Restricted ambient temperature and slow heat replenishment in the phase transition of water molecules severely limit the performance of the evaporation-induced hydrovoltaic generators. Here we demonstrate a heat conduction effect enhanced hydrovoltaic power generator by integrating a flexible ionic thermoelectric gelatin material with a porous dual-size Al2O3 hydrovoltaic generator. In the hybrid heat conduction effect enhanced hydrovoltaic power generator, the ionic thermoelectric gelatin material can effectively improve the heat conduction between hydrovoltaic generator and near environment, thus increasing the water evaporation rate to improve the output voltage. Synergistically, hydrovoltaic generator part with continuous water evaporation can induce a constant temperature difference for the thermoelectric generator. Moreover, the system can efficiently achieve solar-to-thermal conversion to raise the temperature difference, accompanied by a stable open circuit voltage of 6.4 V for the hydrovoltaic generator module, the highest value yet.
The practical synthesis of P-stereogenic tertiary
phosphines, which have wide applications in asymmetric catalysis,
materials, and pharmaceutical chemistry, represents a significant
challenge. A regio- and enantioselective hydrophosphination using
cheap and ubiquitous alkynes catalyzed by a nickel complex was designed,
in which the toxic and air-sensitive secondary phosphines were prepared in situ from bench-stable secondary phosphine oxides. This
methodology has been demonstrated with unprecedented substrate scope
and functional group compatibility to afford electronically and structurally
diversified P(III) compounds. The products could be easily converted
into various precursors of bidentate ligands and organocatalysts,
as well as a variety of transition-metal complexes containing both P- and metal-stereogenic centers.
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