Nanoporous graphitic-C3N4@carbon metal-free electrocatalysts for highly efficient oxygen reduction |
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Authors: | Zheng Yao Jiao Yan Chen Jun Liu Jian Liang Ji Du Aijun Zhang Weimin Zhu Zhonghua Smith Sean C Jaroniec Mietek Lu Gao Qing Max Qiao Shi Zhang |
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Institution: | ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD 4072 Brisbane, Australia. |
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Abstract: | Based on theoretical prediction, a g-C(3)N(4)@carbon metal-free oxygen reduction reaction (ORR) electrocatalyst was designed and synthesized by uniform incorporation of g-C(3)N(4) into a mesoporous carbon to enhance the electron transfer efficiency of g-C(3)N(4). The resulting g-C(3)N(4)@carbon composite exhibited competitive catalytic activity (11.3 mA cm(-2) kinetic-limiting current density at -0.6 V) and superior methanol tolerance compared to a commercial Pt/C catalyst. Furthermore, it demonstrated significantly higher catalytic efficiency (nearly 100% of four-electron ORR process selectivity) than a Pt/C catalyst. The proposed synthesis route is facile and low-cost, providing a feasible method for the development of highly efficient electrocatalysts. |
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