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Amin MA, Ahmed EM, Mostafa NY, et al. Aluminum Titania Nanoparticle Composites as Nonprecious Catalysts for Efficient Electrochemical Generation of H2. ACS Appl Mater Interfaces. 2016;8(36):23655-67doi: 10.1021/acsami.6b05630.
Amin, M. A., Ahmed, E. M., Mostafa, N. Y., Alotibi, M. M., Darabdhara, G., Das, M. R., Wysocka, J., Ryl, J., & Abd El-Rehim, S. S. (2016). Aluminum Titania Nanoparticle Composites as Nonprecious Catalysts for Efficient Electrochemical Generation of H2. ACS applied materials & interfaces, 8(36), 23655-67. https://doi.org/10.1021/acsami.6b05630
Amin, Mohammed A, et al. "Aluminum Titania Nanoparticle Composites as Nonprecious Catalysts for Efficient Electrochemical Generation of H2." ACS applied materials & interfaces vol. 8,36 (2016): 23655-67. doi: https://doi.org/10.1021/acsami.6b05630
Amin MA, Ahmed EM, Mostafa NY, Alotibi MM, Darabdhara G, Das MR, Wysocka J, Ryl J, Abd El-Rehim SS. Aluminum Titania Nanoparticle Composites as Nonprecious Catalysts for Efficient Electrochemical Generation of H2. ACS Appl Mater Interfaces. 2016 Sep 14;8(36):23655-67. doi: 10.1021/acsami.6b05630. Epub 2016 Sep 01. PMID: 27538434.
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ACS Appl Mater Interfaces. 2016 Sep 14;8(36):23655-67. doi: 10.1021/acsami.6b05630. Epub 2016 Sep 01.

Aluminum Titania Nanoparticle Composites as Nonprecious Catalysts for Efficient Electrochemical Generation of H2.

ACS applied materials & interfaces

Mohammed A Amin, Emad M Ahmed, Nasser Y Mostafa, Mona M Alotibi, Gitashree Darabdhara, Manash R Das, Joanna Wysocka, Jacek Ryl, Sayed S Abd El-Rehim

Affiliations

  1. Materials Science and Engineering Group, Department of Chemistry, Faculty of Science, Taif University , 888 Hawiya, Taif, Saudi Arabia.
  2. Department of Chemistry, Faculty of Science, Ain Shams University , 11566 Abbassia, Cairo, Egypt.
  3. Materials Science and Engineering Group, Physics Department, Faculty of Science, Taif University , 888 Hawiya, Taif, Saudi Arabia.
  4. Solid State Physics Department, National Research Center , Dokki, Giza 12311, Egypt.
  5. Chemistry Department, Faculty of Science, Suez Canal University , Ismailia, Egypt.
  6. Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology , Jorhat 785006, Assam, India.
  7. Academy of Scientific and Innovative Research, CSIR-NEIST Campus , India.
  8. Department of Electrochemistry, Corrosion and Materials Engineering, Chemical Faculty, Gda?sk University of Technology , Narutowicza 11/12, 80-233 Gda?sk. Poland.

PMID: 27538434 DOI: 10.1021/acsami.6b05630

Abstract

In this paper, we demonstrated, for the first time, aluminum titania nanoparticle (Al-TiO2 NP) composites with variable amounts of TiO2 NPs as nonprecious active catalysts for the electrochemical generation of H2. These materials were synthesized by mixing desired amounts of hydrogen titanate nanotubes (TNTs), fabricated here by a cost-effective approach at moderate hydrothermal conditions, with aluminum powder (purity 99.7%; size 35 μm). The mixture was compacted under an applied uniaxial stress of 300 MPa followed by sintering at 500 °C for 1 h. After sintering had been completed, all TNTs were found to convert to TiO2 NPs (average particle size 15 nm). Finally, Al-xTiO2 NP nanocomposites (x = 1, 3, 5, and 10) were obtained and characterized by scanning electron microscopy/energy-dispersive X-ray, X-ray diffraction, and X-ray photoelectron spectroscopy. The hydrogen evolution reaction (HER) activity of these materials was studied in 0.5 M H2SO4 at 298 K using polarization and impedance measurements. The nanocomposite of chemical composition Al-5% TiO2 NPs showed the best catalytic performance for the HER, with an onset potential (EHER), a Tafel slope (βc), and an exchange current density (j0) of -100 mV (RHE), 59.8 mV decade(-1), and 0.14 mA cm(-2), respectively. This HER activity is not far from that of the commercial platinum/carbon catalyst (EHER = 0.0 mV, βc = 31 mV dec(-1), and j0 = 0.78 mA cm(-2)). The best catalyst also exhibited good stability after 10000 repetitive cycles with negligible loss in current.

Keywords: aluminum; electrocatalysis; hydrogen evolution reaction; nanocomposites; titania nanoparticles

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