Kinetics insights into size effects of carbon nanotubes'growth and their supported platinum catalysts for 4,6-dinitroresorcinol hydrogenation

Yan Zhang ¹Xiangxue Zhang ¹Keng Sang ¹Wenyao Chen ¹Gang Qian ¹Jing Zhang ¹Xuezhi Duan ¹Xinggui Zhou ¹Weikang Yuan¹

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作者信息

1. State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
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Abstract

Size effects are a well-documented phenomenon in heterogeneous catalysis,typically attributed to al-terations in geometric and electronic properties.In this study,we investigate the influence of catalyst size in the preparation of carbon nanotube(CNT)and the hydrogenation of 4,6-dinitroresorcinol(DNR)using Fe2O3 and Pt catalysts,respectively.Various Fe2O3/Al2O3 catalysts were synthesized for CNT growth through catalytic chemical vapor deposition.Our findings reveal a significant influence of Fe2O3 nano-particle size on the structure and yield of CNT.Specifically,CNT produced with Fe2O3/Al2O3 containing 28％(mass)Fe loading exhibits abundant surface defects,an increased area for metal-particle immobi-lization,and a high carbon yield.This makes it a promising candidate for DNR hydrogenation.Utilizing this catalyst support,we further investigate the size effects of Pt nanoparticles on DNR hydrogenation.Larger Pt catalysts demonstrate a preference for 4,6-diaminoresorcinol generation at(1 0 0)sites,whereas smaller Pt catalysts are more susceptible to electronic properties.The kinetics insights obtained from this study have the potential to pave the way for the development of more efficient catalysts for both CNT synthesis and DNR hydrogenation.

Key words

Kinetics/Size effects/Catalytic hydrogenation/Active site

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基金项目

National Key Research and Development Program of China(2022YFA1503504)

National Natural Science Foundation of China(22038003)

National Natural Science Foundation of China(22178100)

National Natural Science Foundation of China(22178101)

National Natural Science Foundation of China(U22B20141)

Shanghai Pilot Program for Basic Research(22TQ1400100-15)

Innovation Program of Shanghai Municipal Education Commission()

Program of Shanghai Academic/Technology Research Leader(21XD1421000)

Shanghai Science and Technology Innovation Action Plan(22JC1403800)

出版年

2024

中国化学工程学报(英文版)

中国化工学会

中国化学工程学报(英文版)

CSTPCDEI

影响因子：0.818

ISSN：1004-9541

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