Yarn supercapacitors are promising power sources for flexible electronic applications that require conventional fabric-like durability and wearer comfort. Carbon nanotube (CNT) yarn is an attractive choice for constructing yarn supercapacitors used in wearable textiles because of its high strength and flexibility. However, low capacitance and energy density limits the use of pure CNT yarn in wearable high-energy density devices. Here, transitional metal oxide pseudocapacitive materials NiO and Co3 O4 are deposited on as-spun CNT yarn surface using a simple electrodeposition process. The Co3 O4 deposited on the CNT yarn surface forms a uniform hybridized CNT@Co3 O4 layer. The two-ply supercapacitors formed from the CNT@Co3 O4 composite yarns display excellent electrochemical properties with very high capacitance of 52.6 mF cm(-2) and energy density of 1.10 μWh cm(-2) . The high performance two-ply CNT@Co3 O4 yarn supercapacitors are mechanically and electrochemically robust to meet the high performance requirements of power sources for wearable electronics.

The design and fabrication of efficient and inexpensive electrodes for oxygen evolution reaction (OER) is essential for energy-conversion technologies. Herein, high OER activity is achieved using hollow mesoporous NiCo2O4 nanocages synthesized via a Cu2O-templated strategy combined with coordination reaction. The NiCo2O4 nanostructures with a hollow cavity, large roughness and high porosity show only a small overpotential of ∼0.34 V at the current density of 10 mA cm(-2) and a Tafel slope of 75 mV per decade, which is comparable with the performance of the best reported transition metal oxide based OER catalysts in the literature. Meanwhile, the positive impacts of the nanocage structure and the Ni incorporation on the electrocatalytic performance are also demonstrated by comparing the OER activities of NiCo2O4 nanocages with Co3O4 nanocages, NiCo2O4 nanoparticles and 20 wt% Pt/C. Moreover, the NiCo2O4 nanocages also manifest superior stability to other materials. All these merits indicate that the hollow mesoporous NiCo2O4 nanocages are promising electrocatalysts for water oxidation.

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The heterostructured Au nanoparticles decorated Fe 3 O 4 @TiO 2 composite magnetic microspheres (MSs) were synthesized by grafting Au nanoparticles onto 3-Aminopropyltrimethoxysilane (APTMS) modified Fe 3 O 4 @TiO 2 MSs. Significantly, by varying the reaction conditions, the as-synthesized Fe 3 O 4 @TiO 2 @Au MSs showed high performance in the catalytic reduction of 4-nitrophenol (4-NP) to 4-10 aminophenol (4-AP) in the presence of NaBH 4 under visible light. In addition, the as-prepared Fe 3 O 4 @TiO 2 @Au MSs can clean themselves by photocatalytic degradation of organic molecules, and can be reused for several cycles with convenient magnetic separability. This approach provided a platform based on the synergy of varying components under suitable conditions to optimize the catalytic ability. 65 80

A simple and efficient method for the synthesis of 2,4,5-trisubstituted imidazoles has been developed by using a continuous flow microreactor system under pressure; aryl-, alkyl-, and heteroarylsubstituted imidazoles were obtained in high yields within 2 min under superheating conditions.