Investigation of reactivity of Pt basal planes towards glucose electro-oxidation in neutral solution (pH 7): structure-sensitivity dependence and mechanistic study

Mello, Gisele A.B.; Cheuquepán, William; Feliú, Juan M.

doi:10.1016/j.jelechem.2020.114549

Cited by 18 publications

(5 citation statements)

References 51 publications

(69 reference statements)

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“…Figure S1 shows the CV of Pt in 0.2 M PBS to give a better understanding of its surface structure and its oxidation state as a function of the applied potential. The LSV of glucose shows a peak potential at 0.64 V vs. RHE, corresponding well to the LSV of Pt(110)‐type sites [19] . For Pt 0 , an anodic current density of ca.…”

Section: Figurementioning

confidence: 52%

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Steering the Selectivity of Electrocatalytic Glucose Oxidation by the Pt Oxidation State

van der Ham,

van Keulen,

Koper

et al. 2023

Angewandte Chemie

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Electrocatalytic glucose oxidation can produce high value chemicals, but selectivity needs to be improved. Here we elucidate the role of the Pt oxidation state on the activity and selectivity of electrocatalytic oxidation of glucose with a new analytical approach, using high-pressure liquid chromatography and highpressure anion exchange chromatography. It was found that the type of oxidation, i.e. dehydrogenation of primary and secondary alcohol groups or oxygen transfer to aldehyde groups, strongly depends on the Pt oxidation state. Pt 0 has a 7-fold higher activity for dehydrogenation reactions than for oxidation reactions, while PtO x is equally active for both reactions. Thus, Pt 0 promotes glucose dialdehyde formation, while PtO x favors gluconate formation. The successive dehydrogenation of gluconate is achieved selectively at the primary alcohol group by Pt 0 , while PtO x also promotes the dehydrogenation of secondary alcohol groups, resulting in more complex reaction mixtures.

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Section: Figurementioning

confidence: 52%

“…The LSV of glucose shows a peak potential at 0.64 V vs. RHE, corresponding well to the LSV of Pt(110)type sites. [19] For Pt 0 , an anodic current density of ca. 50 μA cm À 2 can be observed for the electrocatalytic oxida-tion of glucose, while a much lower current density is observed for gluconate and glucuronate oxidation (4 μA cm À 2 ).…”

mentioning

confidence: 99%

Steering the Selectivity of Electrocatalytic Glucose Oxidation by the Pt Oxidation State

van der Ham,

van Keulen,

Koper

et al. 2023

Angewandte Chemie

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show abstract

“…By contrast, after 6 h of oxidation on PtO x (1.2 V vs. RHE), the current densities for the electrocatalytic oxidation of glucose (70 μA cm −2 ) is a 4‐fold higher than for gluconate and glucuronate (16 μA cm −2 each). The overall lower catalytic activity of Pt 0 compared to PtO x can be attributed to the lower applied potential for Pt 0 and a partial CO poisoning of Pt 0 [19,21] . These results indicate that both Pt 0 and PtO x exhibit higher catalytic activity in the oxidation of glucose as compared to gluconate or glucuronate oxidation.…”

Section: Figurementioning

confidence: 93%

“…The overall lower catalytic activity of Pt 0 compared to PtO x can be attributed to the lower applied potential for Pt 0 and a partial CO poisoning of Pt 0 . [19,21] These results indicate that both Pt 0 and PtO x exhibit higher catalytic activity in the oxidation of glucose as compared to gluconate or glucuronate oxidation. By contrast, PtO x is equally active for catalyzing the oxidation of gluconate and glucuronate, while Pt 0 is more active for catalyzing the oxidation of gluconate than glucuronate.…”

Section: Methodsmentioning

confidence: 99%

Steering the Selectivity of Electrocatalytic Glucose Oxidation by the Pt Oxidation State

van der Ham,

van Keulen,

Koper

et al. 2023

Angew Chem Int Ed

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Electrocatalytic glucose oxidation can produce high value chemicals, but selectivity needs to be improved. Here we elucidate the role of the Pt oxidation state on the activity and selectivity of electrocatalytic oxidation of glucose with a new analytical approach, using high‐pressure liquid chromatography and high‐pressure anion exchange chromatography. It was found that the type of oxidation, i.e. dehydrogenation of primary and secondary alcohol groups or oxygen transfer to aldehyde groups, strongly depends on the Pt oxidation state. Pt0 has a 7‐fold higher activity for dehydrogenation reactions than for oxidation reactions, while PtOx is equally active for both reactions. Thus, Pt0 promotes glucose dialdehyde formation, while PtOx favors gluconate formation. The successive dehydrogenation of gluconate is achieved selectively at the primary alcohol group by Pt0, while PtOx also promotes the dehydrogenation of secondary alcohol groups, resulting in more complex reaction mixtures.

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“…The mono-metallic materials are considered to be the simplest materials for the electro-oxidation of glucose. It is widely known that the electroactivity alters with the crystalline planes [145][146][147][148][149][150][151][152]. For the effective utilization of the electrocatalytic activity of the electroactive materials, controlling the growth of the crystalline for promoting the electrocatalytic activity has attracted much attention.…”

Section: Crystal Structure Controlled Pd Nanocubesmentioning

confidence: 99%

Developments of the Electroactive Materials for Non-Enzymatic Glucose Sensing and Their Mechanisms

et al. 2021

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A comprehensive review of the electroactive materials for non-enzymatic glucose sensing and sensing devices has been performed in this work. A general introduction for glucose sensing, a facile electrochemical technique for glucose detection, and explanations of fundamental mechanisms for the electro-oxidation of glucose via the electrochemical technique are conducted. The glucose sensing materials are classified into five major systems: (1) mono-metallic materials, (2) bi-metallic materials, (3) metallic-oxide compounds, (4) metallic-hydroxide materials, and (5) metal-metal derivatives. The performances of various systems within this decade have been compared and explained in terms of sensitivity, linear regime, the limit of detection (LOD), and detection potentials. Some promising materials and practicable methodologies for the further developments of glucose sensors have been proposed. Firstly, the atomic deposition of alloys is expected to enhance the selectivity, which is considered to be lacking in non-enzymatic glucose sensing. Secondly, by using the modification of the hydrophilicity of the metallic-oxides, a promoted current response from the electro-oxidation of glucose is expected. Lastly, by taking the advantage of the redistribution phenomenon of the oxide particles, the usage of the noble metals is foreseen to be reduced.

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Investigation of reactivity of Pt basal planes towards glucose electro-oxidation in neutral solution (pH 7): structure-sensitivity dependence and mechanistic study

Cited by 18 publications

References 51 publications

Steering the Selectivity of Electrocatalytic Glucose Oxidation by the Pt Oxidation State

Steering the Selectivity of Electrocatalytic Glucose Oxidation by the Pt Oxidation State

Steering the Selectivity of Electrocatalytic Glucose Oxidation by the Pt Oxidation State

Developments of the Electroactive Materials for Non-Enzymatic Glucose Sensing and Their Mechanisms

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