期刊
ACS APPLIED MATERIALS & INTERFACES
卷 15, 期 19, 页码 23276-23285出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.3c02810
关键词
high-entropy alloy; PtFeCoNiCu; CNT; maleic anhydride; aqueous-phase; succinic acid
High-entropy alloys (HEAs) show remarkable catalytic performance in various reactions, but their synthesis with controlled structures remains a challenge. This study successfully prepared ultrasmall PtFeCoNiCu HEA nanoparticles supported on carbon nanotubes (CNTs) through a lithium naphthalenide-driven reduction method. The supported PtFeCoNiCu/CNT catalyst exhibited high catalytic activity, selectivity, low activation energy, and excellent stability in the hydrogenation reaction of maleic anhydride to succinic acid. Moreover, the mass-specific activity of Pt in this catalyst was much higher than that of Pt/CNT. This work provides strong support for HEAs as advanced heterogeneous catalysts and promotes further research and application in selective hydrogenation.
High-entropy alloys (HEAs), as new heterogeneous catalytic materials, possess remarkable catalytic performance in numerous reactions. However, rational and controllable synthesis of these complex structures remains a challenge. In this work, bulk and carbon nanotube (CNT)-supported ultrasmall PtFeCoNiCu HEA nanoparticles with an average particle size of 1.58 nm are prepared by lithium naphthalenide-driven reduction under mild conditions. The supported PtFeCoNiCu/CNT catalyst exhibits high catalytic activity in the aqueous-phase hydrogenation of maleic anhydride to succinic acid with a selectivity of 98% at full conversion of maleic acid (the hydrolysis product of maleic anhydride), a low apparent activation energy (Ea = 49 kJ mol-1), and excellent stability. Moreover, a much higher mass-specific activity of Pt in the catalyst is displayed over PtFeCoNiCu/CNT (1515.4 mmolmaleic acid gPt-1 h-1) than that of 5 wt % Pt/CNT (388.0 mmolmaleic acid gPt-1 h-1). This work provides a strong support for HEAs as advanced heterogeneous catalysts and will be of great significance for promoting the research and application of HEAs in the field of selective hydrogenation.
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