In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2023-01, No. 15 ( 2023-08-28), p. 1428-1428
Abstract:
Current technologies for mass production of hydrogen gas, needed for fuel cells, synthesis of ammonia and many other purposes, have an enormous carbon footprint. Less than 5% is manufactured by much cleaner water electrolysis, mainly because the electrodes are based on precious platinum. In line with a worldwide effort on replacing platinum by earth abundant metals, the present investigation focuses on electrocatalytic proton reduction by cobalt corroles, via full characterization of a series of complexes and comparison of their properties. The smallest possible and most electron-rich derivative , with H atoms rather than larger and much more electron withdrawing substituents on the macrocycle, provided the best catalytic activity: lowest over potential and largest faradaic efficiency, almost as good as platinum. Mechanism-of-action investigations by experimental and computational analyses exposed that the reason for the superior performance is a new reaction pathway in which protons are activated by singly rather than doubly-reduced cobalt Figure 1
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2023-01151428mtgabs
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2023
detail.hit.zdb_id:
2438749-6
