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

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

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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.

KineticsSize effectsCatalytic hydrogenationActive site

Yan Zhang、Xiangxue Zhang、Keng Sang、Wenyao Chen、Gang Qian、Jing Zhang、Xuezhi Duan、Xinggui Zhou、Weikang Yuan

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

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShanghai Pilot Program for Basic ResearchInnovation Program of Shanghai Municipal Education CommissionProgram of Shanghai Academic/Technology Research LeaderShanghai Science and Technology Innovation Action Plan

2022YFA1503504220380032217810022178101U22B2014122TQ1400100-1521XD142100022JC1403800

2024

10.1016/j.cjche.2024.05.012

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
年,卷(期)：2024.72(8)