期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 942, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.169071
关键词
Photocatalysis; Hydrogen evolution; ZnO; rGO hybrids; Bandgap tuning
In the future hydrogen economy, there is a need to replace platinum-based catalysts due to economic constraints. Developing cost-effective, durable, and efficient catalysts is a relevant research frontier.
The future hydrogen economy urges to replace platinum-based catalysts since large-scale production of hydrogen using platinum is not economically viable to deal with the influx of interest. Developing cost-effective, durable, and efficient catalysts is one of the most relevant research frontiers. Herein, inter-connected and {1010} faceted 2D zinc oxide decorated on graphene sheets was effectively fabricated by a simple CTAB-assisted microwave technique and has been intensively investigated for photocatalytic dye degradation and electrocatalytic hydrogen evolution. The XRD and Raman spectra confirm the in-situ re-duction of GO to rGO and successful synthesis of ZnO/rGO hybrids. Compared with the pure ZnO, as -ob-tained ZnO/rGO hybrids exhibited good stability and superior photocatalytic efficiency under visible-light irradiation, owing to reduced electron-hole pair recombination upon GO incorporation, as affirmed by PL spectra, TRPL lifetime measurements, and photocurrent responses. The 2D/2D ZnO/rGO hybrid nanos-tructure showed optimised material properties for exceptional electrochemical H2 evolution, producing a current density of - 10 mA/cm2 at a significantly reduced overpotential of - 810 mV vs. RHE, and a Tafel slope of 157 mV/dec in 0.5 M H2SO4. The enhanced catalytic activity can be attributed to the introduction of rGO sheets, which improved the surface area and electrical conductivity of the sample. The multifunctional nature of ZnO/rGO hybrids in both photocatalysis and electrocatalysis sheds light upon environmental pollution and the energy crisis.(c) 2023 Elsevier B.V. All rights reserved.
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