Results and discussion . Synthesis and structural characterization . The SACs were fabricated via a simple molecule-based tailoring strategy using glucose and bulk g-C 3 N 4 as stabilizer and support, respectively (Fig.? 1a ). The detailed synthetic protocol is presented in the Supporting information. The metal contents of the as-prepared SACs were determined to be 7.5, 7.6, 10.5, and 7.5?wt% for Ni-CNG, Co-CNG, Fe-CNG, and NiFe-CNG (CNG?=?N-doped graphene nanosheets prepared with glu...