02126nas a2200169   4500008004100000022001400041245015200055210006900207260000900276300001600285490000700301520146600308100001801774700001901792700001901811856012601830       2023                        eng d  a0743-746300aFerroelectric polarization and iron substitution synergistically boost electrocatalytic oxygen evolution reaction in bismuth oxychloride nanosheets0 aFerroelectric polarization and iron substitution synergistically  cAUG   a11414-114250 v393 a<p>
	Ferroelectric materials have gained significant interestin variouskinds of water splitting, but the study of ferroelectric materialsfor electrocatalytic water splitting is in its infancy. Ferroelectricmaterials have spontaneous polarization below their Curie temperaturedue to dipolar alignment, which results in surface charges. In 2Dferroelectric materials, spontaneous polarization depends on thickness.Herein, we report that thickness-dependent ferroelectric polarizationin 2D nanosheets can also accelerate the oxygen evolution reaction(OER) along with the tailored active surface area of exposed crystallinefacets, which improves the electrocatalytic activity relatively. Iron-substitutedBiOCl nanosheets of varying thickness are fabricated by varying thepH using a facile coprecipitation method. The substituted iron enhancespolarization and electrochemical active sites on the surface. Thefindings in this study show that the exposed (001) facet and higherthickness of the nanosheets have high ferroelectric polarization and,in turn, superior electrocatalytic activity and remarkable stability,requiring low overpotentials (348 mV and 270 mV at 100 mA/cm(2) and 10 mA/cm(2)) in alkaline (1.0 M KOH) electrolyte. Asthe thickness of the nanosheets is decreased from 140 to 34 nm, theelectrocatalytic performance of iron-substituted BiOCl nanosheetsstarts to reduce due to the lower Coulomb-Coulomb interactionand the increasing depolarization.</p>
1 aSingh, Dinesh1 aJoshi, Bhavana1 aPoddar, Pankaj  uhttp://library.ncl.res.in/content/ferroelectric-polarization-and-iron-substitution-synergistically-boost-electrocatalytic01503nas a2200157   4500008004100000022001400041245016300055210006900218260000800287300001600295490000700311520086500318100001801183700001901201856012501220       2023                        eng d  a0743-746300aScalable synthesis of dodecanethiol-capped bismuth nanoparticles by a solvent-free solid-state grinding method for reduction of 4-nitrophenol to 4-aminophenol0 aScalable synthesis of dodecanethiolcapped bismuth nanoparticles   cAug  a11888-118970 v393 a<p>
	Thiol-capped metal nanoparticles have two constituents:an inorganicmetal and an organic molecule as a shell. Both characters are inbuiltin the structure of the metal thiolate. Herein, we have investigatedbismuth dodecanethiolate as a precursor for the synthesis of dodecanethiol-cappedbismuth nanoparticles (Bi NPs) by a solid-state grinding method. Byusing sodium borohydride and bismuth dodecanethiolate, crystallinebismuth nanoparticles are synthesized in a solvent-free environmentat room temperature (24 &amp; PLUSMN; 4 &amp; DEG;C). Bi NPs are tested for catalyticactivity by reducing 4-nitrophenol (4-NP) to 4-aminophenol (4-AP)with an excess of NaBH4. Dodecanethiol-capped bismuth nanoparticlesexhibit an efficient reduction of 4-NP to 4-AP within 12 min. Additionally,these nanoparticles remain catalytically active for up to three cycles.</p>
1 aSingh, Dinesh1 aPoddar, Pankaj  uhttp://library.ncl.res.in/content/scalable-synthesis-dodecanethiol-capped-bismuth-nanoparticles-solvent-free-solid-state