A tin porphyrin axially-coordinated two-dimensional covalent organic polymer for efficient hydrogen evolution.

Herein, we demonstrate a facile strategy for constructing an efficient and stable hydrogen evolution reaction (HER) catalyst, a tin porphyrin axially-coordinated 2D covalent organic polymer (SnTPPCOP). SnTPPCOP exhibits promising HER activity with a low overpotential of 147 mV at 10 mA cm due to its unique structural properties, ranking among the best records reported recently.

Strongly Coupled Nitrogen-Doped MoC@CoNi Alloy Hybrid Architecture toward Efficient Hydrogen Evolution Reaction.

Development of high-efficiency electrocatalysts for water splitting is a promising channel to produce clean hydrogen energy. Herein, we demonstrate that the combination of nitrogen-doped MoC and CoNi alloy to form a hybrid architecture is an effective way to produce hydrogen from electrochemical water splitting. Benefiting from a combination of mechanisms, the optimized N-MoC@CoNi-650 shows remarkable hydrogen evolution reaction (HER) activity with small overpotentials of 35, 123, and 220 mV to reach the current density of 10, 50, and 100 mA cm in alkaline media, respectively, outperforming most previously reported HER electrocatalysts.

Synergistic optimization promoted overall water splitting of CoSe@NiSe@MoS heterostructured composites.

Herein, the preparation of CoSe@NiSe@MoS composites and the systematic investigation of their water splitting performance as a function of composition have been demonstrated. CoSe@NiSe@MoS-12 with the optimized composition exhibits a current density of 10 mA cm at overpotentials of 81 and 170 mV for HER and OER in alkaline conditions, respectively. The overall water splitting device built using CoSe@NiSe@MoS-12 exhibited a low voltage of 1.