Unravelling the last milliseconds of an individual graphene nanoplatelet before impact with a Pt surface by bipolar electrochemistry

Deng, Zejun; Renault, Christophe

doi:10.1039/d1sc03646g

Cited by 7 publications

(9 citation statements)

References 50 publications

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“…39 An electro-optical combined method has been devised to track the effect of near-wall hindered diffusion of individual graphene nanoplatelets by the correlation between microscopy and stochastic collision electrochemistry. 40 When a single nanoplatelet is just above the electrode surface, the nearwall hindered diffusion occurs on it, in turn to its deceleration. Inspired by eq 3, to control the diffusion of single entities, it may be a potent approach to devise strategies for controlling the near-wall hindered diffusion by regulating the size and D of entities.…”

Section: Stochastic Entitiesmentioning

confidence: 99%

Mass Transport and Electron Transfer at the Electrochemical-Confined Interface

Chen

Wang

et al. 2023

J. Phys. Chem. Lett.

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Single entity measurements based on the stochastic collision electrochemistry provide a promising and versatile means to study single molecules, single particles, single droplets, etc. Conceptually, mass transport and electron transfer are the two main processes at the electrochemically confined interface that underpin the most transient electrochemical responses resulting from the stochastic and discrete behaviors of single entities at the microscopic scale. This perspective demonstrates how to achieve controllable stochastic collision electrochemistry by effectively altering the two processes. Future challenges and opportunities for stochastic collision electrochemistry are also highlighted.

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Section: Stochastic Entitiesmentioning

confidence: 99%

Mass Transport and Electron Transfer at the Electrochemical-Confined Interface

Chen

Wang

et al. 2023

J. Phys. Chem. Lett.

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“…Deng et al. [47] have developed a bipolar electrochemical method with a milliseconds‐time resolution to monitor the velocity of individual conductive particles before hitting the electrodes. Based on physical models and numerical simulations, the key parameters affecting the amplitude and shape of current transients are explained in detail.…”

Section: Analytical Application For Single Entitiesmentioning

confidence: 99%

Bipolar Electrochemistry – A Powerful Tool for Micro/Nano‐Electrochemistry

2022

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The understanding of areas for “classical” electrochemistry (including catalysis, electrolysis and sensing) and bio‐electrochemistry at the micro/nanoscale are focus on the continued performance facilitations or the exploration of new features. In the recent 20 years, a different mode for driving electrochemistry has been proposed, which is called as bipolar electrochemistry (BPE). BPE has garnered attention owing to the interesting properties: (i) its wireless nature facilitates electrochemical sensing and high throughput analysis; (ii) the gradient potential distribution on the electrodes surface is a useful tool for preparing gradient surfaces and materials. These permit BPE to be used for modification and analytical applications on a micro/nanoscale surface. This review aims to introduce the principle and classification of BPE and BPE at micro/nanoscale; sort out its applications in electrocatalysis, electrosynthesis, electrophoresis, power supply and so on; explain the confined BPE and summarize its analytical application for single entities (single cells, single particles and single molecules), and discuss finally the important direction of micro/nanoscale BPE.

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“…[37][38][39] Besides, these reactions were inspected at a variety of NPs such as metals (Pd, [29] Pt, [27,30,34,36,37,39] Au, [30,31] ), metal oxides (CoFe 2 O 4 , [25] IrO x, [35] Pt@TiO 2, [28] Ni(OH) 2 [40] ) or carbon materials. [24,41,42] The electrocatalytic activity of a NP is detected by an abrupt increase of the current, the height of which reflects the electrocatalytic efficiency, the dynamics (passivation, etc.) [30] at the single NP level, [29] or the NP active area.…”

Section: Introductionmentioning

confidence: 99%

“…Many electrocatalytic reactions have been inspected including the oxygen evolution, [25,26] or reduction, [27,28] hydrogen evolution, [29–33] or oxidation, [34] hydrogen peroxide oxidation [35] and reduction, [36] and hydrazine oxidation reactions [37–39] . Besides, these reactions were inspected at a variety of NPs such as metals (Pd, [29] Pt, [27,30,34,36,37,39] Au, [30,31] ), metal oxides (CoFe 2 O 4 , [25] IrO x, [35] Pt@TiO 2, [28] Ni(OH) 2 [40] ) or carbon materials [24,41,42] . The electrocatalytic activity of a NP is detected by an abrupt increase of the current, the height of which reflects the electrocatalytic efficiency, the dynamics (passivation, etc.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Electrode Activity to Expose Transformational and Electrocatalytic Characteristics of Individual Nanoparticles by Nanoimpact Electrochemistry

et al. 2022

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Nanoimpact electrochemistry (NIE) is a straightforward analytical technique to study at high throughput the reactivity of single nanoparticles (NPs) colliding with a biased ultramicroelectrode (UME). As NIE can reveal both NP size and catalytic activity, this strategy can be employed to establish relationships between these two NP descriptors. Herein, it is shown that the electrode material is crucial for visualizing simultaneously electrocatalytic processes and NP transformation, which can size the NPs. UMEs made of gold (Au) or glassy carbon (GC), were employed to study the reduction of AgBr NPs and the electrocatalytic activity of the resulting Ag NPs for the oxygen reduction reaction (ORR). With Au UME, only the transformation process is probed, allowing a quantitative analysis of the overpotential effect on the reduction dynamics of the AgBr NPs. When a GC UME is employed, the AgBr NPs reduction and subsequent ORR activity can be quantified for the very same NPs.

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Unravelling the last milliseconds of an individual graphene nanoplatelet before impact with a Pt surface by bipolar electrochemistry

Abstract: Contact-less interactions of micro/nano-particles near electrochemically or chemically active interfaces are ubiquitous in chemistry and biochemistry. Forces arising from a convective field, an electric field or chemical gradients act on...

Cited by 7 publications

References 50 publications

Mass Transport and Electron Transfer at the Electrochemical-Confined Interface

Mass Transport and Electron Transfer at the Electrochemical-Confined Interface

Bipolar Electrochemistry – A Powerful Tool for Micro/Nano‐Electrochemistry

Tuning the Electrode Activity to Expose Transformational and Electrocatalytic Characteristics of Individual Nanoparticles by Nanoimpact Electrochemistry

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