Stuart Martin Holmes

Electrosynthesis of ethylene from syngas

Feng Li, Zunmin Guo, Yu Yan, Qiyou Wang et autres

ca, gb, au, nz (code pays fourni par la source)

Enhanced Electrochemical Performance via GO-APTS / Nafion Membranes for PEM Fuel Cells and Vanadium Redox Flow Batteries

María Pérez-Page, Andres Parra-Puerta, Elliot Craddock, Stuart Martin Holmes

Nafion®, is a widely used ion-exchange membrane in PEM Fuel Cells (PEMFCs) and Vanadium Redox Flow Batteries (VRFBs). This polymer offers high proton conductivity but suffers from limitations, including vanadium ion crossover in VRFBs and decreased performance under low humidity in PEMFCs. …

gb, es (code pays fourni par la source)

Improving Interlayer Interactions in Proton Exchange Membrane Fuel Cell through Carbon Nanotube‐Based Catalyst Design

Ling Ai, Zhen Xu, Stuart Martin Holmes, Heng Zhai

Proton exchange membrane fuel cells (PEMFCs) have gained significant attention due to their efficient use of hydrogen energy, high energy density, and zero emissions, making them ideal for future transportation and portable energy frameworks. Despite these advantages, challenges related to catalyst layer …

gb (code pays fourni par la source)

High-Efficiency, Lightweight, and Reliable Integrated Structures—The Future of Fuel Cells and Electrolyzers

Yanyan Wang, Conggan Ma, Zhaojie Shen, Yitao Shen et autres

The high efficiency, light weight, and reliability of hydrogen energy electrochemical equipment are among the future development directions. Membrane electrode assemblies (MEAs) and electrolyzers, as key components, have structures and strengths that determine the efficiency of their power generation and the hydrogen …

cn, gb (code pays fourni par la source)

Nanofiber membranes for enhanced performance and optimization of proton exchange membrane fuel cells

Heng Zhai, Jianuo Chen, Meng Chen, Xiaocheng Yang et autres

Proton exchange membranes (PEMs) are critical to fuel cell performance, where ion transport, catalyst activity, and mass transfer determine efficiency and durability. However, conventional membranes in PEM fuel cells often suffer from hydrogen crossover, limited conductivity, and poor interfacial stability. To address …

gb (code pays fourni par la source)

Correlating Structural Variation with Catalytic Performance of Hierarchical Zeolites Using Ultra‐High‐Field Solid‐State NMR

Zhipeng Qie, Joseph Hurd, Noemi Linares, Xiaoxia Ou et autres

Abstract Ultra‐high‐field solid‐state NMR spectroscopy (1.0 GHz, 23.5 T) was employed to reveal the structural evolution of aluminum species and thus their correlations to catalytic cracking performance of Y zeolites after post‐synthetic treatments. Microwave‐assisted treatments, including chelating dealumination and NH4OH treatment, induced …

gb, cn, es (code pays fourni par la source)

Enhanced water management using Nafion matrix mixed membranes to improve PEM fuel cell performance by the incorporation of covalent functionalized electrochemical exfoliated graphene oxide

Andrés Parra-Puerto, Javier Rubio‐García, Jose Luque Allede, Elliot Craddock et autres

Description. The incorporation of functionalized EGO-APTS as filler enhances Nafion membrane hydrophilicity, improving the water management and boosting the fuel cell performance over 190% at 70% RH incorporation with the benchmark membrane, while reducing ohmic resistance and overall cost . Hydrophilicity is …

es, gb, vg (code pays fourni par la source)

Decoupling Membrane Electrode Assembly Materials Complexity from Fuel Cell Performance through Image‐Based Multiphase and Multiphysics Modelling

Jianuo Chen, Wenjia Du, Zunmin Guo, Xuekun Lu et autres

Abstract Proton exchange membrane fuel cells (PEMFCs) are important clean energy technology, yet the material and structural complexity of their membrane electrode assemblies (MEAs) can hamper the development of next‐generation structures, as even a subtle change to one component can have a …

gb, ca, fr (code pays fourni par la source)

Durable Proton Exchange Membrane Based on Polymers of Intrinsic Microporosity for Fuel Cells

Xiaocheng Yang, Zhiming Feng, Mustafa Alshurafa, Ming Guang Yu et autres

Abstract High‐temperature proton exchange membrane fuel cells (HT‐PEMFCs) is regarded as a promising energy conversion system owing to simplified water management and enhanced tolerance to fuel impurities. However, phosphoric acid (PA) leaching remains a critical issue, diminishing energy density and durability, posing …

gb, au (code pays fourni par la source)

Crystalline, Magnetic and Optical Properties of the CaLaSnFeO6 Perovskite

X. A. Velásquez Moya, James C. Fajardo, S. G. Posada Barragán, Sandra Peña et autres

Abstract In order to obtain new materials with multifunctional properties, CaLaSnFeO6 samples were synthesized by the solid reaction technique. Structural analysis was performed by X-ray diffraction technique. Rietveld refinement of the experimental data revealed that these materials crystallize in a perovskite-type monoclinic …

co, pe, gb (code pays fourni par la source)

Synthesis of zeolites from different kaolin deposits worldwide

Abdulsalami Sanni Kovo, Stuart Martin Holmes, Carlos A. Ríos, Abdulrazak Jinadu Otaru et autres

Nigéria, gb, co, sa (code pays fourni par la source)

Laser scribed proton exchange membranes for enhanced fuel cell performance and stability

Jianuo Chen, Xuekun Lu, Lingtao Wang, Wenjia Du et autres

High-temperature proton exchange membrane fuel cells (HT-PEMFCs) offer solutions to challenges intrinsic to low-temperature PEMFCs, such as complex water management, fuel inflexibility, and thermal integration. However, they are hindered by phosphoric acid (PA) leaching and catalyst migration, which destabilize the critical three-phase …

gb (code pays fourni par la source)