Structural optimization of hematite nanorod array as water oxidation photoanodes
Paper ID : 1533-ICNS
Mohammad Elmi1, Behrooz Eftekharinia2, Fereshteh Aramoun3, Pezhman Sasanpour4, Naimeh Naseri5, Abbas Rajabi1, alireza moshfegh *5
1Energy Engineering Department, Sharif University of Technology, Tehran, Iran
2School of Physics, Institute for Research in Fundamental Science (IPM), Tehran, 1953833511, Iran
3Department of Physics, Sharif University of Technology, Tehran, Iran
4Department of Medical Physics and Biomedical Engineering, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5Sharif University of Technology
The optimized geometry and structure of iron oxide nanorod arrays as the photoanodes of photoelectrochemical cells have been calculated. Using finite element method, different structures have been studied in order to maximize the photocurrent density. Two main characteristics of nanorod arrays including the aspect ratio of nanorod and the density of nanorods in array have been selected as the variables. The results show that the current density has a direct relation with the aspect ratio of nanorods and with increasing the aspect ratio, the current density would reach to its theoretical maximum. Furthermore, it is shown that the density of nanorods in the array (number of nanorods per photoanode surface area) has an optimum value which is dependent on aspect ratio of nanorods.
Water oxidation, Hematite photoanodes, Maxwell Equation, Finite Element Method, COMSOL
Status : Abstract Accepted (Poster Presentation)