Electric field-enhanced hydrogenation catalysis: modified palladium-graphene oxide composites

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL Molecular Catalysis Pub Date : 2025-04-19 DOI:10.1016/j.mcat.2025.115132

Shi Wee Yee , Fazira Ilyana Abdul Razak , Suhaila Sapari , Hadi Nur , Ghozlan Elbashir Amer , Siti Salwa Alias

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Abstract

Palladium-graphene oxide (Pd-GO) composites show promise as catalysts for alkene hydrogenation, but challenges such as metal particle agglomeration and limited conductivity hinder their widespread use. In this study, Pd-GO and polyvinylpyrrolidone-stabilized Pd-GO (Pd-PVP/GO) composites were synthesized and characterized using FTIR, XRD, SEM, EDX, and HRTEM. The incorporation of PVP as a stabilizing and capping agent was found to significantly improve the dispersion an reduce agglomeration of Pd nanoparticles in Pd-PVP/GO. Catalytic performance evaluation in the hydrogenation of 1-octene under an external electric field (EEF) revealed enhanced activity for both composites, with Pd-GO showing the highest conversion efficiency. Computational studies further confirmed that the improved reactivity of Pd-GO is attributed to its smaller band gap and favourable electron density distribution upon addition of Pd. The synergistic effect between Pd-GO and EEF highlights the potential of electric field-assisted catalysis in alkene hydrogenation. this work provides valuable insights into the development of high-performance, sustainable catalysts for industrial hydrogenation processes.

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电场增强氢化催化：改性钯-氧化石墨烯复合材料

钯-氧化石墨烯（Pd-GO）复合材料有望成为烯烃加氢催化剂，但金属颗粒团聚和有限的导电性等挑战阻碍了其广泛应用。本研究合成了Pd-GO和聚乙烯吡咯烷酮稳定的Pd-GO （Pd-PVP/GO）复合材料，并利用FTIR、XRD、SEM、EDX和HRTEM对其进行了表征。PVP作为一种稳定和封盖剂，可以显著改善Pd-PVP/GO中Pd纳米粒子的分散和减少团聚。外电场下对1-辛烯加氢反应的催化性能评价表明，两种复合材料的催化活性均有增强，其中Pd-GO的转化效率最高。计算研究进一步证实了Pd- go反应性的提高是由于添加Pd后其带隙变小和电子密度分布有利。Pd-GO和EEF之间的协同效应凸显了电场辅助催化烯烃加氢的潜力。这项工作为开发高性能、可持续的工业加氢催化剂提供了有价值的见解。

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods