CO2‐assisted controllable synthesis of PdNi nanoalloys for highly selective hydrogenation of biomass‐derived 5‐Hydroxymethylfurfural

Guo, Ruichao and Zeng, Yongjian and Lin, Lu and Hu, Di and Lu, Chunqiang and Conroy, Stuart and Zhang, Suyu and Zeng, Chen and Luo, Huixia and Jiang, Zhiwei and Zhang, Xiaolei and Tu, Xin and Yan, Kai (2024) CO2‐assisted controllable synthesis of PdNi nanoalloys for highly selective hydrogenation of biomass‐derived 5‐Hydroxymethylfurfural. Angewandte Chemie International Edition. e202418234. ISSN 1521-3773 (https://doi.org/10.1002/anie.202418234)

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Abstract

The selective hydrogenation of 5‐hydroxymethylfurfural (HMF) to 2,5‐bishydroxymethyltetrahydrofuran (BHMTHF), a vital fuel precursor and solvent, is crucial for biomass refining. Herein, we report highly selective and stable PdNi nanoalloy catalysts for this deep hydrogenation process. A CO2‐assisted green method was developed for the controllable synthesis of various bimetallic and monometallic catalysts. The PdNi/SBA‐15 catalysts with various Pd/Ni ratios exhibited a volcano‐like trend between BHMTHF yield and Pd/Ni ratio. Among all catalysts tested, Pd2Ni1/SBA‐15 achieved the best performance, converting 99.0% of HMF to BHMTHF with 96.0% selectivity, surpassing previously reported catalysts. Additionally, the Pd2Ni1/SBA‐15 catalyst maintained excellent stability even after five recycling runs. Catalyst characterizations (e.g., HAADF‐STEM) and DFT calculations confirmed the successful formation of the alloy structure with electron transfer between Ni and Pd, which accounts for the remarkable performance and stability of the catalyst. This work paves the way for developing highly selective and stable alloy catalysts for biomass valorization.

ORCID iDs

Guo, Ruichao, Zeng, Yongjian, Lin, Lu, Hu, Di, Lu, Chunqiang, Conroy, Stuart, Zhang, Suyu, Zeng, Chen, Luo, Huixia, Jiang, Zhiwei, Zhang, Xiaolei ORCID logoORCID: https://orcid.org/0000-0001-9415-3136, Tu, Xin and Yan, Kai;
CORE (COnnecting REpositories)