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Fig. 7 | BMC Materials

Fig. 7

From: Noble metal-free two dimensional carbon-based electrocatalysts for water splitting

Fig. 7

a Illustration of the synthetic routes of N-doped porous carbon. Comparison of the b onset potentials and c Tafel slopes of N-doped porous carbon prepared at 1000 °C with other controlled samples. ac Reproduced with permission from Ref. [112]. Copyright 2019, Royal Society of Chemistry. d Schematic representation of synthesis of NPMC foams. e The OER volcano plots correlating the overpotential versus adsorption energy of O* and the difference between the adsorption energy of O* and OH* for N-doped, P-doped, and N, P-doped graphene, respectively. f Free energy diagram for the OER pathway. df Reproduced with permission from Ref. [113]. Copyright 2015, Nature Publishing Group

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