02344nas a2200193   4500008004100000022001400041245013000055210006900185260000800254300001400262490000700276520164000283100001901923700002401942700001901966700001801985700002202003856012502025       2022                        eng d  a1463-926200a`Self-activating' Bi3TaO7-Bi4TaO8Br photocatalyst and its use in the sustainable production of pro-fluorophoric rhodamine-1100 aSelfactivating Bi3TaO7Bi4TaO8Br photocatalyst and its use in the  cJUL  a5514-55230 v243 a<p>
	We counter two common notions that (i) photocatalysts are likely to degrade during use with barely any strategy to counter it and (ii) rhodamine-B (RhB) photo-degradation lacks any useful or commercial prospects even after 53 years of its discovery by developing a photocatalyst that continues to improve its activity for similar to 300 h due to a leaching induced `self-activation' process. Rhodamine-110 (Rh110) is a widely used pro-fluorophore in biological studies. However, its commercial production is highly challenging due to the formation of various side-products originating from the presence of the two labile amino side-groups that induce the pro-fluorophore activity, leading to purification difficulties, low yield, and unusually high costs. Herein, we demonstrate a facile strategy to produce pure Rh110 using extremely inexpensive RhB and Bi3TaO7-Bi4TaO8Br heterostructures as a catalyst in sunlight. The catalyst is not just stable over 30 catalytic cycles but also gets activated continuously in successive cycles to produce a reaction yield as high as 88%. The role of the heterostructure, the origin of surface activation, and the RhB -&gt; Rh110 transformation mechanism have been established. Based on 150 days of sunlight experiments, large-scale production prospects (similar to 4000 times scale-up) and isolation of Rh110 have also been realized, paving a novel way for its production by anyone, inexpensive biological essaying, and device fabrication. Continuously improving catalysts are unknown and compensatory leaching of metal atoms from the catalyst surface may pave the way to realize them.</p>
1 aBanoo, Maqsuma1 aChatterjee, Kaustav1 aMondal, Sanjit1 aVinod, C., P.1 aGautam, Ujjal, K.  uhttp://library.ncl.res.in/content/self-activating-bi3tao7-bi4tao8br-photocatalyst-and-its-use-sustainable-production-pro02634nas a2200253   4500008004100000022001400041245017600055210006900231260000800300300001400308490000800322520171200330653002702042653002602069653002202095653002002117653002802137100001602165700002102181700002102202700001802223700002202241856011702263       2022                        eng d  a0008-622300aSingle-step insertion of M-Nx moieties in commercial carbon for sustainable bifunctional electrocatalysis: mapping insertion capacity, mass loss, and carbon reconstruction0 aSinglestep insertion of MNx moieties in commercial carbon for su  cAUG  a1001-10110 v1963 a<p>
	Atomically dispersed earth-abundant metals in N-doped carbon (M-N-Cs) have emerged as a new class of electroactive materials that can match not only the performance of the precious metals but can catalyze both the cathodic and the anodic reactions due to their bifunctional behaviour. This inspires the development of simpler strategies for scale-up production since the existing ones rely on precursors whose commercial viability is not yet ascertained. Herein, we demonstrate the insertion prospects of M-Nx (M = Fe, Co, Ni) moieties, the electrocatalytic centers in the M-N-Cs, into commercial carbon to establish that a single-step heating of the inexpensive precursors is sufficient to generate bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with efficiencies that bypass the majority of the known catalysts. Further importantly, we quantify both the ORR and OER trends and the metal insertion limits for each metal while maintaining an atomic dispersion, without the formation of surface migration-induced clustering, because such clustering is inevitable in the existing processes to necessitate an extra acid-leaching step to remove them. We further quantify and explain for each metal a negative mass balance originating from anomalous mass loss of both metal and carbon content, and a massive reconstruction of the carbon backbone catalyzed by the very metal, an event documented for the first time though it ought to be associated with other M-N-C syntheses too. The study establishes an incredibly simple and inexpensive strategy for the realization of M-N-Cs and outlines the parameters to be considered during mass-production.</p>
10aBifunctional catalysis10aCarbon reconstruction10aCommercial carbon10aMetal insertion10aOxygen electrocatalysis1 aGarg, Reeya1 aSahoo, Lipipuspa1 aKaur, Komalpreet1 aVinod, C., P.1 aGautam, Ujjal, K.  uhttp://library.ncl.res.in/content/single-step-insertion-m-nx-moieties-commercial-carbon-sustainable-bifunctional