A direct comparison of 2D versus 3D diffusion analysis at nanowire electrodes: A finite element analysis and experimental study

O'Sullivan, Benjamin; O’Sullivan, Shane; Narayan, Tarun; Patella, Bernardo; Seymour, Ian; Inguanta, Rosalinda; O’Riordan, Alan

doi:10.1016/j.electacta.2022.139890

Cited by 16 publications

(9 citation statements)

References 38 publications

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“…Ion transfer inside the electrolyte was computed employing the Nernst-Planck equation. [27] In the simulation, the oxidation-reduction reactions of Cu ions were generated at the WE and the CE, respectively.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

Room-temperature power generation of Ge-sensitized thermal cells with interdigitated array electrodes

Matsushita,

Kohata,

Obinata

et al. 2024

Preprint

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A semiconductor-sensitized thermal cell (STC) is a new thermal energy conversion technology that generates electricity using the redox reactions of electrolyte ions with thermally excited carriers in semiconductors. A characteristic feature of STC is the restoration phenomena of battery characteristics in heat due to the electrolyte ion diffusion. This study employed interdigitated array electrodes with extremely narrow electrode distances (several micro m) to clarify the role of ion diffusion, leading to electric power generation at an ambient temperature of 30℃.

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Section: Electrochemical Measurementmentioning

confidence: 99%

Room-temperature power generation of Ge-sensitized thermal cells with interdigitated array electrodes

Matsushita,

Kohata,

Obinata

et al. 2024

Preprint

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“…In fact, as demonstrated in [ 56 , 57 , 58 , 59 , 60 , 61 , 62 ], due to the high surface area, the electrodes based on the arrays of nanowires showed very good performance compared to the planar ones. This is generally true for all electrochemical devices with nanostructured electrodes [ 4 , 63 ] such as batteries [ 64 , 65 , 66 ], sensors [ 67 , 68 , 69 , 70 ], supercapacitors [ 71 , 72 , 73 ] and solar cells [ 74 , 75 , 76 ].…”

Section: Introductionmentioning

confidence: 99%

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

et al. 2023

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To realize the benefits of a hydrogen economy, hydrogen must be produced cleanly, efficiently and affordably from renewable resources and, preferentially, close to the end-users. The goal is a sustainable cycle of hydrogen production and use: in the first stage of the cycle, hydrogen is produced from renewable resources and then used to feed a fuel cell. This cycle produces no pollution and no greenhouse gases. In this context, the development of electrolyzers producing high-purity hydrogen with a high efficiency and low cost is of great importance. Electrode materials play a fundamental role in influencing electrolyzer performances; consequently, in recent years considerable efforts have been made to obtain highly efficient and inexpensive catalyst materials. To reach both goals, we have developed electrodes based on Pd–Co alloys to be potentially used in the PEMEL electrolyzer. In fact, the Pd–Co alloy is a valid alternative to Pt for hydrogen evolution. The alloys were electrodeposited using two different types of support: carbon paper, to fabricate a porous structure, and anodic alumina membrane, to obtain regular arrays of nanowires. The goal was to obtain electrodes with very large active surface areas and a small amount of material. The research demonstrates that the electrochemical method is an ideal technique to obtain materials with good performances for the hydrogen evolution reaction. The Pd–Co alloy composition can be controlled by adjusting electrodeposition parameters (bath composition, current density and deposition time). The main results concerning the fabrication process and the characterization are presented and the performance in acid conditions is discussed.

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“…Electrochemical analysis is a good alternative for phosphate detection as it is timeefficient [6], cost-effective [7], easy-to-operate [8], and portable [9]. Different types of electrodes have been studied for phosphate detection including metals [10,11], polymers [12,13], and enzyme based electrodes [14].…”

Section: Introductionmentioning

confidence: 99%

Real-time Electrochemical Sensor for Phosphate Sensing in Soil-Water

Narayan,

Reidy,

Heelan

et al. 2023

Preprint

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The increasing global population is putting huge pressure on food production system. The improper use of fertilizers, in particular, is contributing to climate change and biodiversity loss. Existing soil monitoring techniques have serious shortcomings as they are lab based and have slow turnaround times. New digital approaches are therefore urgently required to provide timely, actionable, local data on soil and water quality across each field on a farm to maximize crop yield, eliminate waste and minimize environmental pollution. To this end, we present a reagent-free, easy-use, cost-effective, accurate electrochemical phosphate sensor with a limit of detection of 10.4 nM and sensitivity of 1.18 A/nM to allow continuously, in-field soil phosphate monitoring.

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A direct comparison of 2D versus 3D diffusion analysis at nanowire electrodes: A finite element analysis and experimental study

Cited by 16 publications

References 38 publications

Room-temperature power generation of Ge-sensitized thermal cells with interdigitated array electrodes

Room-temperature power generation of Ge-sensitized thermal cells with interdigitated array electrodes

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

Real-time Electrochemical Sensor for Phosphate Sensing in Soil-Water

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