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Enhancement of Catalytic Activity of Reduced Graphene Oxide Via Transition Metal Doping Strategy
1Department of Chemistry, Sookmyung Women's University, Seoul, 04310, Republic of Korea. easyscan@sookmyung.ac.kr.
Abstract:
To compare the catalytic oxidation activities of reduced graphene oxide (rGO) and rGO samples doped with five different transition metals (TM-rGO), we determine their effects on the oxidation of L-cysteine (Cys) in aqueous solution by performing electrochemistry (EC) measurements and on the photocatalytic oxidation of Cys by using high-resolution photoemission spectroscopy (HRPES) under UV illumination. Our results show that Cr-, Fe-, and Co-doped rGO with 3+ charge states (stable oxide forms: Cr3+, Fe3+, and Co3+) exhibit enhanced catalytic activities that are due to the charge states of the doped metal ions as we compare them with Cr-, Fe-, and Co-doped rGO with 2+ charge states. The SEM images and the corresponding EC measurements for (a) Cr3+, (b) Fe3+, and
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