Search
Cathodically activated Au/TiO2 nanocomposite synthesized by a new facile solvothermal method: An efficient electrocatalyst with Pt-like activity for hydrogen generation
Abstract
We report here a facile, template-free and one-step solvothermal approach for the synthesis of high-temperature stable gold/titania nanocomposite (NCs), providing a new, simple, quick and inexpensive wet-chemical route. Our approach is based on the assembly of gold salt and titanium butoxide in dimethyl sulfoxide (DMSO). Also, we present here, for the first time, a cathodically activated Au/TiO2 catalyst with Pt/C activity for the hydrogen evolution reaction (HER) in 0.5 M H2SO4 in the dark. The as-prepared (unactivated) Au/TiO2 NCs exhibits considerable electrocatalytic activity for H2 generation in the dark, with a low onset potential (EHER) of −64 mV vs. RHE, a Tafel slope (-bc) of 60 mV dec−1 and an exchange current density (jo) of 0.12 mA cm−2. Long-term stability and durability tests in 0.5 M H2SO4, employing cyclic voltammetry technique (10,000 of repetitive cycling) and 72 h of chronoamperometry measurements at a high cathodic potential (cathodic activation), reveal that the electrocatalyst activates during such aging processes yielding an activated Au/TiO2 catalyst with Pt/C-like activity for H2 generation (EHER -3 mV, -bc: 35 mV dec−1, and jo: 0.95 mA cm−2). The outstanding HER activity of the activated catalyst is discussed.
Citations
-
5 3
CrossRef
-
0
Web of Science
-
4 7
Scopus
Authors (9)
-
A. Mezni
- Taif University Department of Chemistry
-
Mohamed Ibrahim
- Taif University Department of Chemistry
-
M. El-kemary
- Kafrelsheikh University Chemistry Department
-
A. Shaltout
- Taif University Physics Department
-
Nasser Mostafa Ph.D.
- Taif University Department of Chemistry
-
T. Kumeria
- The University of Queensland School of Pharmacy
-
T. Altalhi
- Taif University Department of Chemistry
-
Mohammed Amin Prof.
- Taif University Department of Chemistry
Cite as
Full text
full text is not available in portal
Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
ELECTROCHIMICA ACTA
no. 290,
pages 404 - 418,
ISSN: 0013-4686 - Language:
- English
- Publication year:
- 2018
- Bibliographic description:
- Mezni, A., Ibrahim M., El-Kemary, M., Shaltout, A., Mostafa N., Ryl J., Kumeria, T., Altalhi, T., Amin M.: Cathodically activated Au/TiO2 nanocomposite synthesized by a new facile solvothermal method: An efficient electrocatalyst with Pt-like activity for hydrogen generation// ELECTROCHIMICA ACTA. -Vol. 290, (2018), s.404-418
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.electacta.2018.08.083
- Verified by:
- Gdańsk University of Technology
seen 141 times
Recommended for you
Enhanced hydrogen evolution reaction on highly stable titania-supported PdO and Eu2O3 nanocomposites in a strong alkaline solution
- M. Ibrahim,
- A. Mezni,
- M. Alsawat
- + 8 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
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