Sodium borohydride hydrolysis for hydrogen generation over Mn-BDC and MnCo-BDC (BDC – 1,4-benzene-dicarboxylate) coordination polymers

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-03-12 DOI:10.1016/j.poly.2025.117493

Bárbara Stefany Lima da Silva , Milena Kowalczuk Manosso Amorim , Elibe Silva Souza , Maria Alaide de Oliveira , Ohanna Maria Menezes Madeiro da Costa , Bráulio Silva Barros , Joanna Kulesza

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Abstract

Catalysts play a crucial role in enhancing the efficiency and rate of hydrogen release from sodium borohydride (NaBH₄) hydrolysis. In this work, Mn-BDC (BDC – 1,4-benzene dicarboxylate) Coordination Polymer (CP) was synthesized via an efficient sonochemical method and posteriorly used for the preparation of the bimetallic MnCo-BDC Coordination Polymer via the wet impregnation method. The materials were characterized by the FTIR, PXRD, SEM, and TGA methods, indicating that both samples are isostructural. The prepared materials were investigated as novel active heterogeneous catalysts for hydrogen generation from sodium borohydride. The bimetallic MnCo-BDC sample showed enhanced catalytical performance compared to the Mn-BDC counterpart, with an excellent low activation energy of 12.4 kJ mol⁻¹. Furthermore, this material maintained its activity for at least five catalytic reaction cycles.

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催化剂在提高硼氢化钠（NaBH4）水解释放氢气的效率和速率方面起着至关重要的作用。在这项工作中，通过高效的超声化学方法合成了 Mn-BDC（BDC - 1,4-苯二甲酸酯）配位聚合物（CP），之后通过湿法浸渍制备了双金属 MnCo-BDC 配位聚合物。通过傅立叶变换红外光谱、PXRD、扫描电镜和热重分析方法对材料进行了表征，结果表明两种样品均为等结构。研究人员将制备的材料作为新型活性异相催化剂，用于硼氢化钠制氢。与锰-硼氢化钠样品相比，双金属锰-钴-硼氢化钠样品显示出更强的催化性能，活化能低至 12.4 kJ mol-1。此外，这种材料还能在至少五个催化反应循环中保持活性。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.