Anion and cation modulation in metal compounds for bifunctional overall water splitting

Duan, Jingjing, Chen, Sheng, Vasileff, Anthony and Qiao, Shi Zhang (2016) Anion and cation modulation in metal compounds for bifunctional overall water splitting. ACS Nano, 10 9: 8738-8745. doi:10.1021/acsnano.6b04252


Author Duan, Jingjing
Chen, Sheng
Vasileff, Anthony
Qiao, Shi Zhang
Title Anion and cation modulation in metal compounds for bifunctional overall water splitting
Journal name ACS Nano   Check publisher's open access policy
ISSN 1936-086X
1936-0851
Publication date 2016-09-27
Year available 2016
Sub-type Article (original research)
DOI 10.1021/acsnano.6b04252
Open Access Status Not yet assessed
Volume 10
Issue 9
Start page 8738
End page 8745
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract As substitutes for precious cathodic Pt/C and anodic IrO2 in electrolytic water splitting cells, a bifunctional catalyst electrode (Fe- and 0-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.
Formatted abstract
As substitutes for precious cathodic Pt/C and anodic IrO2 in 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.
Keyword Anion doping
Bifunctional catalyst electrodes
Cation doping
Heterogeneous catalysis
Overall water splitting
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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