Hydrogen Generation Over Cobalt Containing Microporous Aluminohosphates Photo-Catalyst

5 Pages Posted: 10 Jul 2018

See all articles by A. Bouchama

A. Bouchama

Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques,

Amel Boudjemaa

Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques,

H. Hentit

University of Mostaganem

J. C. Jumas

Université Montpellier II

K. Bachari

Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques,

M. S. Ouali

University of Mostaganem

Date Written: July 10, 2018

Abstract

Novel photo-catalytic materials based on cobalt type aluminophosphate molecular sieves have been elaborated in AEL and AFI structure by hydrothermal method. The photo-catalytic activity of CoAlPO4-5 and CoAlPO4-11 were evaluated for hydrogen production via water reduction under visible irradiation.The synthesizedmaterials werecharacterized thoroughly with respect toelemental analysis, X-Ray diffraction (XRD), scanning electron microscopy(SEM), fourier transform infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DR), N2 adsorption (BET) and NH3 desorption measurement. Electrical conductivity, electrochemical and photo-electrochemical measurementssuch as cyclic voltammetry, currents-potential, Mott-schottky and Nykist were also studied.SinceAlPO4 materials possess a unique chemical composition as well as structural and micro-morphological characteristics. The photo-catalystshave shown a more negative flat band potential (Vfb = 0.31 eV) and a remarkable surface area -- 183 and 258 m2 g-1 which lead to a better accelerationof the charge (e-/h ) transfer by increasing the number of surface reaction sites.In this approach, hydrogen was produced at atmospheric pressure and a temperature of 50 °C. Under visible light, the photo-catalysts exhibited a good photo-catalytic activity for hydrogen production with a yield of 64 and 1260 µmol g-1min-1 for CoAlPO4-5 and CoAlPO4-11, respectively.

Keywords: CoAlPO4-5, CoAlPO4-11,nano-cobalt oxide,photo-electrochemical, photo-catalysis, hydrogen evolution

Suggested Citation

Bouchama, A. and Boudjemaa, Amel and Hentit, H. and Jumas, J. C. and Bachari, K. and Ouali, M. S., Hydrogen Generation Over Cobalt Containing Microporous Aluminohosphates Photo-Catalyst (July 10, 2018). PAUWES Research-2-Practice Forum 2018. Available at SSRN: https://ssrn.com/abstract=3211258 or http://dx.doi.org/10.2139/ssrn.3211258

A. Bouchama

Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques,

BP 384
Siège ex-Pasna Zone Industrielle, Bou-Ismail
Tipaza 42004
Algeria

Amel Boudjemaa (Contact Author)

Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, ( email )

BP 384
Siège ex-Pasna Zone Industrielle, Bou-Ismail
Tipaza 42004
Algeria

H. Hentit

University of Mostaganem

Avenue Hamadou Hossine
Mostaganem
Algeria

J. C. Jumas

Université Montpellier II

Place eugène Bataillon
Montpellier, 34000
United States

K. Bachari

Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques,

BP 384
Siège ex-Pasna Zone Industrielle, Bou-Ismail
Tipaza 42004
Algeria

M. S. Ouali

University of Mostaganem

Avenue Hamadou Hossine
Mostaganem
Algeria

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