Author: P. N. RossPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
PROSPECTS FOR THE DEVELOPMENT OF NON-NOBLE METAL CATALYSTS FOR HYDROGEN-AIR FUEL CELLS.
Author: P. N. RossNon-Noble Metal Fuel Cell Catalysts
Author: Zhongwei ChenPublisher: John Wiley & Sons
ISBN: 3527664920
Category : Technology & Engineering
Languages : en
Pages : 448
Book Description
Written and edited by top fuel cell catalyst scientists and engineers from both industry and academia, this is the first book to provide a complete overview of this hot topic. It covers the synthesis, characterization, activity validation and modeling of different non-noble metal electrocatalysts, as well as their integration into fuel cells and their performance validation, while also discussing those factors that will drive fuel cell commercialization. With its well-structured approach, this is a must-have for researchers working on the topic, and an equally valuable companion for newcomers to the field.
Electrocatalysts for Fuel Cells and Hydrogen Evolution
Author: Abhijit RayPublisher: BoD – Books on Demand
ISBN: 1789848121
Category : Science
Languages : en
Pages : 130
Book Description
The book starts with a theoretical understanding of electrocatalysis in the framework of density functional theory followed by a vivid review of oxygen reduction reactions. A special emphasis has been placed on electrocatalysts for a proton-exchange membrane-based fuel cell where graphene with noble metal dispersion plays a significant role in electron transfer at thermodynamically favourable conditions. The latter part of the book deals with two 2D materials with high economic viability and process ability and MoS2 and WS2 for their prospects in water-splitting from renewable energy.
Scientific and Technical Aerospace Reports
Author: Energy Research Abstracts
Author: Novel Non-noble Metal Catalysts for Fuel Cells
Author: Kavitha ChennuruPublisher:
ISBN:
Category : Fuel cells
Languages : en
Pages : 158
Book Description
Fossil Energy Update
Author: Development of Non-precious Metal Catalysts for the Oxygen Reduction Reaction
Author: Melissa Ellen KreiderPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Eliminating greenhouse gas emissions to mitigate the effects of climate change is a global imperative. To achieve this goal, the world's dependence on fossil fuels must be ended and renewable energy technologies must be developed and deployed on a massive scale. The electrocatalytic oxygen reduction reaction (ORR) is an important limiting step in several promising technologies, including fuel cells, metal-air batteries, and the sustainable synthesis of hydrogen peroxide. Polymer electrolyte membrane fuel cells (PEMFCs) are a clean and efficient technology for converting chemical energy, e.g. in the form of hydrogen fuel, into electrical energy for transportation and backup power generation. The majority of the efficiency losses in a PEMFC are due to the sluggish kinetics of the ORR, requiring significant loadings of platinum-based catalysts at the cathode. The scarcity and high cost of platinum is therefore a limiting factor for the widespread development of PEMFC technologies. In this dissertation, we develop several low-cost, non-precious metal ORR catalysts for acidic and alkaline media, as well as techniques for understanding the relationship between performance and material properties. First, we investigate the performance of a thin film, carbon-free nickel nitride catalyst, finding substantial ORR activity in acidic and alkaline media. We identify significant surface oxidation with testing and air exposure. Utilizing electrochemical cycling and stability testing informed by Pourbaix diagrams, the role of surface oxidation in determining catalyst activity and stability is explored. This work demonstrates the importance of understanding material surface properties and stability. We next use a molybdenum (oxy)nitride thin film system to probe the role of structure and composition in ORR performance in acidic conditions. Using extensive materials characterization, the depth-dependent structure and composition of the films are determined, discovering the high O content in the bulk of films with a highly-defected structure. This bulk O content is found to be the strongest predictor of ORR activity. We use in situ characterization techniques to understand the material changes that occur during reaction, particularly those associated with potential-dependent catalytic behavior, finding that the catalyst surface undergoes distortion, amorphization, and O incorporation. We identify a potential window in which the intrinsic catalytic activity can be enhanced without the roughening or dissolution that lead to instability. This work demonstrates how ex situ and in situ techniques can be used to develop a rigorous understanding of a catalyst material, which can then be leveraged to optimize catalyst performance. Finally, we explore corrosion-resistant, conductive antimonates as a framework for enhancing the activity and stability of transition metal active sites. The antimonates are found to have superior intrinsic activity on a TM mass basis relative to the comparable oxides in alkaline electrolyte. Strategies for improving catalyst performance including electrode engineering and doping are investigated. Validating a theoretical prediction, a Mn-Cr antimonate solid solution is found to have enhanced mass activity compared to the pure Mn antimonate (on a TM basis). Further modifications of the antimonate framework are discussed, as well as strategies for materials discovery and development. In summary, this thesis addresses the challenge of PEMFC catalyst cost and performance through the discovery and development of non-precious metal ORR catalysts. Utilizing thorough materials and electrochemical characterization, we aim to develop fundamental understanding of these catalysts and strategies for improving their performance. For the ORR and beyond, this work demonstrates approaches to materials discovery and development that will be needed to advance and commercialize a wide variety of renewable energy technologies.
Noble-metal-free Electrocatalysts For Hydrogen Energy
Author: Qingsheng GaoPublisher: World Scientific
ISBN: 1800611587
Category : Science
Languages : en
Pages : 606
Book Description
With interdisciplinary perspectives from internationally renowned experts, Noble-Metal-Free Electrocatalysts for Hydrogen Energy is one of the most authoritative references to focus solely on state-of-the-art knowledge of noble-metal-free electrocatalysts, as well as their nanostructures and unique properties. The chapters within contain cutting-edge breakthroughs, horizons, and insights into functional materials for energy applications.This book contains over 3000 references and 200 figures, and is a highly valuable resource for scientists, students, and engineers working in the fields of electrochemistry, catalysis, fuel cells, batteries, and supercapacitors.
Electrocatalysis for Membrane Fuel Cells
Author: Nicolas Alonso-VantePublisher: John Wiley & Sons
ISBN: 3527830561
Category : Technology & Engineering
Languages : en
Pages : 581
Book Description
Electrocatalysis for Membrane Fuel Cells Comprehensive resource covering hydrogen oxidation reaction, oxygen reduction reaction, classes of electrocatalytic materials, and characterization methods Electrocatalysis for Membrane Fuel Cells focuses on all aspects of electrocatalysis for energy applications, covering perspectives as well as the low-temperature fuel systems principles, with main emphasis on hydrogen oxidation reaction (HOR) and the oxygen reduction reaction (ORR). Following an introduction to basic principles of electrochemistry for electrocatalysis with attention to the methods to obtain the parameters crucial to characterize these systems, Electrocatalysis for Membrane Fuel Cells covers sample topics such as: Electrocatalytic materials and electrode configurations, including precious versus non-precious metal centers, stability and the role of supports for catalytic nano-objects; Fundamentals on characterization techniques of materials and the various classes of electrocatalytic materials; Theoretical explanations of materials and systems using both Density Functional Theory (DFT) and molecular modelling; Principles and methods in the analysis of fuel cells systems, fuel cells integration and subsystem design. Electrocatalysis for Membrane Fuel Cells quickly and efficiently introduces the field of electrochemistry, along with synthesis and testing in prototypes of materials, to researchers and professionals interested in renewable energy and electrocatalysis for chemical energy conversion.