Wood-Derived, Monolithic Chainmail Electrocatalyst for Biomass-Assisted Hydrogen Production

摘要

The chainmail catalyst by encapsulating an active species within the carbonsupport is a well-established concept to endorse extraordinary stability forcatalytic reactions under harsh conditions. Conventional chainmail catalystsinevitably suffer from poor accessibility to active sites, leading to extra voltageto compensate the sluggish diffusion kinetics in electrocatalysis. Herein, thenaturally abundant wood material is converted into a monolithic chainmailelectrocatalyst by encapsulating cobalt nanoparticles within N-dopedcarbonized wood. Such a monolithic chainmail catalyst is employed directly aselectrode for hydrogen evolution (HER), oxygen evolution (OER), andmonosaccharide oxidation reactions (MOR) with benchmark performance. Bycoupling the HER with MOR, the electrolyzer equipped with the monolithicchainmail catalyst allows hydrogen production at a current density of 100 mAcm~（?2） with a full cell voltage of only 1.36 V. Such design of wood-derivedchainmail catalyst provides a promising way to fabricate robustelectrocatalysts for future production of hydrogen and value-added chemicals.