n-杂环卡宾包覆的高分散Pt纳米颗粒用于催化十氢化萘脱氢裂解

IF 3.8 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2025-05-19 DOI:10.1021/acs.iecr.5c00663

Junpeng He, Ruiqing Zhang, Xi Chen, Bofeng Zhang, Guozhu Liu

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引用次数: 0

摘要

燃料主动冷却是克服高超声速飞行热障的有效途径。pt基纳米流体催化剂通过催化脱氢-裂化反应，有效提高了吸热型碳氢燃料的化学吸热性能。然而，高度分散的铂纳米颗粒在纳米流体中往往面临热稳定性差的问题。在这项工作中，采用nah辅助去质子化方法合成了n -杂环碳烯（NHC）覆盖的高分散Pt纳米颗粒（Pt@NHC14）。优化后Pt@NHC14中Pt纳米粒子的平均尺寸为2.4 nm。在725℃下，Pt@NHC14在十氢化萘的准均匀转化中表现出了3.80 MJ/kg的高吸热，比没有去质子化策略的Pt@ILs14高10%。这可以归因于脱氢过程的促进，高度分散的Pt Pt@NHC14的产氢率为9.5%，比Pt@ILs14的产氢率高46%。本研究合成了n杂环碳帽高分散Pt纳米颗粒，为强吸热技术提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

N-Heterocyclic Carbene-Capped Highly Dispersed Pt Nanoparticles for Catalytic Dehydrogenation-Cracking of Decalin toward High Heat Sink

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N-Heterocyclic Carbene-Capped Highly Dispersed Pt Nanoparticles for Catalytic Dehydrogenation-Cracking of Decalin toward High Heat Sink

Active fuel cooling is an effective way to overcome the thermal barrier for hypersonic flight. Pt-based nanofluid catalysts are effective in enhancing the chemical heat sink of endothermic hydrocarbon fuels (EHFs) by facilitating a catalytic dehydrogenation-cracking reaction. However, highly-dispersed Pt nanoparticles often face the problem of poor thermal stability in nanofluids. In this work, a NaH-assisted deprotonation method was applied to synthesize N-heterocyclic carbene (NHC)-capped highly-dispersed Pt nanoparticles (Pt@NHC14). The average size of the Pt nanoparticles in optimized Pt@NHC14 was 2.4 nm. Pt@NHC14 exhibited a high heat sink of 3.80 MJ/kg at 725 °C in the quasi-homogeneous conversion of decalin, which was 10% higher than Pt@ILs14 without a deprotonation strategy. This could be ascribed to the dehydrogenation process being promoted, which was verified by a hydrogen yield of 9.5% on highly dispersed Pt of Pt@NHC14, and that is 46% higher than that of Pt@ILs14. This research synthesizes N-heterocyclic carbene-capped highly-dispersed Pt nanoparticles and provides valuable insights into the strong endothermic technology.

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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.