Hydrofluoric acid-free etched MAX on 3D-printed nanocarbon electrode for photoelectrochemical hydrogen production

Nouseen, Shaista; Ghosh, Kalyan; Pumera, Martin

doi:10.1016/j.apmt.2023.101995

Applied Materials Today

2024

DOI: 10.1016/j.apmt.2023.101995

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Hydrofluoric acid-free etched MAX on 3D-printed nanocarbon electrode for photoelectrochemical hydrogen production

Shaista Nouseen,

Kalyan Ghosh,

Martin Pumera

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2024

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Cited by 5 publications

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Nanoarchitectonics of Laser Induced MAX 3D‐Printed Electrode for Photo‐Electrocatalysis and Energy Storage Application with Long Cyclic Durability of 100 000 Cycles

Nouseen,

Deshmukh,

Pumera

2024

Adv Funct Materials

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Abstract3D printing, a rapidly expanding domain of additive manufacturing, enables the fabrication of intricate 3D structures with adjustable fabrication parameters and scalability. Nonetheless, post‐fabrication, 3D‐printed materials often require an activation step to eliminate non‐conductive polymers, a process traditionally achieved through chemical, thermal, or electrochemical methods. These conventional activation techniques, however, suffer from inefficiency and inconsistent results. In this study, a novel chemical‐free activation method employing laser treatment is introduced. This innovative technique effectively activates 3D‐printed electrodes, which are then evaluated for their photo and electrochemical performance against traditional solvent‐activated counterparts. The method not only precisely ablates surplus non‐conductive polymers but also exposes and activates the underlying electroactive materials. The 3D‐printed electrodes, processed with this single‐step laser approach, exhibit a notably low overpotential of ≈505 mV at a current density of −10 mA cm−2 under an illumination wavelength of 365 nm. These electrodes also demonstrate exceptional durability, maintaining stability through >100 000 cycles in energy storage applications. By amalgamating 3D printing with laser processing, the creation of electrodes with complex structures and customizable properties is enabled. This synergy paves the way for streamlined production of such devices in the field of energy conversion and storage.

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Nanoarchitectonics of Laser Induced MAX 3D‐Printed Electrode for Photo‐Electrocatalysis and Energy Storage Application with Long Cyclic Durability of 100 000 Cycles

Nouseen,

Deshmukh,

Pumera

2024

Adv Funct Materials

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Efficient Photocatalytic Degradation of Humic Acid in Water Using N‐Doped Ti₃AlC₂ MAX

Wang,

Rau,

Mao

et al. 2024

ChemistrySelect

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Humic acid (HA) is the main precursor of carcinogenic compounds such as trichloromethane, which form during the disinfection of drinking water. Therefore, removing HA from water sources is crucial for producing safe drinking water. This study introduces a novel approach using dilute nitric acid as a nitrogen source to dope pristine Ti3AlC2 (TAC) to varying degrees, enhancing the material‘s photocatalytic degradation performance for HA. Characterisations through X‐ray diffraction, Fourier transform infrared, scanning electron microscopy, UV–vis and X‐ray photoelectron spectroscopy revealed that the surface morphology of the modified catalyst changed from an original blocky lamellar structure to a rod‐like cluster structure, which is advantageous for light trapping. In addition, the incorporation of nitrogen reduced the band gap of the material from 1.25 to 1.15 eV, considerably enhancing its overall light responsiveness and thereby improving its photocatalytic performance. The results demonstrated that the photocatalytic degradation efficiency of HA by TAC under optimal conditions reached 93.8 %, which is 4.3 times higher than the 21.8 % efficiency achieved using the undoped TAC material. The enhanced photocatalytic activity is attributed to N doping, which not only reduces the TiO2 band gap at the TAC surface but also improves the electrochemical behaviour of TAC. This results in enhanced light response and more efficient separation of photogenerated electron–hole pairs. The mechanism for CTAC–Nx photocatalytic degradation of HA was investigated using trapping agent experiments, revealing that the primary active substance responsible for the degradation is O2−.

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Aqueous Multivalent Metal‐ion Batteries: Toward 3D‐printed Architectures

De,

Pumera

2024

Small

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Energy storage has become increasingly crucial, necessitating alternatives to lithium‐ion batteries due to critical supply constraints. Aqueous multivalent metal‐ion batteries (AMVIBs) offer significant potential for large‐scale energy storage, leveraging the high abundance and environmentally benign nature of elements like zinc, magnesium, calcium, and aluminum in the Earth's crust. However, the slow ion diffusion kinetics and stability issues of cathode materials pose significant technical challenges, raising concerns about the future viability of AMVIB technologies. Recent research has focused on nanoengineering cathodes to address these issues, but practical implementation is limited by low mass‐loading. Therefore, developing effective engineering strategies for cathode materials is essential. This review introduces the 3D printing‐enabled structural design of cathodes as a transformative strategy for advancing AMVIBs. It begins by summarizing recent developments and common challenges in cathode materials for AMVIBs and then illustrates various 3D‐printed cathode structural designs aimed at overcoming the limitations of conventional cathode materials, highlighting pioneering work in this field. Finally, the review discusses the necessary technological advancements in 3D printing processes to further develop advanced 3D‐printed AMVIBs. The reader will receive new fresh perspective on multivalent metal‐ion batteries and the potential of additive technologies in this field.

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Hydrofluoric acid-free etched MAX on 3D-printed nanocarbon electrode for photoelectrochemical hydrogen production

Cited by 5 publications

References 63 publications

Nanoarchitectonics of Laser Induced MAX 3D‐Printed Electrode for Photo‐Electrocatalysis and Energy Storage Application with Long Cyclic Durability of 100 000 Cycles

Nanoarchitectonics of Laser Induced MAX 3D‐Printed Electrode for Photo‐Electrocatalysis and Energy Storage Application with Long Cyclic Durability of 100 000 Cycles

Efficient Photocatalytic Degradation of Humic Acid in Water Using N‐Doped Ti₃AlC₂ MAX

Aqueous Multivalent Metal‐ion Batteries: Toward 3D‐printed Architectures

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Hydrofluoric acid-free etched MAX on 3D-printed nanocarbon electrode for photoelectrochemical hydrogen production

Cited by 5 publications

References 63 publications

Nanoarchitectonics of Laser Induced MAX 3D‐Printed Electrode for Photo‐Electrocatalysis and Energy Storage Application with Long Cyclic Durability of 100 000 Cycles

Nanoarchitectonics of Laser Induced MAX 3D‐Printed Electrode for Photo‐Electrocatalysis and Energy Storage Application with Long Cyclic Durability of 100 000 Cycles

Efficient Photocatalytic Degradation of Humic Acid in Water Using N‐Doped Ti3AlC2 MAX

Aqueous Multivalent Metal‐ion Batteries: Toward 3D‐printed Architectures

Contact Info

Product

Resources

About

Efficient Photocatalytic Degradation of Humic Acid in Water Using N‐Doped Ti₃AlC₂ MAX