Publications

In the title compound, C(20)H(18)BrNO(4)S(2), the mean planes formed by the toluene substituents are inclined at a dihedral angle of 45.34 (8)°. The bromo-benzene group is disordered over two positions with an occupancy ratio of 0.74:0.26, resulting in two conformations of the ring; the two rings are oriented at a dihedral angle of 6.6 (6)° with each other. In the crystal structure, weak C-H⋯O inter-actions connect the mol-ecules in a zigzag manner along the a axis.

The electrodeposition of polyaniline on stainless steel electrode was carried out in aqueous media at two different concentrations of sulphuric acid under potentiodynamic conditions. It was found that the nature of the voltammograms in 0.5M and 1M of H2SO4 are simillar. The first voltammetric wave (A1 & C1) of the cyclic voltammograms corresponding to transition from leucoemaraldine (LE) state to emeraldine (EM) state. The deposited films were characterized electrochemically and microscopically. The deposition of polyaniline appears to occur over the passive metal oxide film and the electron transfer between the polymer and the metal occur. Polyaniline films on stainless steel appear to be promising for metal anodic protection in corrosive aqueous media. The electrochemical parameters of the electrodeposited polyaniline were determined using cyclic voltammetry, convolution- deconvolution transforms and derived chronoamperograms.

In this Letter, we demonstrate the direct growth of FeP nanoparticles film on carbon cloth (FeP/CC) through low-temperature phosphidation of its Fe3O4/CC precursor. Remarkably, when used as an integrated 3D hydrogen evolution cathode, this FeP/CC electrode exhibits ultrahigh catalytic activity comparable to commercial Pt/C and good stability in acidic media. This electrode also performs well in neutral solutions. This work offers us the most cost-effective and active 3D cathode toward electrochemical water splitting for large-scale hydrogen fuel production.

Abstract Carbon nanotubes decorated with CoP nanocrystals are prepared by calcination of a mixture of Co 3 O 4 /carbon nanotubes (hydrothermally obtained from carbon nanotubes, Co(OAc) 2 , and NH 4 OH dissolved in EtOH/H 2 O in an autoclave at 150 °C for 3 h) and NaH 2 PO 2 at 300 °C for 2 h.

Abstract It is highly attractive but challenging to develop earth‐abundant electrocatalysts for energy‐saving electrolytic hydrogen generation. Herein, we report that Ni 2 P nanoarrays grown in situ on nickel foam (Ni 2 P/NF) behave as a durable high‐performance non‐noble‐metal electrocatalyst for hydrazine oxidation reaction (HzOR) in alkaline media. The replacement of the sluggish anodic oxygen evolution reaction with such the more thermodynamically favorable HzOR enables energy‐saving electrochemical hydrogen production with the use of Ni 2 P/NF as a bifunctional catalyst for anodic HzOR and cathodic hydrogen evolution reaction. When operated at room temperature, this two‐electrode electrolytic system drives 500 mA cm −2 at a cell voltage as low as 1.0 V with strong long‐term electrochemical durability and 100 % Faradaic efficiency for hydrogen evolution in 1.0 m KOH aqueous solution with 0.5 m hydrazine.

Abstract The sluggish kinetics of the oxygen evolution reaction (OER) impedes the whole water splitting efficiency and it is thus highly desirable to develop cost‐effective OER electrocatalysts. In this Communication, we report the one‐step preparation of cobalt‐nanoparticle‐embedded carbon as a superior OER electrocatalyst with a low overpotential of 232 mV to drive a current density of 10 mA cm −2 in 1.0 M KOH. Notably, this catalyst also exhibits excellent long‐term electrochemical stability. The catalytic mechanism is also investigated by density functional theory calculations.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.