Pd/SBA-15-NH2制备及其催化甲酸分解制氢

Preparation of Pd/SBA-15-NH2 for Catalytic Dehydrogenation of Formic Acid

胡恩政 ¹赵忠诚 ¹徐康 ¹徐东彦¹

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作者信息

1. 青岛科技大学化工学院,山东青岛 266042
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摘要

制备了介孔分子筛SBA-15,对其进行氨基功能化得到 SBA-15-N H 2 载体,采用液相还原法制备了负载超细Pd纳米催化剂,利用X射线衍射仪(XRD)和透射电镜(TEM)对催化剂的结构和形貌进行了分析,并将制备的催化剂用于甲酸脱氢反应.结果表明,氨基的引入使得Pd纳米颗粒在载体上均匀分布,平均粒径仅为 2.43 nm.在反应温度为 313 K、甲酸/甲酸钠物质的量比为 5∶3、甲酸浓度为 5 mol·L-1 的条件下,甲酸脱氢反应的表观 TOF 值可达5 610 h-1,氢气选择性接近 100%.

Abstract

The mesoporous silica SBA-15 was prepared and amino-functionalized to obtain a SBA-15-NH2 support.The Pd/SBA-15-NH2 catalyst with ultrafine Pd nanoparticles was prepared by liquid reduction method and used for the dehydrogenation of formic acid.The catalyst was characterized by X-ray diffraction(XRD)and transmission electron microscopy(TEM).The characterization results indicated that Pd nanoparticles are well dispersed on the surface of amino-functionalized SBA-15 and have a small mean particle size of 2.43 nm.The as-synthesized Pd/SBA-15-NH2 catalyst possesses superior activity and 100%H2 selec-tivity toward dehydrogenation of formic acid.A high apparent turnover frequency of 5 610 h-1 can be obtained at 313 K,formic acid/sodium formate ratio of 5∶3 and formic acid con-centration of 5 mol·L-1.

关键词

甲酸脱氢/SBA-15分子筛/氨基功能化/Pd基催化剂

Key words

dehydrogenation of formic acid/SBA-15/amine-functionalization/Pd-based cata-lyst

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基金项目

山东省自然科学基金项目(ZR2020MB028)

出版年

2024

青岛科技大学学报(自然科学版)

青岛科技大学

青岛科技大学学报(自然科学版)

CSTPCD

影响因子：0.297

ISSN：1672-6987

参考文献量2

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