Pd nanocatalyst supported on amine-functionalized mesoporous graphitic carbon nitride for formic acid hydrogen generator in the polymer electrolyte membrane fuel cell system

IF 7.2 2区工程技术 Q1 CHEMISTRY, APPLIED Fuel Processing Technology Pub Date : 2024-09-24 DOI:10.1016/j.fuproc.2024.108133

Tae Hoon Lee , Seong Mo Yun , Min Jae Kim , Gibeom Kim , Eun Sang Jung , Taek Hyun Oh

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Abstract

Pd nanocatalyst supported on amine-functionalized mesoporous graphitic carbon nitride (Pd/NH₂-mpg-C₃N₄) was investigated for dehydrogenation of formic acid. The catalyst was analyzed and tested to investigate the effect of amine functionalization on hydrogen generation from formic acid. Pd nanocatalyst was dispersed uniformly on NH₂-mpg-C₃N₄ without agglomeration. The turnover frequency value of Pd/NH₂-mpg-C₃N₄ was 1870 h⁻¹, which was higher than that of Pd/mpg-C₃N₄ because of the amine functionalization. The Pd/NH₂-mpg-C₃N₄ was also tested to investigate the effect of various reaction conditions (formic acid concentration, sodium formate concentration, and reaction temperature) on hydrogen generation from formic acid. Formic acid concentration negatively affected the catalytic activity, whereas sodium formate concentration positively affected it. Reaction temperature significantly affected the catalytic activity. The apparent activation energy of the Pd/NH₂-mpg-C₃N₄ catalyst was 60.7 kJ mol⁻¹, and a hydrogen generator with the catalyst exhibited high conversion efficiency at an elevated temperature. Consequently, a hydrogen generator with Pd/NH₂-mpg-C₃N₄ is suitable for polymer electrolyte membrane fuel cell systems.

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用于聚合物电解质膜燃料电池系统中甲酸制氢器的、支撑在胺功能介孔氮化石墨碳上的钯纳米催化剂

研究了以胺功能化介孔氮化石墨（Pd/NH2-mpg-C3N4）为载体的钯纳米催化剂在甲酸脱氢过程中的应用。对催化剂进行了分析和测试，以研究胺官能化对甲酸制氢的影响。钯纳米催化剂均匀地分散在 NH2-mpg-C3N4 上，没有团聚现象。由于胺官能化，Pd/NH2-mpg-C3N4 的翻转频率值为 1870 h-1，高于 Pd/mpg-C3N4 的翻转频率值。此外，还对 Pd/NH2-mpg-C3N4 进行了测试，以研究各种反应条件（甲酸浓度、甲酸钠浓度和反应温度）对甲酸制氢的影响。甲酸浓度对催化活性有负面影响，而甲酸钠浓度对催化活性有正面影响。反应温度对催化活性有明显影响。Pd/NH2-mpg-C3N4 催化剂的表观活化能为 60.7 kJ mol-1，使用该催化剂的制氢装置在高温下具有较高的转化效率。因此，使用 Pd/NH2-mpg-C3N4 的氢气发生器适用于聚合物电解质膜燃料电池系统。

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来源期刊

Fuel Processing Technology 工程技术-工程：化工

CiteScore

13.20

自引率

9.30%

发文量

398

审稿时长

26 days

期刊介绍： Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.