02563nas a2200241   4500008004100000022001400041245015400055210006900209260000900278300001600287490000700303520167200310653002201982653001602004653002202020653001402042653002302056100001802079700002902097700003502126700003002161856013002191       2025                        eng d  a2168-048500aSelective anodic transformation of glycerol with ZnCo 2 O 4 2D nanoplates: sustainable coproduction of carbon-negative green hydrogen and formic acid0 aSelective anodic transformation of glycerol with ZnCo 2 O 4 2D n  cJUL   a11458-114730 v133 a<p>
	In the pursuit of sustainable green hydrogen production, the electrooxidation of abundantly available carbon-containing molecules at a significantly low voltage presents a promising pathway, helping to reduce the cost of hydrogen generation while simultaneously yielding value-added chemicals/fuels. In the current study, we report the template-free green synthesis of ZnCo2O4 directly on Ni-foam (NF), demonstrating anodic stability and bifunctional electrocatalytic activity toward alkaline (1 M KOH) glycerol oxidation over an extended duration of 230 h at 50 mA cm- 2. The catalyst's high electrochemical surface area contributes to its remarkable performance, enabling sustained high current density. Compared with monometallic (ZnO or Co3O4) oxides, ZnCo2O4 oxide reveals superior catalytic performance. The two-electrode electrolyzer setup (ZnCo2O4 oxide/NF || ZnCo2O4 oxide/NF) operates at a significantly low cell potential of 1.9 V to achieve 100 mA cm- 2 in 0.2 M glycerol, which is 180 mV lower than that of conventional 1 M KOH solution. The three-electrode setup achieved 1 A/cm2 current density at 1.907 V vs RHE. Both anodic and cathodic processes exhibit high Faradaic efficiency, achieving 98% efficiency for H2 and 90% selectivity toward formate generation, along with significant methanol production. This demonstrates efficient C-C bond cleavage capability with glycerol to predominantly C1-products. The electrocatalytic formate production from alkaline glycerol using ZnCo2O4 offers an energy-efficient pathway, facilitating carbon-negative green hydrogen generation, thus contributing to a cleaner and sustainable energy landscape.</p>
10aenergy conversion10aFormic acid10aglyceroloxidation10agreen H-210awater electrolysis1 aSaha, Arindam1 aMurugiah, Vasantharadevi1 aKollenteakathootu, Jayalakshmi1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/selective-anodic-transformation-glycerol-znco-2-o-4-2d-nanoplates-sustainable-coproduction02229nas a2200241   4500008004100000022001400041245015000055210006900205260000800274300001600282490000700298520136500305100002201670700002401692700001901716700002001735700001901755700001801774700001901792700003001811700001801841856012801859       2025                        eng d  a2041-652000aSteric hindrance modulated efficient thermally activated delayed fluorescence with non-linear optical, ferroelectric and piezoelectric properties0 aSteric hindrance modulated efficient thermally activated delayed  cJUL  a11989-119980 v163 a<p>
	Multi-carbazole-based benzonitrile systems are efficient thermally activated delayed fluorescence (TADF) materials for organic light-emitting diodes (OLEDs). However, they suffer from low PLQY due to the large dihedral angle arising from steric crowding. Addressing this challenge, we demonstrate a potent strategy to engineer steric crowding in this work. To achieve our goal, we have designed three luminogens, namely, CzPHCN, tCzPHCN and Cz2CzPHCN based on phenanthrene-9,10-dicarbonitrile (PHCN), as an acceptor core to minimize the steric hindrance between the donor groups. Among the three luminogens, tCzPHCN exhibits a maximum PLQY of 86% and the highest RISC rate of 3.5 x 105 s-1, the underlying cause being the least dihedral angle of 45.72 degrees and suppressed intermolecular interaction due to the presence of the bulky tert-butyl group. Interestingly, our QM/MM calculations and experimental evidence suggest that the RISC process of both CzPHCN and tCzPHCN takes place via a hot exciton channel. Unlocking a new realm of applications, the unique non-centrosymmetric space group (Cmc21) of CzPHCN offers excellent SHG with a chi(2) value of 0.21 pm V-1 at 1320 nm. In addition to this, the molecule depicts good ferroelectric (PS = 0.32 mu C cm-2), piezoelectric energy harvesting (VOC = 2.8 V) and two-photon absorption properties.</p>
1 aDutta, Madhusudan1 aChatterjee, Abhijit1 aDeka, Nilotpal1 aTanwar, Riteeka1 aMishra, Vishnu1 aSaha, Arindam1 aMandal, Pankaj1 aBoomishankar, Ramamoorthy1 aHazra, Partha  uhttps://library.ncl.res.in/content/steric-hindrance-modulated-efficient-thermally-activated-delayed-fluorescence-non-linear