Über e-conversion

@article{nokey,

title = {Light-driven olefin epoxidation via poly(Triazine Imide): A route towards sustainable epoxide production},

author = {G A Diab and G P De Sanctis and R M Ferreira and B G Jos\'{e} and K K\"{u}ster and J Sinisi and I R S Menezes and K Krambrock and I L Moudrakovski and V Duppel and B Kumru and I F Teixeira},

url = {\<Go to ISI\>://WOS:001756967700001},

doi = {10.1016/j.apcatb.2026.126839},

issn = {0926-3373},

year  = {2026},

date = {2026-10-05},

journal = {Applied Catalysis B-Environment and Energy},

volume = {394},

abstract = {The selective and sustainable synthesis of epoxides remains a critical challenge in chemical industry, as conventional oxidation routes often rely on transition metals, hazardous oxidants, and energy-intensive conditions, resulting in poor atom economy and limited sustainability. Herein, we report a transition-metal-free photo-catalyst system capable of promoting olefin epoxidation under mild conditions. Poly(triazine imide) (PTI), a highly crystalline carbon nitride, achieves near-quantitative styrene conversion with good selectivity toward styrene oxide under visible-light irradiation, using molecular oxygen (O2) as the sole oxidant and without the need for stoichiometric oxidants, chemical additives and harsh conditions typical of traditional protocols. A comprehensive structural and optoelectronical characterization was performed to correlate catalytic performance with the intrinsic properties of the material. Furthermore, mechanistic investigations were conducted to identify the key reactive species involved in the reaction. In situ EPR spin-trapping experiments reveal the cooperative involvement of photogenerated charge carriers and radical superoxide (O2 center dot-), driving the selective epoxidation process and singlet oxygen as the responsible for the byproducts. Overall, these findings highlight PTI as an efficient metal-free photocatalyst for O2-driven olefin epoxidation and demonstrate the potential of crystalline poly(triazine imide) materials as promising platforms for sustainable oxidation processes.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Electrochemical Evaluation of Constant Voltage Activation Strategies for PEM Fuel Cells: Advantages of Low-Voltage Break-In},

author = {P Hafner and E Avellone and F Haimerl and A S Bandarenka},

url = {\<Go to ISI\>://WOS:001762160500001},

doi = {10.1155/er/3236344},

issn = {0363-907X},

year  = {2026},

date = {2026-05-12},

journal = {International Journal of Energy Research},

volume = {2026},

number = {1},

abstract = {Proton exchange membrane (PEM) fuel cells are a promising alternative to combustion engines due to their high efficiency and low greenhouse gas emissions. However, the mass production of fuel cells is costly. One reason for the high production costs is the time and hydrogen-consuming break-in (activation). Developing a fast and gentle break-in procedure requires understanding the physical and electrochemical mechanisms triggered by different break-in methods. This study represents the first step in this direction, revealing the physical and electrochemical processes triggered by three different voltage levels: 0.2, 0.6, and 0.9 V. Polarization curves and electrochemical impedance spectroscopy (EIS) measurements were employed to elucidate the physical and electrochemical processes associated with the break-in at various voltage levels. The most promising results were obtained at 0.2 V. The detected performance increase was 9.0% +/- 1.8% at 1 A cm-2 current density compared to a performance increase of 6.2% +/- 1.2% at 0.6 V. In addition, the constant voltage break-in at 0.2 V was observed to achieve comparable performance improvements to a standard voltage cycling break-in. Membrane hydration and washing out impurities are the most relevant processes leading to the highest performance improvement at the low voltage level. While relative humidity (RH) impacts the results, no impact has been observed by intermediate characterization steps. Understanding the advantages of a low voltage level helps to develop an optimal break-in, which saves time and hydrogen, and paves the way for accelerated industrialization of PEM fuel cells.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Modulation of Single-Molecule Emission at Hexagonal Boron Nitride Surfaces},

author = {D Orekhova and R Wang and Z Yu and J Hartmann and T Schroder and N Kolbl and K Watanabe and T Taniguchi and P Tinnefeld and S Caneva},

url = {\<Go to ISI\>://WOS:001762953400001},

doi = {10.1021/acs.nanolett.5c05814},

issn = {1530-6984},

year  = {2026},

date = {2026-05-11},

journal = {Nano Letters},

abstract = {Hexagonal boron nitride (hBN) is gaining increasing attention in the field of biomolecule characterization due to its compatibility with single-molecule fluorescence imaging and real-time tracking. Embedding fluorescent molecules within hBN layers offers potential for molecular-resolution sensing devices, since these probes are highly sensitive to their surroundings. Yet, the effect of hBN surfaces on the fluorophore properties remains largely unexplored. Here, we monitor the photophysical properties of ATTO647N-ssDNA on hBN surfaces and elucidate the effects of the environment and substrate. We demonstrate that the presence of hBN increases the photobleaching time and changes intermittency dynamics. By combining van der Waals stacking and FDTD simulations, we subsequently engineer hBN optical cavities to modulate the emission from individual molecules, showing that the brightness can be tuned by a factor of 4. Our findings shed light on light-matter interactions in hybrid nanostructures, which can enable single-molecule imaging and biosensing at high spatial and temporal resolution.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}