4.7 Article

Modified cellulose nanocrystals immobilized AuPd nanoalloy for formic acid dehydrogenation

期刊

CHEMICAL ENGINEERING JOURNAL
卷 473, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.144640

关键词

AuPd bimetallic nanoparticles; Heterogeneous catalyst; Cellulose nanocrystal; Hydrogen generation; Formic acid dehydrogenation

向作者/读者索取更多资源

Carriers for immobilizing ultrafine AuPd nanoparticles were produced using cellulose nanocrystals treated with polydopamine and polyethyleneimine. The optimized Au0.4Pd0.6/PEI-PDA@CNCs displayed high formic acid dehydrogenation activity, with 100% hydrogen selectivity and high TOFinitial. The modified CNCs enhance electron transfer and optimize the local electronic structure, leading to improved adsorption of key intermediates and potentially enabling the development of more effective catalysts in the future.
Formic acid (FA) is regarded as a promising liquid organic hydrogen transporter. Herein, carriers for immobilizing ultrafine AuPd nanoparticles with a size of approximately 2 nm were produced using cellulose nanocrystals (CNCs) treated with polydopamine (PDA) and polyethyleneimine (PEI). Even with a low noble metal loading (0.01 mmol), the optimized Au0.4Pd0.6/PEI-PDA@CNCs demonstrated extremely high FA dehydrogenation activity compared with similar products, with 100% hydrogen selectivity and TOFinitial up to 4258 h-1 at 323 K. The modified CNCs can enhance the electron transfer between metal particles, and their optimization of the local electronic structure can improve the adsorption of the key intermediates of the reaction. The density functional theory (DFT) calculations were discovered the optimized local electron environment promotes bi-HCOO* rearrangement and lowers the energy barrier for H* and H* binding. This discovery can be used to develop more effective catalysts in the future.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据