Transplanting Gold Active Sites into Non-Precious-Metal Nanoclusters for Efficient CO-to-CO Electroreduction.

Electrocatalytic CO reduction reaction (CORR) is greatly facilitated by Au surfaces. However, large fractions of underlying Au atoms are generally unused during the catalytic reaction, which limits mass activity. Herein, we report a strategy for preparing efficient electrocatalysts with high mass activities by the atomic-level transplantation of Au active sites into a Ni nanocluster (NC).

Numerical investigation of the energy limit in a picosecond fiber optic parametric oscillator.

Numerical simulation of a fiber optic parametric oscillator to produce picosecond narrowband pulses for coherent anti-Stokes Raman spectroscopy has been performed by an open source Python-based library using an extremely wide range of parameters, such as the pump pulse duration, parametric frequency shift, spectral bandwidth of the pump, and the parametric pulses. It required an extremely large calculation window, both in time and spectral domains. We managed to speed up the simulation 50 times using a graphic processor unit that allowed us to define the areas of stability for different lengths of standard passive (5-100 m) and photonic crystal (23-100 cm) fibers used in the external linear oscillator cavity.

Controlled syngas production by electrocatalytic CO reduction on formulated Au(SR) and PtAu(SR) nanoclusters.

Syngas, a gaseous mixture of CO and H, is a critical industrial feedstock for producing bulk chemicals and synthetic fuels, and its production via direct CO electroreduction in aqueous media constitutes an important step toward carbon-negative technologies. Herein, we report controlled syngas production with various H/CO ratios via the electrochemical CO reduction reaction (CORR) on specifically formulated Au and PtAu nanoclusters (NCs) with core-atom-controlled selectivities. While CO was predominantly produced from the CORR on the Au NCs, H production was favored on the PtAu NCs.

Neurulation in the posterior region of zebrafish, Danio rerio embryos.

The neural tube of amniotes is formed through different mechanisms that take place in the anterior and posterior regions and involve neural plate folding or mesenchymal condensation followed by its cavitation. Meanwhile, in teleost trunk region, the neural plate forms the neural keel, while the lumen develops later. However, the data on neurulation and other morphogenetic processes in the posterior body region in Teleostei remain fragmentary.