2,859 publications from this institution
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.
Abstract Development of earth‐abundant bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is highly desirable but still remains a great challenge. In this Communication, we demonstrate that a Ni‐P alloy nanoparticle film electrodeposited on Ni foam (Ni‐P/NF) acts as an efficient bifunctional water‐splitting electrocatalyst with strong durability in alkaline media. This electrode needs overpotentials of 80 and 309 mV to drive 10 mA cm −2 for HER and OER, respectively, in 1.0 m KOH, and its two‐electrode water electrolyzer requires voltage of 1.67 V to reach 10 mA cm −2 .
The title compound, 5-[(3,5-dimethyl-1-phenyl-1H-pyrazol-4-yl)methylene]-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione, has been synthesized by condensation of 1,3-diethyl-2-thiobarbituric acid and 3,5-dimethyl-1-phenylpyrazole-4-carbaldehyde in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1H-NMR, 13C-NMR and EI-MS spectral analysis.
The asymmetric unit of the 5:3 title co-crystal of 2-amino-4-phenyl-5,6-dihydro-benzo[h]quinoline-3-carbonitrile and 3-amino-1-phenyl-9,10-dihydro-phenanthrene-2,4-dicarbonitrile, 0.625C(20)H(15)N(3).0.375C(22)H(15)N(3), has the atoms of the fused-ring system and those of the amino, cyano and phenyl substitutents overlapped. The fused-ring system is buckled owing to the ethyl-ene linkage in the central ring, the two flanking aromatic rings being twisted by 20.1 (1)°. This ethyl-ene portion is disordered over two positions in a 1:1 ratio. The phenyl ring is twisted by 69.5 (1)° relative to the amino- and cyano-bearing aromatic ring. In the crystal, two mol-ecules are linked by an N-H⋯N hydrogen bond, generating a a helical chain along [010].
In this paper, we report a facile one-pot route to prepare core-shell Ag2S@MSN mesoporous silica nanospheres with near-infrared (NIR) photoluminescent properties. The Ag2S@MSN nanospheres have uniform core-shell structures with single monoclinic α-Ag2S nanocrystal core (∼17 nm), ordered mesoporous silica shell (the thickness of ∼20 nm), very high surface area (∼909 m2 g−1), and uniform pore size (∼2.6 nm). The core-shell Ag2S@MSN nanospheres show NIR emission at around 1275 nm excited by a 648 nm laser diode, which can be observed in a wide range of concentration (0.2∼3.2 mg mL−1). The stability of the NIR photoluminescence for the core-shell Ag2S@MSN nanospheres is greatly improved compared to the bare Ag2S nanocrystals. The NIR emission intensity could be enhanced after the hydrothermal treatment with the increase of crystallinity of the silver sulfide cores. The thickness of mesoporous silica shell could be tuned by adjusting the amount of silica source. Furthermore, the core-shell Ag2S@MSN nanocomposites with several small Ag2S nanoparticles in one mesoporous silica shell could also be obtained, which may be a good candidate for bioimaging and biolabeling.
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.
In this Communication, we report the topotactic fabrication of self-supported nanoporous cobalt phosphide nanowire arrays on carbon cloth (CoP/CC) via low-temperature phosphidation of the corresponding Co(OH)F/CC precursor. The CoP/CC, as a robust integrated 3D hydrogen-evolving cathode, shows a low onset overpotential of 38 mV and a small Tafel slope of 51 mV dec(-1), and it maintains its catalytic activity for at least 80,00 s in acidic media. It needs overpotentials (η) of 67, 100, and 204 mV to attain current densities of 10, 20, and 100 mA cm(-2), respectively. Additionally, this electrode offers excellent catalytic performance and durability under neutral and basic conditions.
