Coordination-regulated copper single-atom active sites for electrochemical reduction of nitrate to ammonia.

The electrochemical conversion of nitrate to ammonia is necessary to restore the globally perturbed nitrogen cycle. Herein, the regulated coordination of active Cu single atoms to selectively modulate the energy barriers of proton-electron transfer steps was investigated and offered valuable insights for improving the selectivity and kinetics of the NORR.

Solar-Driven Harvesting of Freshwater and Electricity Based on Three-Dimensional Hierarchical CuO@Cu Foam.

The integration of solar steam generation and the hydrovoltaic effect is a promising strategy for simultaneously solving water scarcity and energy crises. However, it is still a challenge to attain a high water evaporation rate and a strong output of electricity in a single device. Here, we report a three-dimensional (3D) hierarchical CuO@Cu foam for solar-driven harvesting of freshwater and electricity efficiently.