Física, FCEN, Universidad de Buenos Aires, Pab. II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
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