Abstract
New heteroleptic dppe appended Co(iii)-dithiocarbamate (dtc) complex cations with compositions [Co(S2CNEt2)2(dppe)](PF6) (Co-Et), [Co(S2CNPri2)2(dppe)](PF6) (Co-Pr) and [Co(S2CNBun2)2(dppe)](PF6) (Co-Bu) have been synthesized and characterized by microanalysis, spectroscopic methods and crystallographic analysis. The single crystal X-ray diffraction results indicated that in all three complexes, the coordination environment around Co(iii) is distorted octahedral and Co(iii) is coordinated to four sulfur centers of the two dtc ligands and the two phosphorus centers of the dppe ligand. These complexes serve as precursors to yield cobalt sulfide/cobalt phosphide nano-composites dCo-Et, dCo-Pr and dCo-Bu by solvothermal decomposition of Co-Et, Co-Pr and Co-Bu, respectively. The decomposed materials have been characterized by PXRD and SEM-EDAX and explored as potential electrocatalysts for both oxygen evolution and hydrogen evolution reactions in basic and acidic media, respectively. Catalytic activity is dependent on the precursor complex and best OER and HER activities are observed for dCo-Bu with an η10 of 230 mV and a Tafel slope of 192.11 mV dec−1 for the OER and an η10 of 470 mV and a Tafel slope of 126.21 mV dec−1 for the HER.
Original language | English |
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Pages (from-to) | 9366-9375 |
Number of pages | 10 |
Journal | New Journal of Chemistry |
Volume | 48 |
Issue number | 20 |
Early online date | 7 May 2024 |
DOIs | |
Publication status | Published - 7 May 2024 |
Funding
AK is grateful to the Center of Excellence, Uttar Pradesh Government for sanctioning the project number 70/2021/1543/sattar-4-2022/001-70-4099-7-2022. Dr Mohd. Muddassir is grateful to the Researchers Supporting Project number (RSP2024R141), King Saud University, Riyadh, Saudi Arabia, for financial assistance.
Funders | Funder number |
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Center of Excellence | |
King Saud University | |
Uttar Pradesh Government | RSP2024R141, 70/2021/1543/sattar-4-2022/001-70-4099-7-2022 |
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Materials Chemistry