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In‐Situ Electrodeposition of Rhodium nanoparticles Anchored on Reduced Graphene Oxide nanosheets as an Efficient Oxygen Reduction Electrocatalyst
Author(s) -
Sookhakian M.,
Tong Goh Boon,
Alias Y.
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5370
Subject(s) - electrocatalyst , graphene , chemistry , rhodium , cyclic voltammetry , glassy carbon , rotating disk electrode , x ray photoelectron spectroscopy , raman spectroscopy , linear sweep voltammetry , oxide , electrochemistry , nanoparticle , catalysis , inorganic chemistry , chemical engineering , platinum , electrode , nanotechnology , materials science , organic chemistry , physics , optics , engineering
A simple, versatile, and cost‐effective one‐pot electrochemical deposition is used to fabricate rhodium (Rh) nanoparticles decorated surface of reduced graphene oxide (rGO) functionalized glassy carbon electrode (GCE) for oxygen reduction reaction (ORR) in alkaline media. The chemical and physical structure of the sample is probed via transmission electron microscopy, rotating disk electrode (RDE), X‐ray photoelectron spectroscopy, linear sweep voltammetry, and Raman spectroscopy. The synergistic effects between the unique properties of Rh nanoparticles and rGO creates such innovative hybrid that exhibits a catalytic activity comparable to that of the commercial platinum electrocatalyst (Pt/C). As a result, the as‐electrodeposited Rh@rGO hybrid exhibits outstanding ORR activity in alkaline media, as evidenced by a larger diffusion‐limited current, greater positive onset potential, much better stability and methanol tolerance than Pt/C under the same conditions.