Synthesis and characterization of novel organometallic-semicondutor nanocomposit photoelectrodes
Başlık:
Synthesis and characterization of novel organometallic-semicondutor nanocomposit photoelectrodes
Yazar:
Göl, Emre Yusuf, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
viii, 74 leaves: charts;+ 1 computer laser optical disc.
Özet:
Studies on novel electrochemical catalyst synthesis for efficient oxygen evolution reaction (OER) attract the attention of researchers. In general, changing of synthesis method and the doping metal affect the electrochemical activities of BSCF. In this work, silver doped Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF-Ag) perovskite structure is shown to be a better electrocatalyst for oxygen evolution reaction (OER) due to its lower overpotential and extended durability. BSCF structure was synthesized by the EDTA-citric acid method. Appropriate amount of Ba(NO3)2 and EDTA were dissolved 0.1 M NH4OH solution. Nitrate salts of other metals were dissolved in distilled water, then mixed with prepared Ba(NO3)2 solution. The mixture was stirred at 70 °C until gelation occurred. The gelled samples obtained were baked in a drying oven at 250 °C for 24 h before being calcined at 1000 °C for 12 h. To achieve a current density of 10 mA cm−2, BSCF-Ag has required an overpotential of 0.36 V, which is very low compared to BSCF. To determine the stability of BSCF-Ag, continuous chronopotentiometry tests were carried out for 5 h and at a constant current density of 10 mA cm−2. BSCF-Ag was characterized by XRD, SEM, and XPS. Recent advances in inkjet printing technology for applications relating to heterogeneous catalysis are presented. Catalysts lie at the heart of most chemical reactions where raw materials are converted to value-added products. Therefore, synthesis and immobilization of active catalysts in the reactor are of great importance. Inkjet printing is an additive manufacturing technology introduced recently as a useful method for the fabrication and application of catalysts as a class of functional materials. Inkjet printing provides special features which can be tailored to the design of high-efficient catalytic processes. This thesis presents an overview of the technology along with developments and challenges associated with the combination of inkjet printing and heterogeneous catalysis, such as ink preparation, thin-film properties and real-life applications.
Yazar Ek Girişi:
Tüzel Kişi Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Doctoral)--İzmir Institute of Technology:Chemistry.
İzmir Institute of Technology:Chemistry --Thesis (Doctoral).
Elektronik Erişim:
Access to Electronic Versiyon.