@article{,
title = {Tuning the intermediate reaction barriers by a CuPd catalyst to improve the selectivity of CO2 electroreduction to C2 products},
author = {L Zhu and Y Lin and K Liu and E Cort\'{e}s and H Li and J Hu and A Yamaguchi and X Liu and M Miyauchi and J Fu and M Liu},
url = {https://www.sciencedirect.com/science/article/pii/S1872206720637548},
doi = {https://doi.org/10.1016/S1872-2067(20)63754-8},
issn = {1872-2067},
year = {2021},
date = {2021-05-12},
journal = {Chinese Journal of Catalysis},
volume = {42},
number = {9},
pages = {1500-1508},
abstract = {Electrochemical CO2 reduction is a promising strategy for the utilization of CO2 and intermittent excess electricity. Cu is the only single metal catalyst that can electrochemically convert CO2 into multicarbon products. However, Cu exhibits an unfavorable activity and selectivity for the generation of C2 products because of the insufficient amount of CO* provided for the C-C coupling. Based on the strong CO2 adsorption and ultrafast reaction kinetics of CO* formation on Pd, an intimate CuPd(100) interface was designed to lower the intermediate reaction barriers and improve the efficiency of C2 product formation. Density functional theory (DFT) calculations showed that the CuPd(100) interface enhanced the CO2 adsorption and decreased the CO2* hydrogenation energy barrier, which was beneficial for the C-C coupling. The potential-determining step (PDS) barrier of CO2 to C2 products on the CuPd(100) interface was 0.61 eV, which was lower than that on Cu(100) (0.72 eV). Encouraged by the DFT calculation results, the CuPd(100) interface catalyst was prepared by a facile chemical solution method and characterized by transmission electron microscopy. CO2 temperature-programmed desorption and gas sensor experiments further confirmed the enhancement of the CO2 adsorption and CO2* hydrogenation ability of the CuPd(100) interface catalyst. Specifically, the obtained CuPd(100) interface catalyst exhibited a C2 Faradaic efficiency of 50.3% ± 1.2% at −1.4 VRHE in 0.1 M KHCO3, which was 2.1 times higher than that of the Cu catalyst (23.6% ± 1.5%). This study provides the basis for the rational design of Cu-based electrocatalysts for the generation of multicarbon products by fine-tuning the intermediate reaction barriers.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{,
title = {High-Performance Vertical Organic Transistors of Sub-5 nm Channel Length},
author = {J Lenz and A M Seiler and F R Geisenhof and F Winterer and K Watanabe and T Taniguchi and R T Weitz},
url = {https://doi.org/10.1021/acs.nanolett.1c01144},
doi = {10.1021/acs.nanolett.1c01144},
issn = {1530-6984},
year = {2021},
date = {2021-05-06},
journal = {Nano Letters},
abstract = {Miniaturization of electronic circuits increases their overall performance. So far, electronics based on organic semiconductors has not played an important role in the miniaturization race. Here, we show the fabrication of liquid electrolyte gated vertical organic field effect transistors with channel lengths down to 2.4 nm. These ultrashort channel lengths are enabled by using insulating hexagonal boron nitride with atomically precise thickness and flatness as a spacer separating the vertically aligned source and drain electrodes. The transistors reveal promising electrical characteristics with output current densities of up to 2.95 MA cm\textendash2 at −0.4 V bias, on\textendashoff ratios of up to 106, a steep subthreshold swing of down to 65 mV dec\textendash1 and a transconductance of up to 714 S m\textendash1. Realizing channel lengths in the sub-5 nm regime and operation voltages down to 100 μV proves the potential of organic semiconductors for future highly integrated or low power electronics.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{,
title = {Characterization and Quantification of Depletion and Accumulation Layers in Solid-State Li+-Conducting Electrolytes Using In Situ Spectroscopic Ellipsometry},
author = {L Katzenmeier and L Carstensen and S J Schaper and P M\"{u}ller-Buschbaum and A S Bandarenka},
url = {http://europepmc.org/abstract/MED/33955614
https://doi.org/10.1002/adma.202100585},
doi = {10.1002/adma.202100585},
issn = {0935-9648},
year = {2021},
date = {2021-05-06},
journal = {Advanced Materials},
pages = {e2100585},
abstract = {The future of mobility depends on the development of next-generation battery technologies, such as all-solid-state batteries. As the ionic conductivity of solid Li⁺ -conductors can, in some cases, approach that of liquid electrolytes, a significant remaining barrier faced by solid-state electrolytes (SSEs) is the interface formed at the anode and cathode materials, with chemical instability and physical resistances arising. The physical properties of space charge layers (SCLs), a widely discussed phenomenon in SSEs, are still unclear. In this work, spectroscopic ellipsometry is used to characterize the accumulation and depletion layers. An optical model is developed to quantify their thicknesses and corresponding concentration changes. It is shown that the Li⁺ -depleted layer (≈190 nm at 1 V) is thinner than the accumulation layer (≈320 nm at 1 V) in a glassy lithium-ion-conducting glass ceramic electrolyte (a trademark of Ohara Corporation). The in situ approach combining electrochemistry and optics resolves the ambiguities around SCL formation. It opens up a wide field of optical measurements on SSEs, allowing various experimental studies in the future.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}