Natural wood derived robust carbon sheets with perpendicular channels as gas diffusion layers in air-breathing proton exchange membrane fuel cells (PEMFCs)

Abstract Herein, a novel natural wood derived macroporous carbon sheet with three-dimension inter-connected perpendicular-channels was engineered as gas diffusion layers (w-GDLs) for air-breathing proton exchange membrane fuel cells (PEMFCs). Beneficial to the unique accessible perpendicular channels and the presence of a microporous layer, the current density reached 0.139 A/cm2 (at 0.6 V) and the maximum power density elevated up to 0.102 W/cm2 (at 0.43 V), which are comparable to the best results reported for the air-breathing PEMFCs with high Pt loadings. Furthermore, it exhibited excellent durability during preliminary constant discharge operation, demonstrating the feasibility of this w-GDL for practical applications

Anisotropie du choc et fuites de neutrons dans un reseau de reacteur

Available from CEN Saclay, Service de Documentation, 91191 - Gif-sur-Yvette Cedex (France) / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc

A NbO type microporous metal-organic framework constructed from a naphthalene derived ligand for CH4 and C2H2 storage at room temperature

A novel NbO type microporous metal-organic framework [Cu-2(C26H12O8)(H2O)(2)]center dot(DMF)(2)center dot(MeCN)(3)center dot(H2O)(4), (ZJU-7, ZJU = Zhejiang University; H4L - 5,5'-(naphthalene-1,4-diyl)diisophthalic acid; DMF = N, N-dimethylformamide; MeCN = acetonitrile) has been synthesized and structurally characterized. With open metal sites, suitable pore spaces and moderately high permanent porosity, the activated ZJU-7a exhibits moderately high CH4 storage of 160 cm(3)(STP) per cm(3) at 35 bar and 298 K. Meanwhile, ZJU-7a also displays moderate C2H2 gravimetric storage of 180 cm(3) g(-1) at 1 atm and 298 K

A new metal–organic framework with potential for adsorptive separation of methane from carbon dioxide, acetylene, ethylene and ethane established by simulated breakthrough experiments

A new three-dimensional microporous metal–organic framework, Cu₂ (MFDI) (ZJU-60, H₄MFDI = 5,5′-(9,9-dimethyl-9H-fluorene-2,7-diyl)diisophthalic acid), was solvothermally synthesized. ZJU-60 features a three-dimensional structure with a rare sty-a type topology and has two different types of pore apertures. With open metal sites and suitable pore spaces, ZJU-60 can readily separate methane in nearly pure form from CO₂ and C₂-hydrocarbon quaternary gas mixtures at room temperature with high separation capacity and moderate selectivity. The separation feasibility has been further established by simulated breakthrough and pulse chromatographic experiments

A cationic microporous metal–organic framework for highly selective separation of small hydrocarbons at room temperature

A new three-dimensional cationic metal–organic framework Zn8O(EDDA)4(ad)4•(HEDDA)2•6DMF•27H2O (ZJU-48; H2EDDA = (E)-4,4′-(ethene-1,2-diyl)dibenzoic acid; ad = adenine) was solvothermally synthesized and structurally characterized. ZJU-48 features a three-dimensional structure with a cationic skeleton and has one-dimensional pores along the c axis of about 9.1 × 9.1 Å2. The activated ZJU-48a exhibits a BET surface area of 1450 m2 g−1. The structural features of the charged skeleton of ZJU-48a have enabled its stronger charge-induced interaction with C2 hydrocarbons than with C1 methane, resulting in highly selective gas sorption of C2 hydrocarbons over CH4 with the adsorption selectivity over 6 at 298 K. The separation feasibility has been further established by the simulated breakthrough and pulse chromatographic experiments, thus methane can be readily separated from their quaternary mixtures at room temperature

A Highly Sensitive Mixed Lanthanide Metal–Organic Framework Self-Calibrated Luminescent Thermometer

A new mixed lanthanide metal–organic framework thermometer Tb_0.9Eu_0.1PIA with the significantly high sensitivity of 3.53% per K has been realized by making use of an organic ligand, 5-(pyridin-4-yl)­isophthalate, with higher triplet state energy