Enhancing electro-reduction of nitrite to ammonia by loading CoO on CuO to construct elecrocatalytic dual-sites.

Improving the performance of CuO in electrocatalytic nitrite reduction to ammonia (NIRA) is the priority for designing efficient NIRA electrocatalysts. The electrocatalytic activity of CuO was enhanced by growing CoO nanospheres on it. By comparing CoO@CuO with the mechanically mixed CuO and CoO on a rotating ring-disk electrode, we discovered that the enhancement was attributed to a dual-site catalytic pathway.