Author: Kavitha ChennuruPublisher:
ISBN:
Category : Fuel cells
Languages : en
Pages : 158
Book Description
Novel Non-noble Metal Catalysts for Fuel Cells
Author: Kavitha ChennuruPublisher:
ISBN:
Category : Fuel cells
Languages : en
Pages : 158
Book Description
Non-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.
PROSPECTS FOR THE DEVELOPMENT OF NON-NOBLE METAL CATALYSTS FOR HYDROGEN-AIR FUEL CELLS.
Author: P. N. RossAdvanced Electrocatalysts for Low-Temperature Fuel Cells
Author: Francisco Javier Rodríguez-VarelaPublisher: Springer
ISBN: 3319990195
Category : Science
Languages : en
Pages : 302
Book Description
This book introduces the reader to the state of the art in nanostructured anode and cathode electrocatalysts for low-temperature acid and alkaline fuel cells. It explores the electrocatalysis of anode (oxidation of organic molecules) and cathode (oxygen reduction) reactions. It also offers insights into metal-carbon interactions, correlating them with the catalytic activity of the electrochemical reactions. The book explores the electrocatalytic behaviour of materials based on noble metals and their alloys, as well as metal-metal oxides and metal-free nanostructures. It also discusses the surface and structural modification of carbon supports to enhance the catalytic activity of electrocatalysts for fuel-cell reactions.
Electrocatalysts for Low Temperature Fuel Cells
Author: Thandavarayan MaiyalaganPublisher: John Wiley & Sons
ISBN: 3527803890
Category : Technology & Engineering
Languages : en
Pages : 618
Book Description
Meeting the need for a text on solutions to conditions which have so far been a drawback for this important and trend-setting technology, this monograph places special emphasis on novel, alternative catalysts of low temperature fuel cells. Comprehensive in its coverage, the text discusses not only the electrochemical, mechanistic, and material scientific background, but also provides extensive chapters on the design and fabrication of electrocatalysts. A valuable resource aimed at multidisciplinary audiences in the fields of academia and industry.
Novel Non-Precious Metal Electrocatalysts for Oxygen Electrode Reactions
Author: Hui YangPublisher: MDPI
ISBN: 303921540X
Category : Science
Languages : en
Pages : 190
Book Description
Research on alternative energy harvesting technologies, conversion and storage systems with high efficiency, cost-effective and environmentally friendly systems, such as fuel cells, rechargeable metal-air batteries, unitized regenerative cells, and water electrolyzers has been stimulated by the global demand on energy. The conversion between oxygen and water plays a key step in the development of oxygen electrodes: oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), processes activated mostly by precious metals, like platinum. Their scarcity, their prohibitive cost, and declining activity greatly hamper large-scale applications. This issue reports on novel non-precious metal electrocatalysts based on the innovative design in chemical compositions, structure, and morphology, and supports for the oxygen reaction.
Synthesis and Characterization of Novel Non Noble Metal Catalysts for the Electrocatalytic Oxygen Reduction Reaction
Author: Fuel Cells: Technologies for Fuel Processing
Author: Dushyant ShekhawatPublisher: Elsevier
ISBN: 0444535640
Category : Technology & Engineering
Languages : en
Pages : 569
Book Description
Fuel Cells: Technologies for Fuel Processing provides an overview of the most important aspects of fuel reforming to the generally interested reader, researcher, technologist, teacher, student, or engineer. The topics covered include all aspects of fuel reforming: fundamental chemistry, different modes of reforming, catalysts, catalyst deactivation, fuel desulfurization, reaction engineering, novel reforming concepts, thermodynamics, heat and mass transfer issues, system design, and recent research and development. While no attempt is made to describe the fuel cell itself, there is sufficient description of the fuel cell to show how it affects the fuel reformer. By focusing on the fundamentals, this book aims to be a source of information now and in the future. By avoiding time-sensitive information/analysis (e.g., economics) it serves as a single source of information for scientists and engineers in fuel processing technology. The material is presented in such a way that this book will serve as a reference for graduate level courses, fuel cell developers, and fuel cell researchers. Chapters written by experts in each area Extensive bibliography supporting each chapter Detailed index Up-to-date diagrams and full colour illustrations
Development of Novel Non-Pt Group Metal Electrocatalysts for PEM Fuel Cell Applications
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 89
Book Description
The objective of this multi-institutional effort was to comprehensively pursue the goal of eliminating noble metal (Pt group metals, PGM) from the cathodic oxygen reduction reaction (ORR) electrode thereby providing a quantum leap in lowering the overall PGM loading in a polymer electrolyte fuel cell (PEMFC). The overall project scope encompassed (a) comprehensive materials discovery effort, (b) a concomitant effort to scale up these materials with very high (±5%) reproducibility, both intra and inter, (c) understanding mass transport in porous medium both in gas diffusion and micro-porous layers for enhanced areal activity, (d) understanding mechanistic aspects of active site structure and ORR electrocatalytic pathway. Overall project milestones and metrics were (a) first phase effort based on performance in oxygen where the project's Go/No-Go decision point milestone of 100 mA/cm2 at 0.8 V (internal resistance-free, iR-free) at 80°C, pure H2/O2, with 1.5 bar total pressure was met. Subsequently, the principle objectives were to (a) transition the project from H2/O2 to H2/Air with slated target of exceeding 30 mA/cm2 @ 0.8 V, 2.5 bar total pressure and an end of the project target of 1 A/cm2 @ 0.4 V (same total pressure), both under 100% relative humidity. The target for catalyst material scale up was to achieve 100 g batch size at the end of the program. This scale up target had a quality control milestone of less than 5% variation of activity measured with H2/Air (2.5 bar total pressure) at 0.8 V. In addition, the project also aimed at arriving at a unified understanding of the nature of active sites in these catalysts as well as some preliminary understanding of the mechanistic pathway. Also addressed is the development of an integrated method for determination of mass transport parameters using a combination of Helox experiments and modeling of the gas diffusion media, especially the micro-porous layer on the gas diffusion electrode (GDE). Detailed aspects of technical metrics and milestones are provided in Table 1 of the final report. Besides the success in meeting the DOE milestones in areal activities for oxygen and air described above one of the key successes of this effort was in understanding the nature of the active site(s) and aspects of the ORR pathway. In this it should be noted that the materials discovery effort provided for use of unconventional approaches, some of which led to very active catalysts. This aspect is described in detail in the final report. From a mechanistic perspective, a combination spectroscopic techniques confirmed that the high activity observed for most pyrolyzed Fe-based catalysts, irrespective of the precursors materials (macrocycles or individual Fe, N, and C precursors), the synthesis method (wet chemical impregnation or SSM), and final Fe-species (with or without inorganic iron species), can mainly be attributed to a single active site: non-planar Fe-N4 moiety embedded in distorted carbon matrix characterized by a high potential for the Fe2+/3+ redox transition in acidic electrolyte/environment, which is likely formed via the covalent incorporation of distorted Fe-N4 moieties in the defective centers on the carbon basal plane or in armchair edges of two adjacent graphene layers. This Fe2+-N4 active site at 0.3 V undergoes redox transition to a pentacoordinate HOFe3+−N4 at 0.90 V, and the adsorption of the *OH trigged by the Fe2+/Fe3+ redox transition poisons the active sites, thereby providing experimental evidence of the redox mechanism. Moreover, a highly active MOF-based catalyst devoid of any Fe-N moieties was also developed, and the active sites were identified as nitrogen-doped carbon fibers with embedded iron particles that are not directly involved in the oxygen reduction pathway. The h ...