Modibedi, Remegia MLouw, EMathe, Mahlanyane KOzoemena, K2013-09-302013-09-302013-03Modibedi, M, Louw, E, Mathe, M and Ozoemena, K. 2013. Electro-deposition of Pd on Carbon paper and Ni foam via surface limited redox-replacement reaction for oxygen reduction reaction. In: 13th Topical Meetings of the International Society of Electrochemistry, 7–10 April 2013http://hdl.handle.net/10204/697513th Topical Meetings of the International Society of Electrochemistry, 7–10 April 2013Fuel cells continue to be investigated as alternative energy source because of the high energy demand worldwide. The electrocatalytic reduction of oxygen is of great importance in fuel cells and sensors. Noble metals have proved to be the best electrocatalysts for the oxygen reduction reaction (ORR). Among these electrocatalysts, Pd has attracted enormous attention since it is more abundant and cheaper than Pt. In the pursuit to improve reproducibility while overcoming the loss of catalytic activity during the catalyst preparation process, Pd nanosturctures are grown directly on fuel cell gas diffusion layers and evaluated for the ORR. Pd nanostructures were synthesized via surface-limited redox replacement (SLRR) reaction employing the electrochemical atomic layer deposition technique. Pd was deposited on carbon paper and Ni foam substrates using Cu as a sacrificial metal following the procedure published by Mkwizu et al. The electrochemical activity of the prepared nanostructures towards ORR was investigated in both acidic and alkaline electrolytes at various flow rates. The morphology and particle size of the deposited nanostructures were characterised using microscopy techniques such as scanning electron microscopy (SEM) and atomic force microscopy (AFM). The nanoparticle composition on the substrate was estimated using energy dispersive X-ray spectroscopy (EDX).enPd catalystOxygen reduction reactionORRSurface-limited redox replacementSLRRAlkaline electrolyteNi foamConference PresentationModibedi, R. M., Louw, E., Mathe, M. K., & Ozoemena, K. (2013). Electro-deposition of Pd on Carbon paper and Ni foam via surface limited redox-replacement reaction for oxygen reduction reaction: Presentation. http://hdl.handle.net/10204/6975Modibedi, Remegia M, E Louw, Mahlanyane K Mathe, and K Ozoemena. "Electro-deposition of Pd on Carbon paper and Ni foam via surface limited redox-replacement reaction for oxygen reduction reaction: Presentation." (2013): http://hdl.handle.net/10204/6975Modibedi RM, Louw E, Mathe MK, Ozoemena K, Electro-deposition of Pd on Carbon paper and Ni foam via surface limited redox-replacement reaction for oxygen reduction reaction: Presentation; 2013. http://hdl.handle.net/10204/6975 .TY - Conference Presentation AU - Modibedi, Remegia M AU - Louw, E AU - Mathe, Mahlanyane K AU - Ozoemena, K AB - Fuel cells continue to be investigated as alternative energy source because of the high energy demand worldwide. The electrocatalytic reduction of oxygen is of great importance in fuel cells and sensors. Noble metals have proved to be the best electrocatalysts for the oxygen reduction reaction (ORR). Among these electrocatalysts, Pd has attracted enormous attention since it is more abundant and cheaper than Pt. In the pursuit to improve reproducibility while overcoming the loss of catalytic activity during the catalyst preparation process, Pd nanosturctures are grown directly on fuel cell gas diffusion layers and evaluated for the ORR. Pd nanostructures were synthesized via surface-limited redox replacement (SLRR) reaction employing the electrochemical atomic layer deposition technique. Pd was deposited on carbon paper and Ni foam substrates using Cu as a sacrificial metal following the procedure published by Mkwizu et al. The electrochemical activity of the prepared nanostructures towards ORR was investigated in both acidic and alkaline electrolytes at various flow rates. The morphology and particle size of the deposited nanostructures were characterised using microscopy techniques such as scanning electron microscopy (SEM) and atomic force microscopy (AFM). The nanoparticle composition on the substrate was estimated using energy dispersive X-ray spectroscopy (EDX). DA - 2013-03 DB - ResearchSpace DP - CSIR KW - Pd catalyst KW - Oxygen reduction reaction KW - ORR KW - Surface-limited redox replacement KW - SLRR KW - Alkaline electrolyte KW - Ni foam LK - https://researchspace.csir.co.za PY - 2013 T1 - Electro-deposition of Pd on Carbon paper and Ni foam via surface limited redox-replacement reaction for oxygen reduction reaction: Presentation TI - Electro-deposition of Pd on Carbon paper and Ni foam via surface limited redox-replacement reaction for oxygen reduction reaction: Presentation UR - http://hdl.handle.net/10204/6975 ER -