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Abstract Design of stable high-performance heterogeneous catalysts has become crucial for efficient catalytic conversion of renewable biomass into high value-added chemicals. In this study, amphiphilic polymer support was synthesized by grafting hydrophobic groups onto hydrophilic cellulose nanocrystals and utilized as a support for PdNi alloy nanoparticles. The as-synthesized catalysts exhibited encouragingly high performance in the hydrodeoxygenation of vanillin under mild conditions. Graphical abstract Unlabelled Image Highlights • Amphiphilic catalysts were prepared to enhance the catalytic activity. • Hydrodeoxygenation of vanillin as biofuel upgrade was performed. • The reaction is performed with a recyclable catalyst in water. • Earth-abundant and biodegradable cellulose material was used as catalyst support. [ABSTRACT FROM AUTHOR]

Pd−Ni bimetallic nanoparticles (BMNPs) encapsulated in MIL‐100(Fe) (Pd‐Ni@MIL‐100(Fe) was fabricated and employed as an efficient catalyst for the reversible dehydrogenation/hydrogenation of N‐Heterocycles derivatives in water under mild conditions. Excellent catalytic performance for both reactions endows Pd‐Ni@MIL‐100(Fe) great potential value in organic chemistry. Alloying Pd with Ni can enhance the catalytic performance due to the bimetallic synergy. Both Lewis acidity and ordered mesoporous structure of MIL‐100(Fe) are beneficial to the performance of the catalyst owing to its stabilization of BMNPs, reduction of the electron density of Pd atoms and enhancement of substrates adsorption capacity. Bimetallics are no trick! A recyclable catalyst, Pd−Ni bimetallic nanoparticles encapsulated in MIL‐100(Fe), is fabricated and applied in acceptorless reversible dehydrogenation and hydrogenation of quinoline derivatives. Stabilization of MIL‐100(Fe) for BMNPs, absorptivity of MIL‐100(Fe) for reactants and gas together with the electronic effect between BMNPs and MIL‐100(Fe) all contribute to outstanding catalytic performance of Pd1Ni4@MIL‐100(Fe) catalyst. [ABSTRACT FROM AUTHOR]

A catalytic system based on Pd−Ni bimetallic nanoparticles (BMNPs) encapsulated in the nanocavities of UiO‐66 was established for the activation of C−O bonds in ethers. Pd0.25Ni4@UiO‐66 catalyst show excellent catalytic performance in the directly methylation and arylation of ethers under a mild reaction condition. High catalytic activity of the catalyst could be ascribed to the "synergistic effect" between the two metal components and strong interaction between BMNPs and the carrier (UiO‐66). BMNPs encapsulated in UiO‐66 also guarantee a good reusability of the catalyst, the catalyst delivered high catalytic activity for at least four cycles. Our work highlights the great potential value of ethers as powerful alternatives for aryl halides as well as the bright future of BMNPs and MOFs in the catalysis field. Grignard for the win! A catalyst of recyclable Pd−Ni bimetallic nanoparticles encapsulated in UiO‐66 is fabricated and applied in the C−O activation reaction of ethers, which highlights the great potential value of ethers as electrophiles. Synergistic effect between the two metal components and strong interaction between BMNPs and the carrier (UiO‐66) all contribute to outstanding catalytic performance of Pd0.25Ni4@UiO‐66 catalyst. [ABSTRACT FROM AUTHOR]

Graphical abstract A recyclable Pd-Ni bimetallic nanoparticles supported on active carbon is fabricated and applied in the HDO of aldehydes. "Synergistic effect" between the two metal components and interaction between BMNPs and the carrier (active carbon) all contribute to outstanding catalytic performance of Pd 1 Ni 4 /AC catalyst. Highlights • An efficient Pd-Ni/AC catalyst was established for HDO of vanillin. • HDO of vanillin and a series of aldehydes could be realized under a mild condition. • Bimetallic nanocatalyst out-performed corresponding monocatalysts due to "Synergistic effect". • The as-prepared Pd-Ni/AC catalyst demonstrated superior reuse potential. • Properties of the carrier have a huge impact on the catalytic performance. Abstract A highly efficient bimetallic nanoparticles (BMNPs) catalyst was reported, Pd 1 Ni 4 /AC, consisting of Pd 1 Ni 4 BMNPs supported on active carbon, shown excellent catalytic performance and stablity in hydrodeoxygenation (HDO) of vanillin. HDO of vanillin and various aldehydes with high efficiency and selectivity could be achieved at low H 2 pressure (2 bar) under mild conditions in the presence of the BMNPs catalyst, no obvious decrease on catalytic performance was observed after eight cycles. The superior catalytic performance of the Pd 1 Ni 4 /AC catalyst was mainly attributable to the synergetic electronic effect between Pd and Ni, which showcased the great potential of BMNPs in the catalysis field. [ABSTRACT FROM AUTHOR]