锚定在镁-铝-钛复合金属氧化物上的热稳定性铂团簇用于高效环烷烃脱氢反应

IF 5.2 3区工程技术 Q2 ENERGY & FUELS

Energy & Fuels Pub Date : 2024-09-11 DOI:10.1021/acs.energyfuels.4c02825

Zhendong Wang, Bofeng Zhang, Gang Hou, Guozhu Liu, Xiangwen Zhang

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引用次数: 0

摘要

稳定高效的催化环烷烃脱氢工艺可满足高超音速飞行器的冷却要求。但铂基催化剂在高温（550 °C）反应条件下会出现烧结和焦炭沉积。在此，我们开发了一种锚定亚纳米铂簇的 MgO-TiO2-Al2O3 复合金属氧化物，用于环烷烃脱氢。碱土金属离子的掺杂会产生氧空位缺陷，从而稳定高度分散的铂簇，提高铂簇的抗焦能力。优化后的 Pt/MTA-10 在 514.7 h-1 的 WHSV 条件下，癸醛的转化率超过 56.0%，萘的选择性超过 60.0%。这项工作为合成热稳定金属簇提供了一种有效的方法，大大拓宽了工业应用的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Thermally Stable Pt Clusters Anchored on Mg–Al–Ti Composite Metal Oxide for Efficient Cycloalkane Dehydrogenation

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Thermally Stable Pt Clusters Anchored on Mg–Al–Ti Composite Metal Oxide for Efficient Cycloalkane Dehydrogenation

A stable and efficient catalytic cycloalkane dehydrogenation process could satisfy the cooling requirement of hypersonic vehicles. But Pt-based catalysts suffer from sintering and coke deposition under high-temperature (>550 °C) reaction conditions. Here, we developed a MgO–TiO₂–Al₂O₃ composite metal oxide anchored subnanometer Pt clusters for cycloalkane dehydrogenation. The doping of alkaline-earth metal ions generates oxygen vacancy defects, which could stabilize highly dispersed Pt clusters and improve the anticoking ability of Pt clusters. The optimized Pt/MTA-10 exhibited a conversion rate of decalin above 56.0%, with the selectivity of naphthalene above 60.0% at a WHSV of 514.7 h^–1. This work provides an effective method to synthesize thermally stable metal clusters and significantly broadens the avenues for industrial applications.

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来源期刊

Energy & Fuels 工程技术-工程：化工

CiteScore

9.20

自引率

13.20%

发文量

1101

审稿时长

2.1 months

期刊介绍： Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.