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September's ultrafine dust density falls to lowest level on record

September s ultrafine dust density falls to lowest level on record ....

Soult Ukpyolsi , South Korea , Kangwon Do , National Institute Of Environmental Research , Korea Times , National Institute , Environmental Research , Gangwon Province , Korean Peninsula , East Sea ,

"Melamine-assisted synthesis of ultrafine Mo sub 2 /sub C/Mo sub 2 /sub" by Jing Chen, Anqiang Pan et al.

Abstract
Noble metal-free electrocatalysts with high activity are highly desirable for the large-scale application of hydrogen evolution reaction (HER). Mo C-based nanomaterials have been proved as a promising alternative to noble metal-based electrocatalysts owing to the Pt-resembled d-band density and optimal intermediates-adsorption properties. However, the aggregation and excessive growth of crystals often occur during their high-temperature synthesis procedure, leading to low catalytic utilization. In this study, the ultrafine Mo C/Mo N heterostructure with large surface and interface confined in the N-doped carbon nanofibers (N-CNFs) was obtained by a melamine-assisted method. The synergistic effect of Mo C/Mo N heterostructure and plenty active sites exposed on the surface of ultrafine nanocrystals improves the electrocatalytic activity. Meanwhile, the N-CNFs ensure fast charge transfer and high structural stability during reactions. Moreover, the in-situ synthesis meth ....

Moc Mo , Hydrogen Evolution Reaction , Soc 2 ,