Layer by layer assembly of a bio-inspired manganese cluster for electrocatalytic water oxidation

Yifat Cohen; Naama Gluz; Shay Bamany; Galia Maayan; Omer Yehezkeli

doi:10.1016/j.jcat.2020.05.030

Layer by layer assembly of a bio-inspired manganese cluster for electrocatalytic water oxidation

Yifat Cohen, Naama Gluz, Shay Bamany, Galia Maayan, Omer Yehezkeli

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Mn₁₂O₁₂(O₂CC₆H₃(NH₂)₂)₁₆(H₂O)₄ (Mn₁₂DA) is a structural mimic of the oxygen-evolving-complex in photosystem II. Herein we describe a method to integrate the Mn₁₂DA with ITO electrodes using a layer-by-layer approach. Using (3-Aminopropyl)triethoxysilane, (APTES), glutaraldehyde, Mn₁₂DA, and sodium cyanoborohydride as a mild reducing agent, five layers of the electrocatalysts with maximal electrocatalytic currents were obtained. The integration method limits the ligand self-oxidation and prevents the catalyst failure. Furthermore, the developed configuration enables efficient water oxidation electrocatalytic reaction at pH = 7, with an overpotential of 430 mV, a faradaic efficiency of 92% and a high turn-over-number.

Original language	English
Pages (from-to)	207-211
Number of pages	5
Journal	Journal of Catalysis
Volume	389
DOIs	https://doi.org/10.1016/j.jcat.2020.05.030
State	Published - Sep 2020

Keywords

Bio mimicking
Layer-by-layer
Oxygen evolving center
Photosynthesis
Water oxidation

All Science Journal Classification (ASJC) codes

Catalysis
Physical and Theoretical Chemistry

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10.1016/j.jcat.2020.05.030

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title = "Layer by layer assembly of a bio-inspired manganese cluster for electrocatalytic water oxidation",

abstract = "Mn12O12(O2CC6H3(NH2)2)16(H2O)4 (Mn12DA) is a structural mimic of the oxygen-evolving-complex in photosystem II. Herein we describe a method to integrate the Mn12DA with ITO electrodes using a layer-by-layer approach. Using (3-Aminopropyl)triethoxysilane, (APTES), glutaraldehyde, Mn12DA, and sodium cyanoborohydride as a mild reducing agent, five layers of the electrocatalysts with maximal electrocatalytic currents were obtained. The integration method limits the ligand self-oxidation and prevents the catalyst failure. Furthermore, the developed configuration enables efficient water oxidation electrocatalytic reaction at pH = 7, with an overpotential of 430 mV, a faradaic efficiency of 92\% and a high turn-over-number.",

keywords = "Bio mimicking, Layer-by-layer, Oxygen evolving center, Photosynthesis, Water oxidation",

author = "Yifat Cohen and Naama Gluz and Shay Bamany and Galia Maayan and Omer Yehezkeli",

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year = "2020",

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doi = "10.1016/j.jcat.2020.05.030",

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T1 - Layer by layer assembly of a bio-inspired manganese cluster for electrocatalytic water oxidation

AU - Cohen, Yifat

AU - Gluz, Naama

AU - Bamany, Shay

AU - Maayan, Galia

AU - Yehezkeli, Omer

PY - 2020/9

Y1 - 2020/9

N2 - Mn12O12(O2CC6H3(NH2)2)16(H2O)4 (Mn12DA) is a structural mimic of the oxygen-evolving-complex in photosystem II. Herein we describe a method to integrate the Mn12DA with ITO electrodes using a layer-by-layer approach. Using (3-Aminopropyl)triethoxysilane, (APTES), glutaraldehyde, Mn12DA, and sodium cyanoborohydride as a mild reducing agent, five layers of the electrocatalysts with maximal electrocatalytic currents were obtained. The integration method limits the ligand self-oxidation and prevents the catalyst failure. Furthermore, the developed configuration enables efficient water oxidation electrocatalytic reaction at pH = 7, with an overpotential of 430 mV, a faradaic efficiency of 92% and a high turn-over-number.

AB - Mn12O12(O2CC6H3(NH2)2)16(H2O)4 (Mn12DA) is a structural mimic of the oxygen-evolving-complex in photosystem II. Herein we describe a method to integrate the Mn12DA with ITO electrodes using a layer-by-layer approach. Using (3-Aminopropyl)triethoxysilane, (APTES), glutaraldehyde, Mn12DA, and sodium cyanoborohydride as a mild reducing agent, five layers of the electrocatalysts with maximal electrocatalytic currents were obtained. The integration method limits the ligand self-oxidation and prevents the catalyst failure. Furthermore, the developed configuration enables efficient water oxidation electrocatalytic reaction at pH = 7, with an overpotential of 430 mV, a faradaic efficiency of 92% and a high turn-over-number.

KW - Bio mimicking

KW - Layer-by-layer

KW - Oxygen evolving center

KW - Photosynthesis

KW - Water oxidation

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U2 - 10.1016/j.jcat.2020.05.030

DO - 10.1016/j.jcat.2020.05.030

M3 - مقالة

SN - 0021-9517

VL - 389

SP - 207

EP - 211

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

Layer by layer assembly of a bio-inspired manganese cluster for electrocatalytic water oxidation

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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