Browsing Faculty of Natural Sciences by Author "Pasupathi, Sivakumar"
Now showing items 1-13 of 13
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Effects of heat treatment on the catalytic activity and methanol tolerance of carbon-supported platinum alloys
Valisi, Andiswa; Maiyalagan, Thandavarayan; Khotseng, Lindiwe; Linkov, Vladimir; Pasupathi, Sivakumar (Springer, 2012)This work studies the effect of heat treatment of carbon-dispersed platinum and platinum alloys on its methanol tolerance and catalytic activity as gas diffusion electrodes for oxygen reduction reaction (ORR) in acid medium. ... -
Enhanced performance of polybenzimidazole-based high temperature proton exchange membrane fuel cell with gas diffusion electrodes prepared by automatic catalyst spraying under irradiation technique
Su, Huaneng; Pasupathi, Sivakumar; Bladergroen, Bernard Jan; Linkov, Vladimir; Pollet, Bruno G. (Elsevier, 2013)Gas diffusion electrodes (GDEs) prepared by a novel automatic catalyst spraying under irradiation (ACSUI) technique are investigated for improving the performance of phosphoric acid (PA)-doped polybenzimidazole (PBI) high ... -
Fuel cell-battery hybrid powered light electric vehicle (golf cart): Influence of fuel cell on the driving performance
Tolj, Ivan; Lototskyy, Mykhaylo; Davids, Moegamat Wafeeq; Pasupathi, Sivakumar; Swart, Gerhard; Pollet, Bruno G. (Elsevier, 2013)A light electric vehicle (golf cart, 5 kW nominal motor power) was integrated with a commercial 1.2 kW PEM fuel cell system, and fuelled by compressed hydrogen (two composite cylinders, 6.8 L/300 bar each). Comparative ... -
Multi-objective optimization of a metal hydride reactor coupled with phase change materials for fast hydrogen sorption time
Pasupathi, Sivakumar; Nyamsi, Serge Nyallang; Tolj, Ivan (Journal of Energy Storage, 2023)Recently, the utilization of phase change materials (PCM) for the heat storage/recovery of the metal hydride's reaction heat has received increasing attention. However, the poor heat management process makes hydrogen ... -
Multi-objective optimization of a metal hydride reactor coupled with phase change materials for fast hydrogen sorption time
Nyamsi, Serge Nyallang; Pasupathi, Sivakumar; Tolj, Ivan (Elsevier, 2023)Recently, the utilization of phase change materials (PCM) for the heat storage/recovery of the metal hydride's reaction heat has received increasing attention. However, the poor heat management process makes hydrogen ... -
Nafion-stabilised platinum nanoparticles supported on titanium nitride: An efficient and durable electrocatalyst for phosphoric acid based polymer electrolyte fuel cells
Kumar, Ravi; Pasupathi, Sivakumar; Pollet, Bruno G.; Scott, Keith (Elsevier, 2013)Nafion derived platinum nanoparticles were produced and successfully anchored on titanium nitride (TiN) support (Pt/TiN) and its suitability for phosphoric acid based polymer electrolyte membrane fuel cells is reported. ... -
Optimisation of electrophoretic deposition parameters for gas diffusion electrodes in high temperature polymer electrolyte membrane fuel cells
Felix, Cecil; Jao, Ting-Chu; Pasupathi, Sivakumar; Pollet, Bruno G. (Elsevier, 2013)Electrophoretic deposition (EPD) method was used to fabricate gas diffusion electrodes (GDEs) for high temperature polymer electrolyte membrane fuel cells (HT PEMFC). Parameters related to the catalyst suspension and the ... -
Optimization of gas diffusion electrode for polybenzimidazole-based high temperature proton exchange membrane fuel cell: Evaluation of polymer binders in catalyst layer
Su, Huaneng; Pasupathi, Sivakumar; Bladergroen, Bernard Jan; Linkov, Vladimir; Pollet, Bruno G. (Elsevier, 2013)Gas diffusion electrodes (GDEs) prepared with various polymer binders in their catalyst layers (CLs) were investigated to optimize the performance of phosphoric acid doped polybenzimidazole (PBI)-based high temperature ... -
Pt-Sn/C as a possible methanol-tolerant cathode catalyst for DMFC
Martin, Lynwill G.; Green, Ivan; Wang, X.; Pasupathi, Sivakumar; Pollet, Bruno G. (Springer Verlag, 2013)An effective method was developed for preparing highly dispersed nano-sized Pt–Sn/C electrocatalyst synthesised by a modified polyol reduction method. From XRD patterns, the Pt–Sn/C peaks shifted slightly to lower 2θ angles ... -
RuxNb1-xO2 catalyst for the oxygen evolution reaction in proton exchange membrane water electrolysers
Puthiyapura, Vinod Kumar; Pasupathi, Sivakumar; Basu, Suddhasatwa; Wu, Xu; Su, Huaneng; Varagunapandiyan, N.; Pollet, Bruno G.; Scott, Keith (Elsevier, 2013)Bimetallic catalyst system of ruthenium oxide (RuO2) and niobium oxide (Nb2O5) was prepared using the Adams method and the hydrolysis method. Physical and electrochemical characterizations of the catalysts were studied ... -
Synthesis, characterisation and evaluation of IrO2 based binary metal oxide electrocatalysts for oxygen evolution reaction
Felix, Cecil; Maiyalagan, Thandavarayan; Pasupathi, Sivakumar; Bladergroen, Bernard Jan; Linkov, Vladimir (Electochemical Society Inc., 2012)IrO2, IrxRu1-xO2, IrxSnx-1O2 and IrxTax-1O2 (1 ≥ x ≥ 0.7) were synthesized, characterised and evaluated as electrocatalysts for the oxygen evolution reaction in solid polymer electrolyte electrolysers. The electrocatalysts ... -
Thermal conductivity and temperature profiles of the micro porous layers used for the polymer electrolyte membrane fuel cell
Burheim, Odne S.; Su, Huaneng; Pasupathi, Sivakumar; Pharoah, Jon G.; Pollet, Bruno G. (Elsevier, 2013)The thermal conductivity and the thickness change with pressure of several different micro porous layers (MPL) used for the polymer electrolyte membrane fuel cell (PEMFC) were measured. The MPL were made with different ... -
Validation of an externally oil-cooled 1 kWel HT-PEMFC stack operating at various experimental conditions
Bujlo, P.; Pasupathi, Sivakumar; Ulleberg, Ø.; Scholta, J.; Nomnqa, M.V.; Rabiu, A.; Pollet, Bruno G. (Elsevier, 2013)The performance of 1 kWel 48-cell HT-PEMFC at various experimental conditions is presented, particularly at several CO concentrations (up to 1.0%). Polarization curves measured at various anode (1.0-2.5) and cathode (1.6-4.0) ...