An Efficient Electrocatalyst based on Platinum Incorporated into N,S co-doped Porous Graphene for Oxygen Reduction Reaction in Microbial Fuel Cell

摘要

In this work, an efficient electrocatalyst nanomaterial for application in fuel cells was introduced. Thenanomaterial was prepared through platinum incorporation into the S,N co-doped porous graphene(PG) through pyrolysis method. The physico-chemical properties of the prepared samples werecharacterized using X-ray Diffraction (XRD), Raman spectroscopy, N2 sorption-desorption,Transmission Electron Microscopy (TENM), Field Emission Scanning Electron Microscopy (FESEM)and X-ray Photoelectron Spectroscopy (XPS). The synthesized samples were further applied foroxygen reduction reaction (ORR) and evaluation in microbial fuel cell (MFC). The results revealedthat impregnation of 10 wt.% Pt into the nitrogen and sulfur co-doped graphene structure (called GSTP-900-Pt 10) cause more improvement in catalytic activity compared to 20 wt.% Pt/C. Also, LSVmeasurements confirmed an improved onset potential (1.00 V) for G-STP-900-Pt 10 sample incomparison with 20 wt.% Pt/C (0.99 V vs. RHE). Furthermore, microbial fuel cell test showed highercell potential and power density relative to Pt/C 20 wt.% too. Finally, for economic purpose, theoptimal sample with lower Pt amount (10 wt.% Pt) was selected as a good candidate for ORR inMFCs.