(399e) Low Energy Electrochemical Oxidation of Waste Lignin on Non-Precious PbO2/MWNTs Electrocatalyst for Simultaneous Generation of Value-Added Chemicals and Hydrogen
An appropriate approach for selective depolymerization of lignin is to develop nano-scale electrocatalysts that are extremely active and have high surface area. With high surface area, lignin macromolecules will likely possess better interaction and might prevent formation of lignin intermediates on the electrocatalyst surface. With this in mind, one possible electrocatalyst is lead dioxide (PbO2); this material has high electrical conductivity, high oxygen overpotential and chemical inertness and exhibits outstanding electrochemical activity . In this work, the non-precious PbO2/MWNTs electrocatalysts were developed through successive synthesis of PbO2 nanoparticles by hydrolysis of lead (IV) acetate  and further deposition of as-prepared nanoparticles on multi-walled nanotubes (MWNTs) as the support . To study the kinetics, electrocatalytic activity and stability of as-prepared electrocatalyst, electrochemical oxidation of lignin was carried out in a conventional three-electrode cell. The optimum composition of PbO2/MWNTs electrocatalyst was determined considering applied potential and final yield of LMWAs in this system.
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