Fig. 8From: Photocatalytic and electrocatalytic approaches towards atmospheric nitrogen reduction to ammonia under ambient conditions(Reproduced with permission [37] Copyright 2018, American Chemical Society)a AUHNCs dispersed in DI water. b UV–vis spectra of AgNCs and AuHNCs with various peak LSPR values. c TEM images displaying AuHNCs with peak LSPR at 635, 715 and 795 nm. d NH3 yield rate and Faradaic efficiency for the various LSPR peak values at − 0.4 VBack to article page