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Cobalt-doped molybdenum disulfide in-situ grown on graphite paper with excellent electrocatalytic activity for triiodide evolution.
- Source :
-
Electrochimica Acta . Feb2018, Vol. 263, p328-337. 10p. - Publication Year :
- 2018
-
Abstract
- Molybdenum disulfide (MoS 2 ) is considered as a promising candidate to Pt-based catalysts. Literatures report the active centers of MoS 2 locate at its edges, while the perfect in-plane domains are not active. In this study, a simple Co Mo S precursor decomposition approach is used to synthesize Co-doped MoS 2 in-situ grown graphite paper (GP) substrate. Electrochemical analyses reveal the Co-doped MoS 2 possesses excellent electrocatalytic activity comparable to Pt. Density functional theory (DFT) calculations indicate the inert in-plane S atoms neighboring the doped Co atoms become active towards triiodide reduction, as revealed by the adsorption energies ( E ad ) of iodine atom decreasing from 0.36 eV to −0.52 eV, identical with value obtained from Pt (−0.52 eV). Due to increased active sites, highly conductive of GP, and excellent electrical connection between Co-doped MoS 2 and GP substrate, the dye-sensitized solar cell fabricated using Co-doped MoS 2 /GP as counter electrode (CE) shows higher photoelectric conversion efficiency (7.26%) than those based on MoS 2 /GP CE (6.57%) and platinized F-doped tin oxide (Pt/FTO) electrode (6.87%). [ABSTRACT FROM AUTHOR]
- Subjects :
- *COBALT
*MOLYBDENUM disulfide
*GRAPHITE
*ELECTROCATALYSIS
*DENSITY functional theory
Subjects
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 263
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 127792163
- Full Text :
- https://doi.org/10.1016/j.electacta.2018.01.054