NiCu-exchanged hierarchical Y and ZSM5 zeolites for the electrochemical oxidation of glycerol

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2024-08-14 DOI:10.1016/j.micromeso.2024.113300

Andrea Ruggiu , Pier Parpot , Isabel C. Neves , Ana Paula Carvalho , Maria Giorgia Cutrufello , António Maurício Fonseca , Angela Martins , Elisabetta Rombi

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Abstract

Two hierarchical Y and ZSM5 zeolites were prepared with a surfactant-mediated desilication method. Both the conventional and hierarchical forms were used to prepare NiCu-zeolites via the ion-exchange method. All samples were characterised using different techniques. For the hierarchical materials, N₂ physisorption and TEM analyses confirmed the appearance of mesoporosity. Transition metal-containing zeolites were used as novel electrocatalysts for the glycerol electrochemical oxidation reaction (GEOR) in the form of modified electrodes. Cyclic voltammetry was used to investigate the surface properties of the modified electrodes and their activity toward GEOR at different pH provided by different supporting electrolyte solutions, indicating alkaline conditions as the most promising ones. The hierarchical forms showed a remarkable higher activity compared to the conventional ones, together with appreciable yields towards partially oxidized products of industrial interest. Noteworthy, a stable current higher than 10 mA was generated, which is interesting to produce H₂ by coupling GEOR and hydrogen evolution reaction.

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用于甘油电化学氧化的镍铜交换分层 Y 和 ZSM5 沸石

采用表面活性剂介导的脱硅方法制备了两种分层 Y 型和 ZSM5 型沸石。传统型和分层型沸石均用于通过离子交换法制备镍铜沸石。所有样品都采用不同的技术进行了表征。对于分层材料，N2 物理吸附和 TEM 分析证实了介孔的出现。含过渡金属的沸石以改性电极的形式被用作甘油电化学氧化反应（GEOR）的新型电催化剂。使用循环伏安法研究了改性电极的表面特性及其在不同电解质溶液提供的不同 pH 值条件下的甘油电化学氧化反应活性，结果表明碱性条件下的甘油电化学氧化反应最有前景。与传统电极相比，分层形式的电极显示出更高的活性，同时对具有工业价值的部分氧化产物的产量也很可观。值得注意的是，产生的稳定电流高于 10 mA，这对通过耦合 GEOR 和氢进化反应产生 H2 很有意义。

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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.