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We developed sulfur-doped porous graphene frameworks as a highly efficient metal-free electrocatalyst for oxygen reduction reaction (ORR) which was prepared through MgO template directed approach by in situ sulfur doping based on the pyrolysis of p-methylbenzenesulfonic acid. The as-obtained electrocatalyst features distinctive porous graphene frameworks and uniform distribution of sulfur dopants...
3D Porous carbon derived from pine needle is prepared by hydrothermal followed KOH activation process. The high surface area (1175 m2 g−1) and rich hierarchical pores provide the electrode with high capacitance. And the abundant surface oxygen functional groups offer additional pseudo-capacitance, which would increase the capacitance. It delivers the capacitance of 348 F g−1 at 1 A g−1 in a three-electrode...
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