Synthesis Of Platinum Intermetallic Compounds For Fuel Cell Anode Catalysts
DOWNLOAD
Download Synthesis Of Platinum Intermetallic Compounds For Fuel Cell Anode Catalysts PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Synthesis Of Platinum Intermetallic Compounds For Fuel Cell Anode Catalysts book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Synthesis Of Platinum Intermetallic Compounds For Fuel Cell Anode Catalysts
DOWNLOAD
Author : Laif Robert Alden
language : en
Publisher:
Release Date : 2006
Synthesis Of Platinum Intermetallic Compounds For Fuel Cell Anode Catalysts written by Laif Robert Alden and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Synthesis And Characterization Of Intermetallic Compounds And Transition Metal Nitrides As High Performance Proton Exchange Membrane Fuel Cell Materials
DOWNLOAD
Author : Weitian Zhao
language : en
Publisher:
Release Date : 2014
Synthesis And Characterization Of Intermetallic Compounds And Transition Metal Nitrides As High Performance Proton Exchange Membrane Fuel Cell Materials written by Weitian Zhao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
One of the major challenges in fuel cell technologies, particularly for Proton Exchange Membrane Fuel Cells (PEMFCs), is developing effective catalysts for use in both the anode and cathode. Ordered intermetallic compounds have shown considerable potential for fuel cell applications due to their enhanced catalytic activity, better durability and lower cost. In this work, Pd-Sn intermetallic compounds were investigated. PdSn and Pd3Sn nanoparticles were synthesized under air-free conditions and were tested for their electrochemical properties. Both materials showed poor activities in acidic environment for formic acid and methanol oxidation, but enhanced activities under basic conditions. Various electrochemical tests and structural characterization including high-resolution TEM/STEM and EDX were performed to investigate the changes in these materials that might have resulted in such performance. In this thesis, we also focus on developing stable catalyst supports for fuel cell electrodes, another topic in fuel cell research. Motivated by recent studies which revealed the potential of transition metal nitrides as high performance catalyst supports, we developed a facile synthesis of single-phase, nanocrystalline macroporous chromium nitride and chromium titanium (oxy)nitride with an inverse opal morphology. Characterization using XRD, SEM, HR-TEM/STEM, TGA and XPS is reported. Interconversion of macroporous CrN to Cr2O3 and back to CrN while retaining the inverse opal morphology was also demonstrated. iii.
Synthesis Of Shape Specific Platinum Nanoparticles Their Performance As Fuel Cell Catalysts And Other Novel Nanocomposite Materials For Alternative Energy Technologies
DOWNLOAD
Author : Jason A. Michel
language : en
Publisher:
Release Date : 2007
Synthesis Of Shape Specific Platinum Nanoparticles Their Performance As Fuel Cell Catalysts And Other Novel Nanocomposite Materials For Alternative Energy Technologies written by Jason A. Michel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Fuel cells categories.
Catalysis For Alternative Energy Generation
DOWNLOAD
Author : László Guczi
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-04-17
Catalysis For Alternative Energy Generation written by László Guczi and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04-17 with Science categories.
The increase of greenhouse gases in the atmosphere and the decrease of the available amount of fossil fuels necessitate finding new alternative and sustainable energy sources in the near future. This book summarizes the role and the possibilities of catalysis in the production of new energy carriers and in the utilization of different energy sources. The main goal of this work is to go beyond those results discussed in recent literature by identifying new developments that may lead to breakthroughs in the production of alternative energy. The book discusses the use of biomass or biomass derived materials as energy sources, hydrogen formation in methanol and ethanol reforming, biodiesel production, and the utilization of biogases. Separate sections also deal with fuel cells, photocatalysis, and solar cells, which are all promising processes for energy production that depend heavily on catalysts.
Platinum Monolayer Electrocatalysts
DOWNLOAD
Author : Radoslav Adzic
language : en
Publisher: Springer Nature
Release Date : 2020-08-11
Platinum Monolayer Electrocatalysts written by Radoslav Adzic and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-08-11 with Science categories.
