Search
Enhanced hydrogen evolution reaction on highly stable titania-supported PdO and Eu2O3 nanocomposites in a strong alkaline solution
Abstract
In this work, PdO/TiO2 and Eu2O3/TiO2 nanocomposites (NCs), were synthesized using a new facile, template-free and one-step solvothermal approach, and characterized by several instrumentation techniques. X-ray photoelectron spectroscopy (XPS) studies revealed the presence of oxidised form of the Pd and Eu nanoparticles within the nanocomposite materials (PdO and Eu2O3). The two catalysts exhibited remarkable activity for the HER in a strong alkaline solution (4.0 M NaOH) with PdO/TiO2 catalyst being the best, which recorded an exchange current density (jo) of 0.26 mA cm-2 and a Tafel slope (βc) of 125 mV dec-1. Such parameters are not far from those recorded for a commercial Pt/C catalyst (0.71 mA cm-2 and 120 mV dec-1) performed here under the same operating conditions. Eu2O3/TiO2 catalyst recorded jo and βc values of 0.05 mA cm-2 and 135 mV dec-1. The Tafel slopes 125 and 135 mV dec-1 calculated on the PdO/TiO2 and Eu2O3/TiO2 catalysts suggest a HER kinetics controlled by the Volmer step. PdO/TiO2 catalyzed the HER with a high turnover frequency (TOF) of 2.3 H2/s at 0.2 V versus the reversible hydrogen electrode (RHE), while Eu2O3/TiO2 catalyst only measured a TOF value of 1.25 H2/s at the same overpotential. The two catalysts exhibited excellent stability and durability after 10,000 cycles and 72 h of controlled potential electrolysis at a high cathodic overpotential, reflecting their practical applicability. SEM and XPS examinations revealed that the morphology and chemistry of both catalysts were not altered as a result of the performed long-term stability and durability tests
Citations
-
2 2
CrossRef
-
0
Web of Science
-
2 3
Scopus
Authors (11)
-
Mohamed Ibrahim
- Department of Chemistry Taif University
-
Amine Mezni
- Department of Chemistry Taif University
-
Mohammed Alsawat
- Department of Chemistry Taif University
-
T. Kumeriah
- School of Pharmacy University of Queensland
-
Manash Das
- CSIR‐NEIST Academy of Scientific and Innovative Research
-
Shaykla Alzahly
- King Abdullah Institute for Nanotechnology King Saud University
-
Ali Aldalbahi
- Department of Chemistry King Saud University
-
Mohammed Amin Prof.
- Department of Chemistry Taif University
-
Tariq Altalhi
- Department of Chemistry Taif University
Cite as
Full text
full text is not available in portal
Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
no. 43,
pages 5367 - 5383,
ISSN: 0363-907X - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Ibrahim M., Mezni A., Alsawat M., Kumeriah T., Das M., Alzahly S., Aldalbahi A., Górnicka K., Ryl J., Amin M., Altalhi T.: Enhanced hydrogen evolution reaction on highly stable titania-supported PdO and Eu2O3 nanocomposites in a strong alkaline solution// INTERNATIONAL JOURNAL OF ENERGY RESEARCH. -Vol. 43, iss. 10 (2019), s.5367-5383
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/er.4629
- Verified by:
- Gdańsk University of Technology
seen 124 times
Recommended for you
Cathodically activated Au/TiO2 nanocomposite synthesized by a new facile solvothermal method: An efficient electrocatalyst with Pt-like activity for hydrogen generation
- A. Mezni,
- M. Ibrahim,
- M. El-kemary
- + 6 authors
Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium
- M. Szkoda,
- A. Ilnicka,
- M. Skorupska
- + 2 authors
Aluminum-TiO2 NPs Composites as Non-precious Catalysts for Efficient Electrochemical Generation of Hydrogen
- M. Amin,
- E. Ahmed,
- N. Mostafa
- + 6 authors
Cathodic Activation of Titania-Fly Ash Cenospheres for Efficient Electrochemical Hydrogen Production: A Proposed Solution to Treat Fly Ash Waste
- T. Altalhi,
- A. Mezni,
- M. Ibrahim
- + 10 authors