Enhancing the Biofuel Upgrade Performance for Pd Nanoparticles via Increasing the Support Hydrophilicity of Metal-Organic Frameworks
In this work, the influence of hydrophilic/hydrophobic nature of metal-organic framework (MOF) materials on the catalytic performance of supported Pd nanoparticles for biofuel upgrade was studied. We show that the introduction of hydrophilic groups on a MOF can greatly enhance the performance of the resultant catalyst. Specifically, Pd nanoparticles supported on MIL-101-SO3Na with superhydrophilicity (Pd/MIL-101-SO3Na) far outperforms pristine MIL-101 and benchmark catalyst Pd/C in hydrodeoxygenation reaction of vanillin, a model component of pyrolysis oil derived from the lignin fraction. This is attributed to a favorable mode of adsorption of the highly water soluble reactants on the more hydrophilic support in the vicinity of the catalytically active Pd nanoparticles, thereby promoting their transformation.