Lai, F;
Feng, J;
Ye, X;
Zong, W;
He, G;
Miao, Y-E;
Han, X;
... Liu, T; + view all
(2019)
Energy level engineering in transition-metal doped spinel-structured nanosheets for efficient overall water splitting.
Journal of Materials Chemistry A
, 7
(2)
pp. 827-833.
10.1039/c8ta10162k.
Preview |
Text
He_Manuscript(6).pdf - Accepted Version Download (1MB) | Preview |
Abstract
Unraveling the role of transition-metal doping in affecting the native spinel-structured nanosheets' water splitting remains a grand challenge. In this work, a series of spinel-structured nanosheets wrapped hollow nitrogen-doped carbon polyhedrons were constructed, and doped transition-metal domains were deliberately introduced on the surface. Theoretical investigations show that their energy level can be finely tuned via direct transition-metal doping engineering. As a prototype, an Fe-doped NiCo2O4 nanosheets wrapped hollow nitrogen-doped carbon polyhedron (Fe–NiCo2O4@HNCP) exhibits outstanding bifunctional electrocatalytic performances with low overpotentials (η = 270 mV for OER, η = 84 mV for HER), low Tafel slopes (b = 42 mV dec−1 for OER, b = 47 mV dec−1 for HER), and high durability. The enhanced performance is attributed to the synergistic effects of energy level matching for electron transfer, and partial charge delocalization-induced rich active sites for reactant adsorption via thermodynamic and kinetic acceleration. This work may open a new pathway to design highly active and stable transition-metal doped electrocatalysts by manipulated energy levels for efficient overall water splitting.
Type: | Article |
---|---|
Title: | Energy level engineering in transition-metal doped spinel-structured nanosheets for efficient overall water splitting |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1039/c8ta10162k |
Publisher version: | https://doi.org/10.1039/c8ta10162k |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
URI: | https://discovery.ucl.ac.uk/id/eprint/10068371 |
Archive Staff Only
View Item |