3D-printed electrodes for the detection of mycotoxins in food

Nasir, Muhammad Zafir Mohamad; Novotný, Filip; Alduhaish, Osamah; Pumera, Martin

doi:10.1016/j.elecom.2020.106735

Cited by 29 publications

(19 citation statements)

References 32 publications

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“…For pristine AE‐MoS x , an LSV from ≈0 V to 1.2 V (vs SCE) reveals a broad anodic feature, in the 0.2– 1.1 V voltage range, with its peak at ≈0.7 V when tested in a 0.5 m H 2 SO 4 electrolyte ( Figure 4 a). Plotting the electro‐oxidation band peak potential as a function of the pH gives an experimental gradient of −27 mV dec −1 , which closely matches the −29.5 mV dec −1 theoretical Nernstian slope characteristic of a 1 H + : 2e − PCET electro‐oxidation mechanism (Figure b), in agreement with literature results for crystalline MoS 2 materials ascribed to the oxidation of the Mo 4+ moieties to Mo 6+ . To the best of our knowledge, our investigation is the first to experimentally support the 1 H + : 2e − PCET electro‐oxidation mechanism for pristine AE‐MoS x (detailed discussion of the electrochemical features is provided in Section S2.4, Supporting Information).…”

Section: Resultssupporting

confidence: 89%

“…This is in excellent agreement with a 1 H + : 1e − (or subsequent multiples) PCET electro‐oxidation mechanism. However, this does not satisfy the widely established 1 H + : 2e − PCET mechanism under which the irreversible electro‐oxidation of MoS 2 materials to Mo 6+ is reported to proceed, as this would give a theoretical Nernstian slope of −29.5 mV dec −1 …”

Section: Resultsmentioning

confidence: 71%

“…Indeed, dramatic pH‐dependent effects in crystalline MoS 2 HER performance, inherent electrochemistry and fluorescence have been reported . Although preliminary pH studies on electrodeposited MoS x are available, none have proposed a unified approach to maximize the HER electrocatalysis of electrodeposited MoS x accounting for modifications in pH‐dependent surface properties.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Benchmarking the Activity, Stability, and Inherent Electrochemistry of Amorphous Molybdenum Sulfide for Hydrogen Production

Escalera‐López

Lou

Rees

2019

Advanced Energy Materials

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can be efficiently produced on demand and in a decentralized manner with (photo) electrochemical methods via the hydrogen evolution reaction (HER). [1][2][3][4] Despite of being the best performing HER catalysts, [5,6] noble metals such as Pt, Ir, and Pd are scarce and consequently hamper the viability of water electrolysis technologies. Hence earth-abundant materials, and notably transition metal dichalcogenides (TMDs) such as molybdenum disulfide (MoS 2 ), have been extensively investigated as HER electrocatalysts. [7][8][9][10][11] The edge sites-driven hydrogen electroadsorption properties of TMDs [12,13] have prompted the fabrication of amorphous molybdenum sulfide materials (MoS x ) to minimize exposure of the electrocatalytically inert MoS 2 basal planes [14] for multiple applications. [15][16][17][18][19] A simple, yet scalable method to fabricate MoS x has been reported by substrate-insensitive electrodeposition from a [MoS 4 ] 2− precursor, [20,21] and critical properties in MoS x materials such as film thickness, [22] morphology, [23][24][25][26] Mo:S stoichiometry, [27] as well as incorporation of dopants [28][29][30] or nanocomposite formation, [31][32][33][34][35] have been easily tuned by experimental parameters.For long-term electrocatalytic applications, however, HER activity and stability of TMDs are paramount. In crystalline MoS 2 , basal plane activation, [36][37][38][39][40][41][42][43] edge site exposure, [44][45][46][47][48][49][50][51][52][53] and metal doping/incorporation/intercalation [54][55][56][57][58][59][60][61][62][63][64][65][66] are the most employed strategies.In contrast, the [Mo 3 S 13 ] 2− cluster-based polymeric structure of electrodeposited MoS x[67] requires alternative approaches to maximize activity. In addition, the detailed HER mechanism as well as the true catalytically active sites are still under debate. Whilst pioneering studies on ambient pressure X-ray photoelectron spectroscopy (XPS) indicated the MoS 2 edge-like sites formed after MoS 3 phase transformation under in operando conditions responsible for the HER performance, [68] in situ X-ray absorption spectroscopy experiments suggested terminal S 2 2− ligands (S 2 2− terminal ) to be the proton acceptor sites, [69] and more recently in situ Raman spectroscopy indicated these to be the electrochemically cleaved bridging S 2 2− ligands (S 2 2− bridging ). [70] Another study claimed that unsaturated Mo centers formed after cathodic dissolution of S 2 2− terminal to be the true HER Anodically electrodeposited amorphous molybdenum sulfide (AE-MoS x ) has attracted significant attention as a non-noble metal electrocatalyst for its high activity toward the hydrogen evolution reaction (HER). The [Mo 3 S 13 ] 2− polymerbased structure confers a high density of exposed sulfur moieties, widely regarded as the HER active sites. However, their intrinsic complexity conceals full understanding of their exact role in HER catalysis, hampering their full potential for water splitting applications. In this report, a unifying app...

