Assembly of nanoscale materials from nanoparticle (NP) building blocks relies on our understanding multiple forces acting between NPs. These may compete with each other and yield distinct stimuli-responsive self-assembled nanostructures. Here, we report structural transitions linear chains globular assemblies charged, polymer-stabilized gold NPs, which are governed by the competition repulsive electrostatic attractive poor solvency/hydrophobic forces. We propose a simple quantitative model...

Solution-based linear self-assembly of metal nanoparticles offers a powerful strategy for creating plasmonic polymers, which, so far, have been formed from spherical and cylindrical nanorods. Here we report solution-based nanocubes (NCs), examine the structural characteristics NC chains, demonstrate their advanced optical characteristics. In comparison with chains nanospheres similar dimensions, composition, surface chemistry, predominant face-to-face assembly large NCs coated short polymer...

Optimizing CO2 electrolyzer cell voltage requirement: aqueous and organic reductive electrocatalysis paired with electrooxidation of urea ammonia.

Abstract The electrocatalyzed ammonia oxidation reaction (AOR) is a potential pathway toward waste remediation, energy generation, and the synthesis of value‐added products. To date, mechanistic studies have focused on elucidating progress AOR Pt‐based catalysts with an established for only. In this work, density functional theory was applied to determine lowest intermediates nitrogen gas, nitrite, nitrate formation ‐, promising electrocatalyst material AOR. It found that dinitrogen...

Significance Self-assembly of nanoparticles in polymer-like chains bears a strong similarity to polymerization reactions, which monomer units are brought together by directional noncovalent interactions. Based on this similarity, the molecular concepts polymer chemistry can be applied achieve controllable nanoparticle assembly. On other hand, ability visualize assemblies and exploit characterization tools used nanoscience offers unique way study reactions. Here we explore twofold strategy...

Frustrated Lewis pairs (FLPs) comprising sterically hindered acids and bases offer the capability to reversibly capture CO2 under mild reaction conditions. The determination of equilibrium constants thermodynamic properties these reactions should enable assessment efficiency a particular FLP system for sequestration provide insights design new, efficient formulations catalysts capture. We have developed microfluidic approach studies FLP-CO2 reactions, which provides their characterization...

The electrocatalyzed ammonia oxidation reaction (AOR) is an ambient temperature and pressure process with potential applications for sustainable energy generation waste treatment. In this work, we study the mechanism of toward N2, NO2–, NO3– on (0001)β-NiOOH surface compare computed free intermediates to results previously obtained (0001) β-Ni(OH)2. NiOOH surfaces a hydroxide vacancy favored NH2–NH2 coupling reduced theoretical onset formation relative β-Ni(OH)2 surface. oxygen NH–NH had...

Abstract Developing electrocatalysts for urea oxidation reaction (UOR) works toward sustainably treating urea‐enriched water. Without a clear understanding of how UOR products form, advancing catalyst performance is currently hindered. This work examines the thermodynamics pathways to produce N 2 , NO − and 3 on (0001) β ‐Ni(OH) surface using density functional theory with computational hydrogen electrode model. Our calculations show support two major experimental observations: (1) favours...

Linear assemblies of nanoparticles show promising applications due to their collective electronic, optical and magnetic properties. Rational design controllable organization in one-dimensional structures can strongly benefit from the marked similarity between conventional step-growth polymerization reactions directional step-wise assembly linear chains. Here we different aspects “polymerization” approach solution-based self-assembly polymer-functionalized metal with chemical compositions,...

The ammonia oxidation reaction (AOR) has applications as a sustainable energy source and in wastewater remediation. Nickel based catalysts for the AOR are ideal they cost efficient, have longer lifetimes than more expensive alternatives, can produce value-added products. Dopants be applied to these nickel further increase their value. This work explores effects on potentials when β-Ni(OH)2 is doped with chromium, cobalt, copper, or iron using density functional theory model AOR. Limiting...

Herein, we report on the facile synthesis of nanocomposite consisting TiO2 and Au nanoparticles (NPs) via a tailored galvanic replacement reaction (GRR). The electrocatalytic activity synthesized TiO2/Au nanocomposites for CO2 reduction was investigated in an aqueous solution using various electrochemical methods. Our results demonstrated that formed through GRR process exhibited improved catalytic activities reduction, while generating more hydrocarbon molecules than typical formation CO...

Chemical and topographic surface patterning of inorganic polymer-functionalized nanoparticles (NPs) their self-assembly in nanostructures with controllable architectures enable the design new NP-based materials. Capping NPs polymer ligands, such as metallopolymers, can lead to synergetic properties individual or assemblies, enhance NP processing functional Here, for gold functionalized polyferrocenylsilane, two distinct triggers are used induce attraction between ligands achieve...

Plasmonic metal nanostructures with complex morphologies provide an important route to tunable optical responses and local electric field enhancement at the nanoscale for a variety of applications including sensing, imaging, catalysis.

The adsorption of C60-malonic derivatives C61(CO2H)2 and C66(CO2H)12 on Au(111) a pentafluorobenzenethiol-modified Au substrate (PFBT@Au) has been investigated using scanning tunneling microscopy (STM) at liquid-solid interface. Monofunctionalized forms hexagonal close-packed overlayer individual aligned dimers PFBT@Au(111). difference is attributed to the nature substrateC61(CO2H)2 interaction (isotropic π-Au bonding vs. anisotropic PFBTCOOH interactions). Surprisingly, in both cases,...

We report plasmonically mediated enhancement of catalytic performance different Pd-based nanoparticles. Our findings pave the way for design, synthesis and fabrication Pd nanocatalysts with enhanced under visible light illumination.

The ammonia oxidation reaction is a of great interest for its potential to upcycle waste, creating fertilizer salts beneficial the agricultural industry. Currently, AOR catalysts typically suffer either from high onset potentials or catalyst poisoning, and better materials must be found in order viable large-scale production. Experimentally, it difficult study interactions adsorbates on surfaces an atomic level, whereas computational studies provide us with means this scale. In study, we use...

The ammonia oxidation reaction is a of great interest for its potential to upcycle waste, creating fertilizer salts beneficial the agricultural industry. Currently, AOR catalysts typically suffer either from high onset potentials or catalyst poisoning, and better materials must be found in order viable large-scale production. Experimentally, it difficult study interactions adsorbates on surfaces an atomic level, whereas computational studies provide us with means this scale. In study, we use...

The electrocatalyzed ammonia oxidation reaction (AOR) is a potential pathway toward waste remediation, energy generation, and the synthesis of value- added products. To date, mechanistic studies have focused on elucidating progress AOR Pt-based catalysts with an established for N2 only. In this work, density functional theory was applied to determine lowest intermediates towards nitrogen gas, nitrite, nitrate formation 𝛽-Ni(OH)2, promising electrocatalyst material AOR. It found that...

The electrocatalyzed ammonia oxidation reaction (AOR) is a potential pathway toward waste remediation, energy generation, and the synthesis of value- added products. To date, mechanistic studies have focused on elucidating progress AOR Pt-based catalysts with an established for N2 only. In this work, density functional theory was applied to determine lowest intermediates towards nitrogen gas, nitrite, nitrate formation 𝛽-Ni(OH)2, promising electrocatalyst material AOR. It found that...

Abstract Review: recent advances in the field of self‐assembled plasmonic nanostructures, their optical properties and applications; 186 refs.