Modifying Microenvironment in Van der Waals Gap by Cu/N Co-Doping Strategy for Highly Efficient Nitrite Reduction to Ammonia.

Electroreduction of nitrite to ammonia has significant promise for economical NH electrosynthesis and wastewater treatment. Herein, sulfur vacancies rich Cu─N co-doped SnS nanosheet is designed as a highly active and durable NORR catalyst. Benefiting from the Cu─N co-doped strategy, Cu/N-SnS achieves the highest NH yield rate of 18.

Boosting Electrochemical Reduction of Nitrate to Ammonia by Constructing Nitrate-Favored Active Cu-B Sites on SnS.

The electrochemical reduction of nitrate to ammonia is an effective method for mitigating nitrate pollution and generating ammonia. To design superior electrocatalysts, it is essential to construct a reaction site with high activity. Herein, a simple two-step method is applied to in situ reduce amorphous copper over boron-doped SnS nanosheets(denoted as aCu@B-SnS.

Introducing oxygen vacancies in a bi-metal oxide nanosphere for promoting electrocatalytic nitrogen reduction.

The sluggish breakage of the N-N triple bond, as well as the existence of a competing hydrogen evolution reaction (HER), restricts the nitrogen reduction reaction process. Modification of the catalyst surface to boost N adsorption and activation is essential for nitrogen fixation. Herein, we introduced surface oxygen vacancies in bimetal oxide NiMnO by pyrolysis at 450 °C (450-NiMnO) to achieve remarkable NRR activity.