Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 13, Pages 7779-7787Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.08.214
Keywords
Photoelectrochemical cell; Water splitting; Bismuth nanoparticles; Reduced graphene oxide; Surface plasmon resonance; Charge transportation
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Funding
- CSIR
- DST-Inspire, New Delhi, India [IF170949]
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We report the application of plasmonic Bi nanoparticles supported rGO/BiVO4 anode for photoelectrochemical (PEC) water splitting. Nearly, 2.5 times higher activity was observed for Bi-rGO/BiVO4 composite than pristine BiVO4. Typical results indicated that Bi-rGO/BiVO4 exhibits the highest current density of 6.05 mA/cm(2) at 1.23 V, whereas Bi BiVO4 showed the current density of only 3.56 mA/cm(2). This enhancement in PEC activity on introduction of Bi-rGO is due to the surface plasmonic behavior of BiNPs, which improves the absorption of radiation thereby reduces the charge recombination. Further, the composite electrode showed good solar to hydrogen conversion efficiency, appreciable incident photon-to-current efficiency and low charge transfer resistance. Hence, Bi-rGO/BiVO4 provides an opportunity to realize PEC water splitting. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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