Collisional electrochemistry of laser-ablated gold nanoparticles by electrocatalytic oxidation of glucose

Liu, Yang; Austen, Benjamin J.J.; Cornwell, Thomas; Tilbury, Rhys D.; Buntine, Mark A.; O’Mullane, Anthony P.; Arrigan, Damien W. M.

doi:10.1016/j.elecom.2017.02.009

Cited by 17 publications

(6 citation statements)

References 28 publications

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“…8 However, we did not observe any current transients when only OHand AuNPs were present in the solution (Figure S7B). Thus, both AuNPs and glucose are required to observe catalytic currents in the dark (in agreement with earlier reported collision electrochemistry of AuNPs 36 ) and under illumination. The collision frequency scales linearly with the particle concentration (Figure S8), indicating that detected signals correspond to nano-impacts of single particles.…”

Section: Resultssupporting

confidence: 89%

Nano-impact single-entity electrochemistry enables plasmon-enhanced electrocatalysis

Ganguli

Zhao

Parlak

et al. 2023

Preprint

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Plasmon-enhanced electrocatalysis (PEEC) based on a combination of localized surface plasmon resonance excitation and electrochemical bias applied to plasmonic material can result in improved electrical-to-chemical energy conversion compared to conventional electrocatalysis. Here, we demonstrate the advantages of nano-impact single-entity electrochemistry (SEE) for investigating the intrinsic activity of plasmonic catalysts at the single-particle level using glucose electrooxidation on gold nanoparticles as a model reaction. We show that in conventional ensemble measurements, plasmonic effects have minimal impact on photocurrent because the Fermi level of the deposited gold nanoparticles continuously equilibrates with the working electrode potential, leading to fast neutralization of hot carriers by the measuring circuit. The photocurrents detected in these measurements are caused by photo-induced heating of carbon-based electrodes. In SEE, the Fermi level of diffused gold nanoparticles is unaffected by the working electrode potential. As a result, plasmonic effects are the dominant source of photocurrents in SEE.

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Section: Resultssupporting

confidence: 89%

Nano-impact single-entity electrochemistry enables plasmon-enhanced electrocatalysis

Ganguli

Zhao

Parlak

et al. 2023

Preprint

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“…A key challenge however is to minimize the total amount of gold used, due to expense as well as the size of the particles to enhance HER activity as it is well established that gold in the nanoparticle form is an excellent electrocatalyst . Galvanic replacement is a highly effective but simple approach to reduce the amount of metal deposited on the surface of a redox active support material .…”

Section: Introductionmentioning

confidence: 99%

Gold Doping in a Layered Co‐Ni Hydroxide System via Galvanic Replacement for Overall Electrochemical Water Splitting

Sultana

Riches

O’Mullane

2018

Adv Funct Materials

Self Cite

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The development of active yet stable bifunctional materials to produce hydrogen and oxygen via electrochemical water splitting is an ongoing challenge. Here, a system based on electrodeposited Ni(OH) 2 and Co(OH) 2 containing highly distributed gold nanoparticles at less than 0.25 at% to facilitate the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under alkaline conditions is developed. The key aspect is using galvanic replacement to deposit gold on a layer of electrodeposited Co(OH) 2 prior to electrodepositing Ni(OH) 2 . The fabrication of a composite system based on Co(OH) 2 -Au-Ni(OH) 2 is required for optimal activity for both the HER and OER. The composite is characterized with helium ion microscopy, transmission electron microscopy, depth profiling X-ray photoelectron microscopy, and a variety of electrochemical techniques. This material exceeds the activity of Pt for the HER at current densities greater than 40 mA cm −2 and is stable for both reactions for prolonged periods of electrolysis. In a two-electrode configuration, current densities greater than 175 mA cm −2 for overall water splitting could be readily achieved at an applied voltage of 1.90 V in a commercially relevant electrolyte of 6 m NaOH.

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“…Recently, Tian and Long et al proposed an ultrasensitive photoelectrochemical strategy extending the electron diffusion to a sub-milli-second scale, which provides a new insight into facilitating the fabrication of photoelectrochemical devices. Nowadays, numerous platforms including ultramicroelectrode and carbon nanopipettes [46] have been developed for electrocatalytic amplification and, such approach has been successfully applied on the detection of NADH [47] and glucose oxidation [48] by different nanoparticles. [29] Among these modes, electrocatalytic amplification has attracted much attention and extensively been investigated for its various signals with different types of particles.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Reduction of Hydrogen Peroxide by Pd−Ag Nanoparticles Based on the Collisional Approach

Zhang

et al. 2018

ChemElectroChem

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Particles collision onto a surface or an interface is a novel electrochemical approach, which can be used to investigate the behavior of single entities. Benefiting from advantages including single particle/single event resolution, label-free detection and high sensitivity, this technique has been widely employed in the study of electrocatalytic amplification of detection signal by nanoparticles. Herein, we report the investigation of the collisional electrocatalytic behaviors of novel PdÀ Ag hyperbranched nanoparticles through the observation of catalysis of hydrogen peroxide (H 2 O 2 ) oxidation. The newly prepared PdÀ Ag hyperbranched nanoparticles have been characterized by cyclic voltammetry and surface techniques. They can obviously reduce the overpotential of the reduction of H 2 O 2 and show the high electrocatalytic activity. When the nanoparticles collide onto the electrode via the Brownian random motion, electrocatalytic reaction occurs and results in significant current increases, which could provide information about nanoparticles and electrochemical reactions. Furthermore, concentration and potential dependence are also investigated in detail, which confirms the reliability and universality of this methodology as an ultra-sensitive probe. Based on these results, it is clearly shown that such platform is promising in further applications for biosensing and single nanoparticle analysis.

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Collisional electrochemistry of laser-ablated gold nanoparticles by electrocatalytic oxidation of glucose

Cited by 17 publications

References 28 publications

Nano-impact single-entity electrochemistry enables plasmon-enhanced electrocatalysis

Nano-impact single-entity electrochemistry enables plasmon-enhanced electrocatalysis

Gold Doping in a Layered Co‐Ni Hydroxide System via Galvanic Replacement for Overall Electrochemical Water Splitting

Electrocatalytic Reduction of Hydrogen Peroxide by Pd−Ag Nanoparticles Based on the Collisional Approach

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