Linear, tripodal, macrocyclic: Ligand geometry and ORR activity of supported Pd(II) complexes

Matteo Savastano; Maurizio Passaponti; Walter Giurlani; Leonardo Lari; Nicola Calisi; Estefanía Delgado-Pinar; Elena Salvador Serrano; Enrique Garcia-España; Massimo Innocenti; Vlado K. Lazarov; Antonio Bianchi

doi:10.1016/j.ica.2021.120250

Linear, tripodal, macrocyclic: Ligand geometry and ORR activity of supported Pd(II) complexes

Matteo Savastano, Maurizio Passaponti, Walter Giurlani, Leonardo Lari, Nicola Calisi, Estefanía Delgado-Pinar, Elena Salvador Serrano, Enrique Garcia-España, Massimo Innocenti, Vlado K. Lazarov, Antonio Bianchi^*

^*Corresponding author for this work

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

Abstract

The novel ligand H₃L designed to spontaneously adsorb onto MWCNT via electron-deficient pyrimidine residues and bind metal cations is used to prepare an oxygen reduction reaction (ORR) cathode catalyst based on supported Pd(II) complexes. Herein we report the synthesis of the ligand, its solution behaviour (protonation constants, binding constants for the test cation Cu(II), UV evidence of Cu(II) and Pd(II) complexes formation) and ORR performances together with XPS and STEM characterization. Tripodal nature of the H₃L ligand frame it in-between previously studied macrocyclic and linear open chain ligands, allowing to draw meaningful comparisons.

Original language	English
Article number	120250
Number of pages	11
Journal	INORGANICA CHIMICA ACTA
Volume	518
Early online date	12 Jan 2021
DOIs	https://doi.org/10.1016/j.ica.2021.120250
Publication status	Published - 1 Apr 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

Carbon nanotubes
Fuel cells
Oxygen reduction reactions
Palladium
Polyamine ligands
Supramolecular interactions

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10.1016/j.ica.2021.120250

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title = "Linear, tripodal, macrocyclic: Ligand geometry and ORR activity of supported Pd(II) complexes",

abstract = "The novel ligand H3L designed to spontaneously adsorb onto MWCNT via electron-deficient pyrimidine residues and bind metal cations is used to prepare an oxygen reduction reaction (ORR) cathode catalyst based on supported Pd(II) complexes. Herein we report the synthesis of the ligand, its solution behaviour (protonation constants, binding constants for the test cation Cu(II), UV evidence of Cu(II) and Pd(II) complexes formation) and ORR performances together with XPS and STEM characterization. Tripodal nature of the H3L ligand frame it in-between previously studied macrocyclic and linear open chain ligands, allowing to draw meaningful comparisons.",

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author = "Matteo Savastano and Maurizio Passaponti and Walter Giurlani and Leonardo Lari and Nicola Calisi and Estefan{\'i}a Delgado-Pinar and Serrano, {Elena Salvador} and Enrique Garcia-Espa{\~n}a and Massimo Innocenti and Lazarov, {Vlado K.} and Antonio Bianchi",

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doi = "10.1016/j.ica.2021.120250",

language = "English",

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journal = "INORGANICA CHIMICA ACTA",

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T2 - Ligand geometry and ORR activity of supported Pd(II) complexes

AU - Savastano, Matteo

AU - Passaponti, Maurizio

AU - Giurlani, Walter

AU - Lari, Leonardo

AU - Calisi, Nicola

AU - Delgado-Pinar, Estefanía

AU - Serrano, Elena Salvador

AU - Garcia-España, Enrique

AU - Innocenti, Massimo

AU - Lazarov, Vlado K.

AU - Bianchi, Antonio

PY - 2021/4/1

Y1 - 2021/4/1

N2 - The novel ligand H3L designed to spontaneously adsorb onto MWCNT via electron-deficient pyrimidine residues and bind metal cations is used to prepare an oxygen reduction reaction (ORR) cathode catalyst based on supported Pd(II) complexes. Herein we report the synthesis of the ligand, its solution behaviour (protonation constants, binding constants for the test cation Cu(II), UV evidence of Cu(II) and Pd(II) complexes formation) and ORR performances together with XPS and STEM characterization. Tripodal nature of the H3L ligand frame it in-between previously studied macrocyclic and linear open chain ligands, allowing to draw meaningful comparisons.

AB - The novel ligand H3L designed to spontaneously adsorb onto MWCNT via electron-deficient pyrimidine residues and bind metal cations is used to prepare an oxygen reduction reaction (ORR) cathode catalyst based on supported Pd(II) complexes. Herein we report the synthesis of the ligand, its solution behaviour (protonation constants, binding constants for the test cation Cu(II), UV evidence of Cu(II) and Pd(II) complexes formation) and ORR performances together with XPS and STEM characterization. Tripodal nature of the H3L ligand frame it in-between previously studied macrocyclic and linear open chain ligands, allowing to draw meaningful comparisons.

KW - Carbon nanotubes

KW - Fuel cells

KW - Oxygen reduction reactions

KW - Palladium

KW - Polyamine ligands

KW - Supramolecular interactions

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U2 - 10.1016/j.ica.2021.120250

DO - 10.1016/j.ica.2021.120250

M3 - Article

AN - SCOPUS:85100167229

SN - 0020-1693

VL - 518

JO - INORGANICA CHIMICA ACTA

JF - INORGANICA CHIMICA ACTA

M1 - 120250

ER -

Linear, tripodal, macrocyclic: Ligand geometry and ORR activity of supported Pd(II) complexes

Abstract

Bibliographical note

Keywords

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