Controlling Carbonization of Tannin for the Effective Pd Loading to Hydrogenate Lignin‐Derived Aldehydes
Year: 2025
Type: article
Abstract: Finding new catalytic applications for tannin, a biomass resource, exploiting its structural features and renewable nature, helps contribute toward carbon neutrality in catalysis. Herein, novel Pd‐supported, carbon‐neutral catalysts are synthesized using tannic acid. First, tannic acid is cross‐linked and coated on the surface of nano‐SiO2. This material is then subjected to controllable carbonization, with the temperature being optimized, to obtain the catalyst support SiO2@TA‐T (T: carbonization temperature). Experimental results demonstrate that carbonizing at 400 °C remained part of the phenolic hydroxyls of tannin with satisfactory reducing ability. Meanwhile, the condensation and the deoxygenation of tannin increased the thermal stability of this support and introduced porous structures and abundant defect sites. This material is then used to adsorb and in situ reduce Pd2+ to develop Pd‐based catalysts. To this end, this synthesized Pd/SiO2@TA‐400 catalyst is then used to hydrogenate vanillin, with a conversion of 99% to vanillyl alcohol at a pressure of 0.5 MPa initial H2 and a temperature of 20 °C for 60 min. Such remarkable results are corroborated in the hydrogenation of several lignin‐derived aromatic aldehydes, with the catalyst achieving high conversion and outstanding recyclability (5 recycles).
Source: ChemSusChem
Authors: Qian Jiang, Zuzhi Li, Javier Remón, Hui Xin, Zhicheng Jiang, Bi Shi
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
Award: G6766867131
OpenAlex ID: W4409665092