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Chatterjee A, Mondal P, Chakraborty P, Kumar B, Mandal S, Rizzoli C, Saha R, Adhikary B, Dey SK. Strategic Synthesis of Heptacoordinated Fe III Bifunctional Complexes for Efficient Water Electrolysis. Angew Chem Int Ed Engl 2023; 62:e202307832. [PMID: 37477221 DOI: 10.1002/anie.202307832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/16/2023] [Accepted: 07/19/2023] [Indexed: 07/22/2023]
Abstract
In this research, highly efficient heterogeneous bifunctional (BF) electrocatalysts (ECs) have been strategically designed by Fe coordination (CR ) complexes, [Fe2 L2 (H2 O)2 Cl2 ] (C1) and [Fe2 L2 (H2 O)2 (SO4 )].2(CH4 O) (C2) where the high seven CR number synergistically modifies the electronic environment of the Fe centre for facilitation of H2 O electrolysis. The electronic status of Fe and its adjacent atomic sites have been further modified by the replacement of -Cl- in C1 by -SO4 2- in C2. Interestingly, compared to C1, the O-S-O bridged C2 reveals superior BF activity with extremely low overpotential (η) at 10 mA cm-2 (140 mVOER , 62 mVHER ) and small Tafel slope (120.9 mV dec-1 OER , 45.8 mV dec-1 HER ). Additionally, C2 also facilitates a high-performance alkaline H2 O electrolyzer with cell voltage of 1.54 V at 10 mA cm-2 and exhibits remarkable long-term stability. Thus, exploration of the intrinsic properties of metal-organic framework (MOF)-based ECs opens up a new approach to the rational design of a wide range of molecular catalysts.
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Affiliation(s)
| | - Papri Mondal
- Department of Chemistry, Indian Institution of Engineering Science and Technology, 711103, Shibpur, Howrah, India
| | - Priyanka Chakraborty
- Department of Chemistry, Sidho-Kanho-Birsha University, 723104, Purulia, WB, India
| | - Bidyapati Kumar
- Department of Chemistry, Sidho-Kanho-Birsha University, 723104, Purulia, WB, India
| | - Sourav Mandal
- Department of Chemistry, Sidho-Kanho-Birsha University, 723104, Purulia, WB, India
| | - Corrado Rizzoli
- Dipartimento S.C.V.S.A., Università di Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
| | - Rajat Saha
- Department of Chemistry, Kazi Nazrul University, 713340, Asansol, WB, India
| | - Bibhutosh Adhikary
- Department of Chemistry, Indian Institution of Engineering Science and Technology, 711103, Shibpur, Howrah, India
| | - Subrata K Dey
- Department of Chemistry, Sidho-Kanho-Birsha University, 723104, Purulia, WB, India
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Synthesis and characterisation of a seven coordinated pentagonal bipyramidal non-heme iron(III)-complex of a phosphorus-based N3P1 type tris(2-pyridinylamino) phosphine sulphide ligand. J CHEM SCI 2021. [DOI: 10.1007/s12039-021-01993-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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