Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 62, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202300094
Keywords
*OH adspecies; Alcohol Oxidation; Electrocatalysis; Plastic Upcycling; d Band Center
Categories
Ask authors/readers for more resources
The electrooxidation of EG to GA with high efficiency and selectivity has been achieved using a Pd-Ni(OH)2 catalyst. The generation of OH* promoted by Ni(OH)2 plays a critical role in facilitating EG-to-GA oxidation and removing poisonous carbonyl species. The synergistic effect of Pd and Ni facilitates the rapid desorption and transfer of GA, avoiding over-oxidation and achieving high selectivity.
Electro-reforming of Polyethylene-terephthalate-derived (PET-derived) ethylene glycol (EG) into fine chemicals and H-2 is an ideal solution to address severe plastic pollution. Here, we report the electrooxidation of EG to glycolic acid (GA) with a high Faraday efficiency and selectivity (>85 %) even at an industry-level current density (600 mA cm(-2) at 1.15 V vs. RHE) over a Pd-Ni(OH)(2) catalyst. Notably, stable electrolysis over 200 h can be achieved, outperforming all available Pd-based catalysts. Combined experimental and theoretical results reveal that 1) the OH* generation promoted by Ni(OH)(2) plays a critical role in facilitating EG-to-GA oxidation and removing poisonous carbonyl species, thereby achieving high activity and stability; 2) Pd with a downshifted d-band center and the oxophilic Ni can synergistically facilitate the rapid desorption and transfer of GA from the active Pd sites to the inactive Ni sites, avoiding over-oxidation and thus achieving high selectivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available