Cost competitive electroreduction of CO2 to CO requires electrochemical systems that exhibit partial current density (jCO) exceeding 150 mA cm–2 at cell overpotentials (|ηcell|) less than 1 V. However, achieving such benchmarks remains difficult. Here, we report the on a supported gold catalyst in an alkaline flow electrolyzer with performance levels close economic viability criteria. Onset production occurred and cathode just −0.25 −0.02 V, respectively. High jCO (∼99, 158 cm–2) was...

A newly designed and fabricated novel nanocomposite composed of multiwalled carbon nanotubes (MWNTs), poly(benzimidazole) (PBI), Pt nanoparticles. This composite is by the preparation PBI-wrapped MWNTs (MWNT/PBI), followed loading onto MWNT/PBI. As a result PBI wrapping, efficiency nanoparticles dramatically improved up to 58.8% compared that pristine (41.0%). The process also allows homogeneous immobilization surface without any strong oxidation for typically used metal supporting on...

Direct conversion from heat to electricity is one of the important technologies for a sustainable society since large quantities energy are wasted as heat. We report development single-walled carbon nanotube (SWNT)-based high efficiency, air-stable and flexible thermoelectric material. prepared cobaltocene-encapsulated SWNTs (denoted CoCp2@SWNTs) revealed that material showed negative-type (n-type) semiconducting behaviour (Seebeck coefficient: −41.8 μV K−1 at 320 K). The CoCp2@SWNT film was...

Abstract Toward the next generation fuel cell systems, development of a novel electrocatalyst for polymer electrolyte (PEFC) is crucial to overcome drawbacks present electrocatalyst. As conductive supporting material catalyst, carbon nanotubes (CNTs) have emerged as promising candidate, and many attempts been carried out introduce CNT, in place black. On other hand, electrolyte, polybenzimidazoles (PBIs) recognized powerful candidate due high proton conductivity above 100 °C under non‐humid...

Abstract We now describe the finding that a copolymer of 9,9-dioctylfluorenyl-2,7-diyl and bipyridine (BPy) can extract in “one-pot” ≈96–97%-enriched (6,5)-SWNTs m-xylene p-xylene not containing metallic SWNTs, which was revealed by vis–near IR absorption, photoluminescence, Raman spectroscopies.

Single-walled carbon nanotubes (SWNTs) have remarkable and unique electronic, mechanical, thermal properties, which are closely related to their chiralities; thus, the chirality-selective recognition/extraction of SWNTs is one central issues in nanotube science. However, any rational materials design enabling efficiently extract/solubilize pure SWNT with a desired chirality has yet not been demonstrated. Herein we report that certain chiral polyfluorene copolymers can well-recognize...

Abstract Anion‐exchange membrane fuel cells (AEMFCs) have emerged as an alter‐native technology to overcome the technical and cost issues of proton‐exchange (PEMFCs). In this study, we describe a new electrocatalyst for AEMFCs composed carbon nanotubes (CNTs), KOH‐doped polybenzimidazole (PBI) platinum nanoparticles (Pt), in which CNTs are wrapped by PBI at nanometer thickness Pt is efficiently loaded on wrapping layer. electrocatalyst, it revealed that layer function electron‐...

Low durability of polymer electrolyte fuel cell (PEFC) is a major drawback that should be solved. Recent studies have revealed leaching liquid phosphoric acid (PA) from both membrane and catalyst layers causes inhomogeneous PA distribution results in deterioration PEFC performance during long-term operation. Here we describe the finding novel free shows remarkable high (single test: >400,000 cycling) together with power density at 120°C under non-humidified condition. This achieved by using...

The delivery of genetic material into plants has been historically challenging due to the cell wall barrier, which blocks passage many biomolecules. Carbon nanotube-based emerged as a promising solution this problem and shown effectively deliver DNA RNA intact plants. Mitochondria are important targets their influence on agronomic traits, but organelle limited low efficiencies, restricting potential in engineering. This work describes use carbon nanotube-polymer hybrid modified with...

Amine-active N-hydroxysuccinimide-terminated alkyl thiol templates are generated using parallel dip-pen nanolithography (DPN) and used to covalently couple protein A/G. The arrays (see figure) capture antibodies through affinity binding, while preserving their biological recognition properties. versatility of the DPN method for making many similar structures in a relatively high-throughput manner (14 000 dots 10 min) is described. Supporting information this article available on WWW under...

