In order to help the introduction on the automotive market of polymer electrolyte fuel cells (PEFCs), it is mandatory to develop highly performing and stable catalysts. The main objective of this work is to investigate PtNi/C catalysts in a PEFC under low relative humidity and pressure conditions, more representative of automotive applications. Carbon supported PtNi nanoparticles were prepared ...

The catalytic addition of alkenes and amines (hydroamination) typically provides α- or β-amino stereocenters directly through C-N or C-H bond formation. Alternatively, desymmetrization reactions of symmetrical aminodialkenes or aminodialkynes provide access to stereogenic centers with the position controlled by the substrate's structure. In the present study of an enantioselective zirconium-cat...

Despite great progress in the development of nonprecious metal catalysts (NPMCs) over the past several decades, the performance and stability of these promising catalysts have not yet achieved commercial readiness for proton exchange membrane fuel cells (PEMFCs). Through rational design of the cathode catalyst layer (CCL), we demonstrate the highest reported performance for an NPMC-based membra...

0016-2361/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.fuel.2011.03.042 Abbreviations: CFME, chicken fat methyl esters; American society of testing and materials; KOH, p sodium hydroxide; KOMe, potassium methoxide; NaO ⇑ Corresponding author at: Department of Automo Kocaeli University, 41380 Kocaeli, Turkey Tel.: +90 3032203. E-mail addresses: [email protected], Canakci). In t...

This research focuses on the production of biodiesel from low cost feedstock such as Melothria madraspatana seed oil via MnCO3 catalyzed transesterification process at 60°C, investigating the effects of process parameters such as molar ratio of feedstock to methanol, catalyst quantity, and reaction time on biodiesel yield. The biodiesel was successfully produced via transesterification process ...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Petri Kanninen Name of the doctoral dissertation Characterization of nanostructured catalysts and silicon microstructures in polymer electrolyte membrane fuel cells Publisher School of Chemical Technology Unit Department of Chemistry Series Aalto University publication series DOCTORAL DISSERTATIONS 76/2014 Field of research Ph...

Developing light-driven acid catalyst will be very meaningful for the controlled-acid catalytic processes towards a green chemical industry. Here, based on scanning electrochemical microscopy (SECM) and ΔpH testing, we demonstrate that the 5-10 nm carbon quantum dots (CQDs) synthesized by electrochemical ablation of graphite have strong light-induced proton properties under visible light in sol...

Increasing the activity of a photocatalyst goes through the improvement of both its absorption (light) and adsorption (reactant) properties. For a given semiconducting material, the charge carrier separation is also a very important step. Properly combining chosen phases is one option to improve this separation (example of the commercial P25) and depositing platinum on the surface of the cataly...

The Coumarine heterocyclic ring is common feature of various bioactive compounds such as calanolides, lipid-lowering agents. The Chemists all over the globe are motivated not only for the environmentally benign synthesis of new products but also to develop green synthesis for existing chemicals. Coumarins, the most important classes of fluorescent molecules constitute important structural featu...