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Development of Porous Nickel Electro-Catalysts for Photo-Water Splitting Using Zn, Co, Mn and NH4+ Based Precursors

Bidurukontham, Aditya V.
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1310131764

Abstract Details

2011, Master of Science, University of Toledo, Chemical Engineering.
Electrodeposited porous Ni electrodes were fabricated to act as electrocatalysts in a photo water splitting reaction. The electrodes were made porous by incorporating various Zn, Mn, Co and NH4+ based precursors. A Watt’s bath was used to make electrodes at 60 °C and at 45 mA/cm2. Enhanced co-deposition of precursor ions was done at 50 mA/cm2. The precursor ions were leached out in 6M KOH for 48 hours to create porosity in the electrode. These electrodes were tested for their current densities against a Pt mesh in both anodic and cathodic conditions. It was observed that electrodes had enhanced anodic and cathodic properties. Some of the precursors favoured the OER and some favoured the HER. The electrode prepared using NH4Cl precursor gave anodic current densities up to 125 mA/cm2 and the electrodes prepared by (NH4)2SO4 generated cathodic current densities up to 200 mA/cm2. Long term stability test were done for 400 hours at 1.8 V and generated current densities of 12.5 mA/cm2. Once the performance of the electrodes was determined 1’ x 1’ electrodes were prepared. These electrodes were used as anode and cathode respectively in a substrate-type photoelectrochemical (PEC) cell used to produce hydrogen and oxygen from 6M KOH. The voltage required to split the water molecule in the electrolyte is generated by a 12” x 11” triple junction a-Si solar cell. The PEC cell gave an efficiency of 2.3 % under a tungsten filament lamp with an intefrated flux of 1000 Wm2.
Dr. Maria Coleman, PhD (Advisor)
Dr. William Ingler, PhD (Committee Member)
Dr. Dong-Shik Kim, PhD (Committee Member)
94 p.
Chemical Engineering; Materials Science
Porous Ni; Electrocatalysts; Photo-water Splitting; Hydrogen production; Etching of precursors

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Citations

  • Bidurukontham, A. V. (2011). Development of Porous Nickel Electro-Catalysts for Photo-Water Splitting Using Zn, Co, Mn and NH4+ Based Precursors [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1310131764

    APA Style (7th edition)

  • Bidurukontham, Aditya. Development of Porous Nickel Electro-Catalysts for Photo-Water Splitting Using Zn, Co, Mn and NH4+ Based Precursors. 2011. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1310131764.

    MLA Style (8th edition)

  • Bidurukontham, Aditya. "Development of Porous Nickel Electro-Catalysts for Photo-Water Splitting Using Zn, Co, Mn and NH4+ Based Precursors." Master's thesis, University of Toledo, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1310131764

    Chicago Manual of Style (17th edition)

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© 2011, all rights reserved.
This open access ETD is published by University of Toledo and OhioLINK.