One-pot synthesis of Ir subnanosized clusters supported on MWW nanosheets as effective catalysts for C-C bond hydrogenolysis

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED Microporous and Mesoporous Materials Pub Date : 2024-10-01 DOI:10.1016/j.micromeso.2024.113356

Evgeny Naranov , Alexey Sadovnikov , Olga Arapova , Dmitry Gorbunov , Alexander Gorbunov , Svetlana Shapovalova , Alexander Guda , Alexander Soldatov , Anton Maximov

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Abstract

The rational design synthesis of metal catalysts with high dispersion and ordered structure is a challenging subject in materials chemistry and heterogeneous catalysis. In this study, we report one-pot synthesis of Ir subnanosized particles supported on MWW nanosheets and their application in hydrogenolysis of decalin. Here, it has been found that C-C bond cleavage occurs via a synergistic carbocation and carbene mechanism on Ir-containing catalysts, and via carbocation in the case of solid acids. The combination of optimal acidic and metallic site characteristics in the subnanosized Ir supported on MWW nanosheets Pill_Ir-ZN_150 sample contributes to the high activity of the final catalysts. We expect that these Ir catalytic systems will open up more opportunities for hydrogenolysis of naphthenics to high-value products.

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以 MWW 纳米片为支撑的 Ir 亚纳米化团簇的单锅合成，作为 C-C 键氢解的有效催化剂

合理设计合成具有高分散性和有序结构的金属催化剂是材料化学和异相催化领域的一个挑战性课题。在本研究中，我们报告了在 MWW 纳米片上支撑的亚纳米化 Ir 粒子的一锅合成及其在癸醛氢解中的应用。研究发现，在含 Ir 的催化剂上，C-C 键的裂解是通过协同的碳位和碳烯机制发生的，而在固体酸的情况下则是通过碳位发生的。在 MWW 纳米片 Pill_Ir-ZN_150 样品上支持的亚纳米化 Ir 中，酸性和金属位点特性的最佳组合有助于最终催化剂的高活性。我们希望这些铱催化体系能为环烷烃的氢解转化为高价值产品提供更多机会。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.