Journal
ACS NANO
Volume 16, Issue 3, Pages 3906-3916Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c09254
Keywords
cobalt phosphide; cobalt mixed oxides; electrochemical catalyst; hydrogen evolution reaction (HER); phosphatization
Categories
Funding
- King Abdullah University of Science and Technology (KAUST)
- KAUST Office of Sponsored Research (OSR) [OSR-2018-CARF/CCF3079]
Ask authors/readers for more resources
This paper reports a electrocatalyst with activity and durability in an alkaline medium, and reveals its high efficiency reaction mechanism through theoretical studies.
Design and development of an efficient, nonprecious catalyst with structural features and functionality necessary for driving the hydrogen evolution reaction (HER) in an alkaline medium remain a formidable challenge. At the root of the functional limitation is the inability to tune the active catalytic sites while overcoming the poor reaction kinetics observed under basic conditions. Herein, we report a facile approach to enable the selective design of an electrochemically efficient cobalt phosphide oxide composite catalyst on carbon cloth (CoP-CoxOy/CC), with good activity and durability toward HER in alkaline medium (eta(10) = -43 mV). Theoretical studies revealed that the redistribution of electrons at laterally dispersed Co phosphide/oxide interfaces gives rise to a synergistic effect in the heterostructured composite, by which various Co oxide phases initiate the dissociation of the alkaline water molecule. Meanwhile, the highly active CoP further facilitates the adsorption-desorption process of water electrolysis, leading to extremely high HER activity.
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