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In this study, Fe1Pt3 nanoparticles are dispersed on MoS2 nanosheets to integrate the fascinating features of noble metal with highly exposed nanosheets. The MoS2 nanosheets supply good support for the uniform dispersion and easily accessibility of Fe1Pt3 nanoalloys, and ultrafine Fe1Pt3 nanoparticles provide a large number of active sites and enhanced catalysis/charge kinetics. The Fe1Pt3-MoS2 catalyst exhibits good hydrogen evolution performances in acidic media with low overpotential of 59 mV at current density of 10 mA cm−2 and robust catalysis kinetics (Tafel slope of 38 mV dec−1), making it high-efficiency HER catalyst with low Pt loading. [ABSTRACT FROM AUTHOR]

Catalytic dehydrogenative coupling of thiols with amines to produce sulfenamides and disulfides is an important reaction in the industry. Classical synthesis of sulfenamides involves the reaction between amine nucleophiles and sulfonyl chlorides, which are not widely available, toxic and unstable, and the reaction requires a combination of oxidizing and chlorinating reagents. Here we decribe an environmentally benign protocol for the efficient electrochemical dehydrogenative coupling of thiols with amines or thiols to form compounds possessing S–N or S–S bonds. We used potassium iodide as electrocatalyst in methanol for a greener reaction. The reaction operates under ambient conditions in the absence of oxidants, acids/bases or toxic/explosive electrolytes. Results show that most produced sulfenamides and disulfides are generated in yields up to 99%. [ABSTRACT FROM AUTHOR]

An electrochemical sensor for paracetamol is described that consists of a glassy carbon electrode (GCE) that was modified with the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) doped with MnO2 nanoflowers. The hydrothermally synthesized MnO2 nanoflowers possess a large surface area and can be doped into PEDOT through electrochemical deposition to form a conducting polymer nanocomposite. The nanoflowers are shown to be uniformly distributed within the nanocomposite as revealed by elemental mapping analysis. The nanocomposite displays excellent catalytic activity toward the electrochemical oxidation of paracetamol. The modified GCE, best operated at a working potential of around 0.37 V (vs. SCE) has a linear response in 0.06 to 435 μM paracetamol concentration range and a very low limit of detection (31 nM at a signal-to-noise ratio of 3). The sensor exhibits excellent reproducibility and stability, and satisfying accuracy for paracetamol detection in pharmaceutical samples. [ABSTRACT FROM AUTHOR]