am0c12838_si_001.pdf (854.61 kB)

Constructing Conductive Channels between Platinum Nanoparticles and Graphitic Carbon Nitride by Gamma Irradiation for an Enhanced Oxygen Reduction Reaction

Download (854.61 kB)
journal contribution
posted on 30.09.2020, 02:43 by Xiang Shi, Wei Wang, Xiaran Miao, Feng Tian, Zhiwei Xu, Nan Li, Miaolei Jing
Electrocatalytic performance of low-cost graphitic carbon nitride (g-C3N4) is greatly limited by its conductivity. In this work, an innovative method, gamma irradiation technology, was used to efficiently synthesize g-C3N4/Pt nanoparticle (CN/Pt) nanocomposites, which can construct conductive channels between the nanostructure g-C3N4 and supported platinum nanoparticles (PtNPs). Then, the as-prepared CN/Pt nanocomposites were applied in the oxygen reduction reaction (ORR) as an electrocatalyst, which shows a small Tafel slope and the fast four-electron transfer path in the ORR. The oxygen reduction performance over the CN/Pt nanocomposite is much superior to that of the commercial Pt/C and mostly reported in g-C3N4-based electrodes. Experimental results have confirmed the fast charge transfer between PtNPs and g-C3N4 through a metal–support interaction, and using gamma irradiation technique to disperse PtNPs on g-C3N4 proves to be an effective strategy to enhance the catalytic performance of g-C3N4 in ORR. Therefore, gamma irradiation may possess great potential for preparing CN/Pt nanocomposites as a highly efficient ORR catalyst.

History

Exports