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Structure and oxygen evolution reaction performance of a new manganese phosphonate based on bisphosphonic acid and 1,10-phen.

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Title: Structure and oxygen evolution reaction performance of a new manganese phosphonate based on bisphosphonic acid and 1,10-phen.
Authors: Xu, Ming-Sheng1 (AUTHOR), Wang, Li-Wen1 (AUTHOR), Wang, Bin1 (AUTHOR), Xu, Xiuling1 (AUTHOR), Ma, Qian2 (AUTHOR), Tang, Si-Fu1 (AUTHOR) tangsf@qau.edu.cn
Source: Journal of Molecular Structure. Oct2025, Vol. 1342, pN.PAG-N.PAG. 1p.
Subjects: Oxygen evolution reactions, Chemical kinetics, Phosphonic acids, Ligands (Chemistry), Metal-organic frameworks
Abstract: • A manganese phosphonate with 1,10-phen as auxiliary ligand has been synthesized. • There is strong π···π interactions in the crystal structure. • Manganese phosphonates can be developed into prominent electrocatalyst. • The π···π interactions are helpful to improve the electrocatalytic performance. • Manganese phosphonates are very promising electrocatalysts. Metal-organic frameworks (MOFs) are very promising water splitting electrocatalysts, but current MOF type catalysts are generally plagued by moderate conductivity, slow reaction kinetics, and poor stability. In this work, one phosphonic acid ((1,4-phenylenebis(hydroxymethylene))bis(phosphonic acid), H 6 L) has been employed as a ligand, and 1,10-Phenanthroline (1,10-phen) as an auxiliary ligand to synthesize a new manganese phosphonate, [Mn 2 (H 4 L)(H 2 L) 0.5 (1,10-phen) 2 ]∙4H 2 O (1), aiming to improve the conductivity and stability of the material. Through in situ growth on nickel foam, the overpotential of the prepared MnP/NF electrode at 10 mA cm-2 is only 366.0 mV and can maintain remarkable durability for more than 20 hours. This work provides new insight for the design and optimization of efficient MOF type electrocatalysts. [Display omitted] [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:• A manganese phosphonate with 1,10-phen as auxiliary ligand has been synthesized. • There is strong π···π interactions in the crystal structure. • Manganese phosphonates can be developed into prominent electrocatalyst. • The π···π interactions are helpful to improve the electrocatalytic performance. • Manganese phosphonates are very promising electrocatalysts. Metal-organic frameworks (MOFs) are very promising water splitting electrocatalysts, but current MOF type catalysts are generally plagued by moderate conductivity, slow reaction kinetics, and poor stability. In this work, one phosphonic acid ((1,4-phenylenebis(hydroxymethylene))bis(phosphonic acid), H 6 L) has been employed as a ligand, and 1,10-Phenanthroline (1,10-phen) as an auxiliary ligand to synthesize a new manganese phosphonate, [Mn 2 (H 4 L)(H 2 L) 0.5 (1,10-phen) 2 ]∙4H 2 O (1), aiming to improve the conductivity and stability of the material. Through in situ growth on nickel foam, the overpotential of the prepared MnP/NF electrode at 10 mA cm-2 is only 366.0 mV and can maintain remarkable durability for more than 20 hours. This work provides new insight for the design and optimization of efficient MOF type electrocatalysts. [Display omitted] [ABSTRACT FROM AUTHOR]
ISSN:00222860
DOI:10.1016/j.molstruc.2025.142791