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Benchmarking the Activity, Stability, and Inherent Electrochemistry of Amorphous Molybdenum Sulfide for Hydrogen Production

Escalera‐López

Lou

Rees

2019

Advanced Energy Materials

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“…The developed electrochemical sensors have been studied as electrochemical sensing devices in many analytes of interests, including in detecting metals ions, 33,34 picric and ascorbic acids, 35 uric acid, 31 and mycotoxin compound. 36 Based on our literature search, at present, as discussed in the previous section before the 3D-printed carbon nanomaterial electrodes were utilised as electrochemical sensor devices, the electrochemical activities of the polymer/carbon nanomaterial 3D-printed electrodes were electrochemically optimised either with the printing orientations or pre-treating the 3D-printed electrode surfaces with chemical substances.…”

Section: Polymer/carbon Nanomaterials 3d-printed Electrodes For Elect...mentioning

confidence: 99%

“…Meanwhile, Pumera et al 36 have printed PLA/graphene 3D-printed electrode to detect a mycotoxin of zearalenone (ZEA) compound. Like in their previous work, 35 the authors treated the PLA/graphene 3D-printed electrodes before using them as electrodesensors.…”

Section: Polymer/carbon Nanomaterials 3d-printed Electrodes For Elect...mentioning

confidence: 99%

Recent progress of conductive 3D-printed electrodes based upon polymers/carbon nanomaterials using a fused deposition modelling (FDM) method as emerging electrochemical sensing devices

et al. 2021

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Advances in Designing 3D‐Printed Systems for CO₂ Reduction

Kumar

Pumera

2023

Adv Materials Inter

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The increasing level of atmospheric carbon dioxide (CO2), and the resultant global warming is a matter of growing concern among scientists, environmentalists, and climate experts across the globe over the past several decades. Numerous attempts are being undertaken today that seek solutions to mitigate this global crisis. This includes designing functional catalysts, devices and reactors to convert greenhouse gasses such as CO2 into useful products like low‐carbon fuels and chemicals, thereby reducing the amount of CO2 considerably in the atmosphere. Advancements in emerging technologies like 3D‐printing can effectively aid in the fabrication of electrodes and devices to tackle the rising CO2 concerns. Low cost, rapid prototyping ability, and printing simple and complex structure are few of the significant merits of this technology. Thus, in this perspective article, discussions on fabricating 3D‐printed (electro)catalysts, customized devices, reactors, etc., via multiple strategies are put forward with emphasis on the electrochemical reduction of CO2. Also, a detailed discussion on the post‐printing treatments, catalyst modifications, and other CO2 mitigation strategies is provided as well. Although studies in this direction are scarcely reported, observations made hitherto show promising possibilities of broadening this field for large scale CO2 reduction reaction applications, and similar catalytic applications in the near future.

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3D-printed electrodes for the detection of mycotoxins in food

Cited by 29 publications

References 32 publications

Benchmarking the Activity, Stability, and Inherent Electrochemistry of Amorphous Molybdenum Sulfide for Hydrogen Production

Benchmarking the Activity, Stability, and Inherent Electrochemistry of Amorphous Molybdenum Sulfide for Hydrogen Production

Recent progress of conductive 3D-printed electrodes based upon polymers/carbon nanomaterials using a fused deposition modelling (FDM) method as emerging electrochemical sensing devices

Advances in Designing 3D‐Printed Systems for CO₂ Reduction

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3D-printed electrodes for the detection of mycotoxins in food

Cited by 29 publications

References 32 publications

Benchmarking the Activity, Stability, and Inherent Electrochemistry of Amorphous Molybdenum Sulfide for Hydrogen Production

Benchmarking the Activity, Stability, and Inherent Electrochemistry of Amorphous Molybdenum Sulfide for Hydrogen Production

Recent progress of conductive 3D-printed electrodes based upon polymers/carbon nanomaterials using a fused deposition modelling (FDM) method as emerging electrochemical sensing devices

Advances in Designing 3D‐Printed Systems for CO2 Reduction

Contact Info

Product

Resources

About

Advances in Designing 3D‐Printed Systems for CO₂ Reduction