Anion and cation modulation in metal compounds for bifunctional overall water splitting
Date
2016
Authors
Duan, J.
Chen, S.
Vasileff, A.
Qiao, S.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
ACS Nano, 2016; 10(9):8738-8745
Statement of Responsibility
Jingjing Duan, Sheng Chen, Anthony Vasileff, and Shi Zhang Qiao
Conference Name
Abstract
As substitutes for precious cathodic Pt/C and anodic IrO₂in electrolytic water splitting cells, a bifunctional catalyst electrode (Fe- and O-doped Co₂P grown on nickel foam) has been fabricated by manipulating the cations and anions of metal compounds. The modified catalyst electrode exhibits both superior HER and OER performances with high activity, favorable kinetics, and outstanding durability. The overall ability toward water splitting is especially extraordinary, requiring a small overpotential of 333.5 mV to gain a 10 mA cm⁻² current density. A study on the electrocatalytic mechanism reveals that the atomic modulation between cation and anion plays an important role in optimizing the electrocatalytic activity, which greatly expands the active sites in the electrocatalyst. Further, the three-dimensional conductive porous network is highly advantageous for the exposure of active species, the transport of bubble products, and the transfer of electrons and charges, which substantially boosts reaction kinetics and structure stability.
School/Discipline
Dissertation Note
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Published: September 13, 2016
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© 2016 American Chemical Society