12/2/2023 0 Comments Chromium atomHowever, h-BN-based materials as robust nanocatalysts in heterogeneous catalysis are still underexplored because of the limited methodologies capable of affording h-BN with controllable crystallinity, abundant porosity, high purity, and defect engineering, which played important roles more » in tuning their catalytic performance. Recent advances in utilizing h-BN as a metal-free catalyst in the oxidative dehydrogenation of propane have triggered broad interests in exploring h-BN in catalysis. They have exhibited unique properties and promising application potentials in the field of energy storage and transformation. Hexagonal boron nitrides (h-BNs) are attractive two-dimensional (2D) nanomaterials that consist of alternating B and N atoms and layered honeycomb-like structures similar to graphene. Chemical Sciences, Geosciences & Biosciences Division National Natural Science Foundation of China (NSFC) OSTI Identifier: 1883764 Grant/Contract Number: AC05-00OR22725 21978119 22078135 22178154 Resource Type: Accepted Manuscript Journal Name: ACS Catalysis Additional Journal Information: Journal Volume: 12 Journal Issue: 14 Journal ID: ISSN 2155-5435 Publisher: American Chemical Society (ACS) Country of Publication: United States Language: English Subject: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY single-atom catalyst aerobic oxidation deep desulfurization carbon nanotube = , Publication Date: Research Org.: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States) Sponsoring Org.: USDOE Office of Science (SC), Basic Energy Sciences (BES). of Tennessee, Knoxville, TN (United States) (ORNL), Oak Ridge, TN (United States) Univ. The attractive catalytic performance and cycling stability of the chromium-based SACs make them promising candidates in practical sulfur species removal from liquid fuels, supplying an alternative guidance on the catalyst design toward cost-effective and energy-efficient ODS procedures. – transformation and subsequent ASCs-to-sulfone conversion have been achieved, with the former benefiting from the chromium-active sites and the latter arising from the robust, nanoporous, and π-conjugated architecture of the supports. ![]() Adopting aromatic sulfur compound (ASC)-containing alkanes as a model system with molecular oxygen as the oxidant, efficient oxygen-to-active O 2 In this work, leveraging the merits of single-atom catalysts (SACs) with earth-abundant metal cores and robust nanoporous supports, a series of catalysts composed of homogeneously distributed single chromium atoms anchored on multiwalled carbon nanotubes were fabricated and deployed to catalyze the aerobic ODS transformation. However, the state-of-the-art systems still rely on noble metal nanocatalysts, with deactivation issues caused by coking and sintering still present. Oxidative desulfurization (ODS) plays critical roles in the production of high-quality sulfur impurity-free fuels, especially procedures using molecular oxygen as the sole oxidant.
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