Modification of glassy carbon electrode with iron-terpyridine complex and iron-terpyridine complex covalently bonded to ordered mesoporous carbon substrate: Preparation, electrochemistry and application to H 2 O 2 determination

Ghasemi, Elaheh; Alimardani, Esmaeil; Shams, Esmaeil; Koohmareh, Gholam Ali

doi:10.1016/j.jelechem.2017.01.043

Cited by 17 publications

(11 citation statements)

References 50 publications

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“…4-Diazonium-2,2':6,2"-terpyridine was generated in-situ with sodium nitrite in 0.5 M HCl and subjected to electrochemical grafting (see Experimental and Scheme 1a). 27,48,49 As shown in Fig 2a, a strong reduction event appears at -0.68 V vs. RHE during cathodic cycling in 0.5 M HCl electrolyte solution.…”

Section: Synthesis and Performance Of The Pt Single-atom Catalysts In Hermentioning

confidence: 77%

Highly Active Platinum Single-Atom Catalyst grafted onto 3D Carbon Cloth Support for the Electrocatalytic Hydrogen Evolution Reaction

Elmas

Pan

et al. 2021

Preprint

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Platinum single-atom catalysts (PtSACs) on 3D support are emerging as new frontier in catalysis due to their atom-economy, outstanding performance and the advantage to bridge the gap between homogeneous and heterogeneous catalysis. Here we report on a simple, single-step electrochemical grafting attachment of a metal-selective ligand, 2,6:2’,2”-terpyridine, and the synthesis of platinum single-atom electrocatalyst via metal uptake from aqueous salt solution. At an ultra-low loading of 0.26 ±0.02 μgcm-2 of platinum, the single atom catalysts supported on porous 3D carbon cloth electrode via chemical bonding revealed the highest reported mass activity of 77.1 AgPt-1 at η = 50 mV/RHE compared to the commercial catalyst 20 % Pt/C. The electro-grafted terpyridine ligand can also act as an effective scavenger for leached platinum from the counter electrode during extended operational hours. The method to make the PtSAC is facile, non-hazardous and versatile without involving any elaborative pre- and/or post-treatment steps and, the value of the added platinum to the ligand is only 0.1 US$m-2.

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Section: Synthesis and Performance Of The Pt Single-atom Catalysts In Hermentioning

confidence: 77%

Highly Active Platinum Single-Atom Catalyst grafted onto 3D Carbon Cloth Support for the Electrocatalytic Hydrogen Evolution Reaction

Elmas

Pan

et al. 2021

Preprint

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“… Series of redox mediators have been adsorbed onto OMC surfaces ( Figure 6 C), either via π–π stacking, or hydrophobic interactions, or electrostatic attractions, or combinations of these effects. Examples are available for ferrocene-carboxylic acid [ 112 , 113 ], Ru(bpy) 3 2+ [ 114 ], metal porphyrins [ 115 , 116 ] and other metal-ligand complexes [ 117 , 118 ], polyoxometalate and related derivatives [ 24 , 119 ], curcumin [ 120 ], tetrathiafulvalene [ 121 ], metal hexacyanoferrates [ 122 , 123 , 124 , 125 , 126 ]. Non-redox reagents were also immobilized on OMC, such as organic ligands or polymers [ 127 , 128 , 129 ], as well as ionic liquids [ 130 , 131 , 132 ] or surfactants [ 126 , 133 , 134 ].…”

Section: Electrochemical Sensors and Biosensors Applicationsmentioning

confidence: 99%

“…The electrochemical sensors based on functionalized OMC [ 24 , 26 , 49 , 50 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 139 , 140 , 141 , 142 , 143 , 144 , 145 , 146 , 147 , 148 , 149 , 150 , 151 , 152 , 153 , 154 , 155 , 156 , 157 , 158 , 159 ...…”