This book describes a science and technology of a new type of electrocatalysts consisting of a single atomic layer of platinum on suitable supports. This development helped overcome three major obstacles—catalysts‘ cost, activity, and stability—for a broad range of fuel cell applications. The volume begins with a short introduction to the science of electrocatalysis, covering four reactions important for energy conversion in fuel cells. A description follows of the properties of metal monolayers on electrode surfaces, and underpotential deposition of metals. The authors then describe the concept of Pt monolayer electrocatalysts and its implications and their synthesis by galvanic displacement of less-noble metal monolayers and other methods. The main part of the book presents a discussion of catalysts’ characterization and catalytic properties of Pt monolayers for the four main reactions of electrochemical energy conversion: oxygen reduction and oxidation of hydrogen, methanol and ethanol. The book concludes with a treatment of scale-up syntheses, fuel cell tests, catalysts’ stability and application prospects.
Synthesis And Characterization Of Platinum Based Multi Component Catalysts For Direct Methanol Fuel Cells
DOWNLOAD
Author : Li Ren
language : en
Publisher:
Release Date : 2007
Synthesis And Characterization Of Platinum Based Multi Component Catalysts For Direct Methanol Fuel Cells written by Li Ren and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Fuel cells categories.
"In the thesis work, Pt-based binary, ternary, quaternary alloy anode catalysts supported on sonochemically treated multi-walled carbon nanotubes (CNTs) were synthesized with ethylene glycol reduction of corresponding metal chloride salts. Inductively coupled plasma-mass spectroscopy (ICP-MS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) were used for catalyst characterization. Cyclic voltammetry for methanol oxidation and CO stripping were used to evaluate the performance of the catalysts. PtRu nanoparticles supported on CNTs (PtRu/CNT) were prepared under a series of pHs. It was found that the PtRu particle size, composition, and catalytic activity were all sensitive to the deposition pHs. CO stripping results provided the peak potential and active surface area for each catalyst. The atomic ratios tended to approach the predetermined ratio 1:1 with the increase of pH, which is favored by bi-functional catalytic mechanism. PtRu catalysts prepared at higher pHs presented better electrochemical activity toward methanol oxidation. Humidified oxygen treatment of the PtRu/CNT led to improved activity of the catalysts toward methanol electro-oxidation, implying that Ru hydroxide is better than Ru as a co-catalyst. PtRu, PtOs, PtRuOs, and PtRuOsIr nanoparticles supported on CNTs with atomic ratios of Pt:Ru (tr:46), Pt:Os (80:20), Pt:Ru:Os (54:36:10), and Pt:Ru:Os:Ir (44:36:10:5) were prepared. Cyclic voltammetry for the methanol oxidation and CO stripping at the catalysts showed that PtRu/CNT and PtRuOsIr/CNT have the best performance toward methanol oxidation, PtRuOs/CNT has the lowest activity, but PtOs/CNT exhibits better catalytic activity only at potential or 0.73 V"--Abstract, leaf iii.
Modern Developments In Catalysis
DOWNLOAD
Author : Graham J Hutchings
language : en
Publisher: World Scientific
Release Date : 2016-11-14
Modern Developments In Catalysis written by Graham J Hutchings and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-14 with Science categories.
The UK Catalysis Hub is a consortium of universities working together on fundamental and applied research to find out how catalysts work and to improve their effectiveness. The contribution of catalysis to manufacturing contributes to almost 40% of global GDP, making development and innovation within the field integral to industry.Modern Developments in Catalysis provides a review of current research and practise on catalysis, focussing on five main themes: catalysis design, environmental catalysis, catalysis and energy, chemical transformation and biocatalysis and biotransformations. Topics range from complex reactions to the intricacies of catalyst preparation for supported nanoparticles, while chapters illustrate the challenges facing catalytic science and the directions in which the field is developing. Edited by leaders of the UK Hub, this book provides insight into one of the most important areas of modern chemistry — it represents a unique learning opportunity for students and professionals studying and working towards speeding-up, improving and increasing the rate of catalytic reactions in science and industry.
Polymers For Pem Fuel Cells
DOWNLOAD
Author : Hongting Pu
language : en
Publisher: John Wiley & Sons
Release Date : 2014-10-01
Polymers For Pem Fuel Cells written by Hongting Pu and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-01 with Technology & Engineering categories.
