Figure 9.

a) Reduction degree and NH₃ yield rates of PdO/CNTs with different irradiation times. b) Alternative hydriding pathway for NRR on the PdO–Pd interface. Reproduced with permission.^{[ 164 ]} Copyright 2019, Royal Society of Chemistry. c) N₂‐TPD profiles of different catalysts. d) NH₃ yield rates and FEs of different catalysts at −0.7 V versus RHE. Reproduced with permission.^{[ 165 ]} Copyright 2020, Royal Society of Chemistry. e) Schematic illustration of the preparation of core–shell Co₃O₄@NC. f) NH₃ yield rates and FEs of different catalysts at −0.2 V versus RHE. Reproduced with permission.^{[ 166 ]} Copyright 2019, American Chemical Society.