Composite polymer gels composed of poly(N-isopropylacrylamide) and CNTs exhibit a repeatable volume phase transition between shrinkage swelling upon ON/OFF NIR laser-light irradiation. The change is for more than 1200 cycles, indicating that the gel has an extremely high durability. local transient heat via irradiation raised temperature at spot area in through photothermal conversion effect CNTs, thus inducing this change.

Abstract In this review article, we describe i) a strategy for individual solubilization of single-walled carbon nanotubes (SWNTs) in water or organic solvents and ii) some fundamental properties applications the solubilized SWNTs.

Recent developments of non-covalent functionalization carbon nanotubes (CNTs) require a systematic understanding the interaction between molecule and CNTs (CNT-molecular interaction); however, it has been difficult to evaluate "net" molecules. We now use silica gel particles coated with pristine single-walled (SWNTs) in monolayer fashion as stationary phase HPLC column. The newly developed column (SWNT-column) worked powerful tool for ranking interactions SWNTs molecules high precision....

Abstract Polybenzimidazole (PBI) is shown to individually dissolve/disperse single‐walled carbon nanotubes (SWNTs) in N , ‐dimethylacetamide (DMAc), which demonstrated by vis‐near IR absorption and photoluminescence spectroscopy atomic force microscopy observations. By casting these dispersions, SWNTs/PBI composite films were successfully fabricated on substrates without any sign of macroscopic aggregation. The thermal stability mechanical properties the investigated using thermogravimetric...

Transparent and conductive single-walled carbon nanotube (SWNT) films are of great importance to a number applications such as optical electronic devices. Here, we describe simple approach for preparing free-standing highly transparent SWNT with 20-150 nm thickness by spray coating from surfactant-dispersed aqueous solutions SWNTs synthesized an improved floating-catalyst growth method. After the HNO(3) treatment, dipping supporting on glass substrates in water resulted quick nondestructive...

Synthesized single-walled carbon nanotubes (SWNTs) are mixtures of right- and left-handed helicity their separation is an essential topic in nanocarbon science. In this paper, we describe the semiconducting SWNTs from as-produced SWNTs. Our strategy for goal simple: designed copolymers composed polyfluorene chiral bulky moieties because polyfluorenes with long alkyl-chains known to dissolve only binaphthol a so-called BINAP family that possesses powerful enantiomer sorting capability. study,...

Abstract We present a new concept for homogeneous spinel nanocrystal-coating on high crystalline pristine-carbon nanotubes (CNTs) efficient and durable oxygen evolution reaction (OER) reduction (ORR). Oxidized CNTs have widely been used to functionalize with metal or oxides since the defect sites act as anchoring oxide binding. However, such defects tubes cause decrease in electrical conductivity stability, leading lower catalyst performance. In study, at first, pristine multi-walled carbon...

The development of n-type single-walled carbon nanotubes (SWCNTs) stable under an air atmosphere is a key issue to prepare efficient and thermoelectric conversion device using SWCNTs. Doping SWCNT sheets with 2-(2-methoxyphenyl)-1,3-dimethyl-2,3-dihydro-1H-benzo[d]imidazole (o-MeO–DMBI) offers air-stable sheets. However, clear mechanism the stabilization in has not been clarified yet. In this study, stability found largely depend on doping concentration. Adsorption isotherm experiments...

Multiple approaches will be needed to reduce the atmospheric CO2 levels, which have been linked undesirable effects of global climate change. The electroreduction driven by renewable energy is one approach emissions while producing chemical building blocks, but current electrocatalysts exhibit low activity and selectivity. Here, we report structural electrochemical characterization a promising catalyst for CO: Au nanoparticles supported on polymer-wrapped multiwall carbon nanotubes. This...

Iron(II) complexes of triazole derivatives having two C12 and C16 long alkyl chains, (C12trz)FeII (C16trz)FeII, serve as novel spin-crossover materials, which display a spin-state transition in response to phase transition. In contrast, complex with C8 chains ((C8trz)FeII) exhibits only poor response. EXAFS XRD analyses (C16trz)FeII indicate an interdigitating self-assembled structure polynuclear iron(II) species. According DSC, VT-IR, VT-XRD profiles, the is triggered by melting likely...

Development of non-platinum electrocatalysts with high performance, durability, and scalability for fuel cells batteries is a strong social demand next-generation eco-friendly energy society.