Including chemical, synthetic, and cross-disciplinary approaches; this book includes the necessary techniques and technologies to help readers better understand polymers for polymer electrolyte membrane (PEM) fuel cells. The methods in the book are essential to researchers and scientists in the field and will lead to further development in polymer and fuel cell technologies. • Provides complete, essential, and comprehensive overview of polymer applications for PEM fuel cells • Emphasizes state-of-the-art developments and methods, like PEMs for novel fuel cells and polymers for fuel cell catalysts • Includes detailed chapters on major topics, like PEM for direct liquid fuel cells and fluoropolymers and non-fluorinated polymers for PEM • Has relevance to a range of industries – like polymer engineering, materials, and green technology – involved with fuel cell technologies and R&D
Controlled Synthesis Of Pt Ni Bimetallic Catalysts And Study Of Their Catalytic Properties
DOWNLOAD
Author : Yuen Wu
language : en
Publisher: Springer
Release Date : 2016-05-14
Controlled Synthesis Of Pt Ni Bimetallic Catalysts And Study Of Their Catalytic Properties written by Yuen Wu and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-14 with Science categories.
This thesis focuses on the controlled synthesis of Pt–Ni bimetallic nanoparticles and the study of their catalytic properties. It discusses in detail the nucleation mechanism and the growth process of bimetallic systems, which is vital for a deeper understanding of the design of bimetallic catalysts. The author presents four pioneering studies: (1) syntheses of water-soluble octahedral, truncated octahedral, and cubic Pt–Ni nanocrystals and the study of their structure-activity relationship in model hydrogenation reactions; (2) a strategy for designing a concave Pt–Ni alloy using controllable chemical etching; (3) defect-dominated shape recovery of nanocrystals, which is a new synthesis strategy for trimetallic catalysts; (4) a sophisticated construction of Au islands on Pt−Ni, which is an ideal trimetallic nanoframe catalyst. This thesis inspires researchers working in materials, catalysis as well as other interdisciplinary areas.
Synthesis And Characterization Of Platinum Based Catalysts For Fuel Cells
DOWNLOAD
Author : Sonam Patel
language : en
Publisher:
Release Date : 2011
Synthesis And Characterization Of Platinum Based Catalysts For Fuel Cells written by Sonam Patel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Platinum (Pt) and platinum alloys have attracted wide attention as catalysts to attain high performance to increase the power density and reduce the component cost of polymer electrolyte membrane fuel cells (PEMFCs). Extensive research has been conducted in the areas of new alloy development and understanding of mechanisms of electrochemical oxygen reduction reaction (ORR). The durability of PEMFCs is also a major barrier to the commercialization of these fuel cells. Recent studies have suggested that potential cycling can gradually lead to loss of active surface area due to Pt dissolution and nanoparticle grain growth [1]. In this thesis we report a one-step synthesis of highly-dispersed Pt nanoparticles and Pt- Cobalt supported on Ketjen carbon black (20% Pt/C & 20% Pt3Co/C) as electro-catalysts for PEMFCs. Pt particles with size in the range of ~ 2.6nm (Pt/C) and 3.9 nm (Pt3Co/C) were obtained through adsorption on carbon supports and subsequently thermal decomposition of platinum acetylacetonate (Pt(acac)2). A comparative characterization analysis, including X-ray diffraction (XRD), high resolution transmission electron microscope (HR-TEM), FT-iR, EDAX, cyclic voltammetry (CV), and oxygen reduction reaction (ORR) activity, was performed on the synthesized and commercial (46.5wt% TKK) catalysts. The analysis was to reveal the Pt dispersion on the carbon support, particle size and distribution, electrochemical surface area (ECA), and ORR activities of these catalysts. It was found that the synthesized Pt/C showed similar particle size to that of the TKK catalysts (2.6nm and 2.7nm, respectively), but narrower particle size distribution; while the particle size for Pt3Co/C was found to be ~3.9 nm. Accelerated durability tests (ADT) under potential cycles were also performed for Pt/C and TKK to study the electrochemical degradation of the catalysts in corrosive environments. The ADTs revealed that the two catalysts (Pt/C & TKK) were comparable with respect to degradation in ECA and ORR activities. Initial electrochemical evaluation of Pt3Co/C was conducted, but durability studies were not attempted in this thesis due to its worse ORR kinetics than those of the Pt/C catalyst. From the experimental data, it was found that particle size impacted negatively the ECA and ORR activity of the catalysts.