fig6
![Recent advances in nonmetallic modulation of palladium-based electrocatalysts](https://image.oaes.cc/13d7015d-9c36-444b-b495-f195319fec14/5415.fig.6.jpg)
Figure 6. Synthesis strategy and positive influence of surface PdCx species. (A) Two typical routes for incorporating C atoms into Pd lattices; (B) TEM image of the PdCx/XC72 catalyst; (C) the comparison of exchange current density of HOR over the PdCx/XC72 (solid line) and oxygen-treated PdCx/XC72 (dashed line); (A-C) reproduced with permission from[97]: Copyright 2012, Elsevier.