Layer-by-layer assemblies of highly connected polyelectrolyte capped-Pt nanoparticles for electrocatalysis of hydrogen evolution reaction

Fenoy, Gonzalo E.; Maza, Eliana; Zelaya, Eugenia; Marmisollé, Waldemar A.; Azzaroni, Omar

doi:10.1016/j.apsusc.2017.04.086

Cited by 30 publications

(25 citation statements)

References 54 publications

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“…In recent years, the modification of solid‐state nanopores via polyelectrolyte assembly/adsorption has gained increasing interest . The LbL assembly of polyelectrolytes represents a very simple and versatile chemical method to create functional thin films with nanoscale precision . This functionalization method is based on the alternate deposition of polyanions and polycations on solid surfaces leading to the formation of polyelectrolyte multilayers .…”

Section: Functionalization Of Solid‐state Nanoporesmentioning

confidence: 99%

Molecular Design of Solid‐State Nanopores: Fundamental Concepts and Applications

et al. 2019

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Solid‐state nanopores are fascinating objects that enable the development of specific and efficient chemical and biological sensors, as well as the investigation of the physicochemical principles ruling the behavior of biological channels. The great variety of biological nanopores that nature provides regulates not only the most critical processes in the human body, including neuronal communication and sensory perception, but also the most important bioenergetic process on earth: photosynthesis. This makes them an exhaustless source of inspiration toward the development of more efficient, selective, and sophisticated nanopore‐based nanofluidic devices. The key point responsible for the vibrant and exciting advance of solid nanopore research in the last decade has been the simultaneous combination of advanced fabrication nanotechnologies to tailor the size, geometry, and application of novel and creative approaches to confer the nanopore surface specific functionalities and responsiveness. Here, the state of the art is described in the following critical areas: i) theory, ii) nanofabrication techniques, iii) (bio)chemical functionalization, iv) construction of nanofluidic actuators, v) nanopore (bio)sensors, and vi) commercial aspects. The plethora of potential applications once envisioned for solid‐state nanochannels is progressively and quickly materializing into new technologies that hold promise to revolutionize the everyday life.

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Section: Functionalization Of Solid‐state Nanoporesmentioning

confidence: 99%

Molecular Design of Solid‐State Nanopores: Fundamental Concepts and Applications

et al. 2019

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“…The inclusion of metal nanoparticles via LbL procedure enabled the synthesis of materials for unusual applications too. Electroactive (2 nm in diameter) polyelectrolyte-capped Pt nanoparticles assembled into LbL arrays have been used in catalytic production of H 2 [106]. Photocatalytic reduction [107] of noble metal particles on titania core [95] leads to dual-wavelength responsiveness: in the UV to near-IR regions of electromagnetic spectrum.…”

Section: Corrosion Protection Of the Coatingsmentioning

confidence: 99%

Nanoparticles in Polyelectrolyte Multilayer Layer-by-Layer (LbL) Films and Capsules—Key Enabling Components of Hybrid Coatings

Lengert

Kol'tsov²,

et al. 2020

Coatings

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Originally regarded as auxiliary additives, nanoparticles have become important constituents of polyelectrolyte multilayers. They represent the key components to enhance mechanical properties, enable activation by laser light or ultrasound, construct anisotropic and multicompartment structures, and facilitate the development of novel sensors and movable particles. Here, we discuss an increasingly important role of inorganic nanoparticles in the layer-by-layer assembly—effectively leading to the construction of the so-called hybrid coatings. The principles of assembly are discussed together with the properties of nanoparticles and layer-by-layer polymeric assembly essential in building hybrid coatings. Applications and emerging trends in development of such novel materials are also identified.

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“…The LbL assembly was started by immersing the substrates in a 1 mg mL -1 PEI solution for 10 minutes. 52 After that, the substrates were washed with DI water for 5 minutes. Then, the substrates were alternatively dipped in a Pani-PSS and PAH-ZIF-8 (or PAH) colloidal suspensions for 15 minutes with a washing step in DI water before the next growth step (Scheme 1).…”

Section: Layer-by-layer Assemblymentioning

confidence: 99%

“…In order to achieve this end, we first synthesized colloidal suspensions of both, Pani-PSS negatively charged electroactive polymer, and PAH-stabilized (Polyallylamine hydrochloride) positively charged colloidal suspensions of ZIF-8 MOF (a Zn-based archetypal Zeolitic Imidazolate microporous material, which was already shown to act as ORR enhancer). 20,52 ZIF-8 can be described as an infinite network of Zn 2+ ions tetrahedrally coordinated with 2-methylimidazolate N-bidentate organic linkers, featuring high BET surface area (≈ 1500-1800 m 2 g -1 ), and good resistance towards hydrolysis in moderate pH aqueous environments and ionic strengths. 53,54 We show for the first time that a LbL architecture is achievable using these presynthesized nanostructures; and moreover, that these films feature electrochemical activity and can act as enhancers of the neutral pH electrochemical ORR due to a synergetic effect between high surfacearea porous material and electroactive conductive polymer, offering thus a cost-effective alternative to precious metal catalysts usually employed in energy conversion devices.…”

Section: Introductionmentioning

confidence: 99%

Layer-by-layer integration of conducting polymers and metal organic frameworks onto electrode surfaces: enhancement of the oxygen reduction reaction through electrocatalytic nanoarchitectonics

Mártire

Segovia

Azzaroni

et al. 2019

Mol. Syst. Des. Eng.

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Layer-by-layer assemblies of highly connected polyelectrolyte capped-Pt nanoparticles for electrocatalysis of hydrogen evolution reaction

Cited by 30 publications

References 54 publications

Molecular Design of Solid‐State Nanopores: Fundamental Concepts and Applications

Molecular Design of Solid‐State Nanopores: Fundamental Concepts and Applications

Nanoparticles in Polyelectrolyte Multilayer Layer-by-Layer (LbL) Films and Capsules—Key Enabling Components of Hybrid Coatings

Layer-by-layer integration of conducting polymers and metal organic frameworks onto electrode surfaces: enhancement of the oxygen reduction reaction through electrocatalytic nanoarchitectonics

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