Section: Electrochemical Sensors and Biosensors Applicationsunclassified

Recent Trends on Electrochemical Sensors Based on Ordered Mesoporous Carbon

Walcarius

2017

Sensors

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The past decade has seen an increasing number of extensive studies devoted to the exploitation of ordered mesoporous carbon (OMC) materials in electrochemistry, notably in the fields of energy and sensing. The present review summarizes the recent achievements made in field of electroanalysis using electrodes modified with such nanomaterials. On the basis of comprehensive tables, the interest in OMC for designing electrochemical sensors is illustrated through the various applications developed to date. They include voltammetric detection after preconcentration, electrocatalysis (intrinsically due to OMC or based on suitable catalysts deposited onto OMC), electrochemical biosensors, as well as electrochemiluminescence and potentiometric sensors.

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“…In attaching diazonium-substituted ligands onto graphitic and metallic surfaces via strong co-valent chemical bond the grafting method has proven as a powerful tool to address interfacial chemistry. [22,[25][26][27] Grafting of diazonium-substituted ligands onto conducting surfaces for applications in electrocatalysis has many advantages over transitional heterogeneous methods: i) task-specific tailoring of the ligand such as stability through chelating effects and metal-selectivity through use of suitable donor combinations, ii) use of synthetic tools to make the ligand specific for an application, iii) use of 2D, 3D and porous electrode materials as solid supports, including existing electrodes for large-scale applications and, iv) controlling the mass loading through grafting density and metal uptake. In particular, making homogeneous catalysts heterogeneous through strong chemical sigma bonds is an interesting avenue for the electrocatalytic hydrogen evolution reaction.…”

Section: Introductionmentioning

confidence: 99%

Highly Active Platinum Single-Atom Catalyst grafted onto 3D Carbon Cloth Support for the Electrocatalytic Hydrogen Evolution Reaction

Elmas

Roman

et al. 2022

Preprint

View full text Add to dashboard Cite

Platinum single-atom catalysts (PtSACs) on 3D support are emerging as the new frontier in catalysis due to their atom-economy, outstanding performance, and the advantage to bridge the gap between homogeneous and heterogeneous catalysis. Here we report on a simple, single-step electrochemical grafting attachment of a metal-selective ligand, 2,6:2’,2”-terpyridine, and the synthesis of platinum single-atom electrocatalyst via metal uptake from aqueous salt solution. At an ultra-low loading of 0.26 ±0.02 μgcm-2 of platinum, the single-atom catalysts supported on porous 3D carbon cloth electrode via chemical bonding revealed higher mass activity ratios, up to 83.0 at η = 50 mV/RHE, compared to the commercial catalyst 20 % Pt/C. Using hydrogen binding energy as the descriptor for efficiency, density functional theory calculations show that promoting hydrogen evolution using terpyridine-Pt proceeds when the catalyst is in a 2+ charge state and with a single hydroxy co-ligand attached to Pt catalytic center. Calculations predict an HER overpotential of about 0.28 V. The electro-grafted terpyridine ligand proved to act as effective scavenger for leached platinum from the counter electrode during extended operational hours. The method to make the PtSAC is facile, non-hazardous and versatile without involving any elaborate pre- and/or post-treatment steps and, the cost of the added platinum to the ligand is only 0.1 US$m-2.

show abstract

Modification of glassy carbon electrode with iron-terpyridine complex and iron-terpyridine complex covalently bonded to ordered mesoporous carbon substrate: Preparation, electrochemistry and application to H 2 O 2 determination

Cited by 17 publications

References 50 publications

Highly Active Platinum Single-Atom Catalyst grafted onto 3D Carbon Cloth Support for the Electrocatalytic Hydrogen Evolution Reaction

Highly Active Platinum Single-Atom Catalyst grafted onto 3D Carbon Cloth Support for the Electrocatalytic Hydrogen Evolution Reaction

Recent Trends on Electrochemical Sensors Based on Ordered Mesoporous Carbon

Highly Active Platinum Single-Atom Catalyst grafted onto 3D Carbon Cloth Support for the Electrocatalytic Hydrogen Evolution Reaction

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