Catalysis and Downsizing in Mg-Based Hydrogen Storage Materials

Li, Jianding; Li, Bo; Shao, Huaiyu; Li, Wei; Lin, Huaijun

doi:10.3390/catal8020089

Cited by 59 publications

(30 citation statements)

References 92 publications

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“…Among numerous alternative energy, hydrogen has been deemed as one of the most important and ideal energy sources owing to its distinct merits, such as a high calorific value, non-toxic environmentally, sustainable and cost-effective [1][2][3][4]. As is known, a complete energy system that utilizes hydrogen as an energy source is composed of producing, storing, transporting and utilizing hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Palladium Supported on Carbon Nanotubes as a High-Performance Catalyst for the Dehydrogenation of Dodecahydro-N-ethylcarbazole

Zhu

Du³

et al. 2018

Catalysts

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Hydrogen storage in the form of liquid organic hydrides, especially N-ethylcarbazole, has been regarded as a promising technology for substituting traditional fossil fuels owing to its unique merits such as high volumetric, gravimetric hydrogen capacity and safe transportation. However, unsatisfactory dehydrogenation has impeded the widespread application of N-ethylcarbazole as ideal hydrogen storage materials in hydrogen energy. Therefore, designing catalysts with outstanding performance is of importance to address this problem. In the present work, for the first time, we have synthesized Pd nanoparticles immobilized on carbon nanotubes (Pd/CNTs) with different palladium loading through an alcohol reduction technique. A series of characterization technologies, such as X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectrometer (ICP-AES), X-ray photoelectron spectroscopy (XPS) and transmission electron spectroscopy (TEM) were adopted to systematically explore the structure, composition, surface properties and morphology of the catalysts. The results reveal that the Pd NPs with a mean diameter of 2.6 ± 0.6 nm could be dispersed uniformly on the surface of CNTs. Furthermore, Pd/CNTs with different Pd contents were applied in the hydrogen release of dodecahydro-N-ethylcarbazole. Among all of the catalysts tested, 3.0 wt% Pd/CNTs exhibited excellent catalytic performance with the conversion of 99.6% producing 5.8 wt% hydrogen at 533 K, low activation energy of 43.8 ± 0.2 kJ/mol and a high recycling stability (>96.4% conversion at 5th reuse).

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Section: Introductionmentioning

confidence: 99%

Palladium Supported on Carbon Nanotubes as a High-Performance Catalyst for the Dehydrogenation of Dodecahydro-N-ethylcarbazole

Zhu

Du³

et al. 2018

Catalysts

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“…Thus, Mg-based hydrogen storage materials are low-cost and have the potential for largescale production [14]. As clarified in the previous section, MgH 2 is an ionic compound, so it has a high formation enthalpy which is a thermodynamic problem hindering its practical application [15]. To gain an insight into the mechanism of de/rehydrogenation processes, we analyzed a series of steps including H 2 transport to the surface, H 2 dissociation, H chemisorption, surface-bulk migration, H diffusion, nucleation and growth of hydride/metal phases [16].…”

Section: Mg-based Hydrogen Storage Materialsmentioning

confidence: 99%

“…These thermodynamic and kinetic problems lead to a high operation temperature, impeding its practical application [11,16]. To overcome these defects, many strategies such as alloying, nanoscaling, and doping have been employed [2]. These techniques will be reviewed in detail in the section below.…”

Section: Mg-based Hydrogen Storage Materialsmentioning

confidence: 99%

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Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Huang

et al. 2019

Sci. China Mater.

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As typical high-capacity complex hydrides, lightweight hydrides have attracted intensive attention due to their high gravimetric and volumetric energy densities of hydrogen storage. However, lightweight hydrides also have high thermodynamic stability and poor kinetics, so they ususally require high hydrogen desorption temperature and show inferior reversibility under mild conditions. This review summarizes recent progresses on the endeavor of overcoming thermodynamic and kinetic challenges for Mg based hydrides, lightweight metal borohydrides and alanates. First, the current state, advantages and challenges for Mg-based hydrides and lightweight metal hydrides are introduced. Then, alloying, nanoscaling and appropriate doping techniques are demonstrated to decrease the hydrogen desorption temperature and promote the reversibility behavior in lightweight hydrides. Selected scaffolds materials, approaches for synthesis of nanoconfined systems and hydriding-dehydriding properties are reviewed. In addition, the evolution of various dopants and their effects on the hydrogen storage properties of lightweight hydrides are investigated, and the relevant catalytic mechanisms are summarized. Finally, the remaining challenges and the sustainable research efforts are discussed.

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“…In the hydrogen storage area, Mg-based materials are promising candidates due to the large abundant reserve in the crust, the light weight of Mg element, and high hydrogen storage capacity (7.6 wt % for Mg) [34][35][36]. However, the relatively higher hydrogen desorption enthalpy (74.6 kJ/mol, from Sandia National Lab database) becomes a restriction for the future application of Mg-based materials for hydrogen storage [35,37,38]. The story is totally different when Mg-based materials are applied to TES.…”

Section: Different Types Of Mg-based Materials For Thermal Energy Stomentioning

confidence: 99%

Mg-Based Hydrogen Absorbing Materials for Thermal Energy Storage—A Review

Li¹,

Li²,

Shao³

et al. 2018

Applied Sciences

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Utilization of renewable energy such as solar, wind, and geothermal power, appears to be the most promising solution for the development of sustainable energy systems without using fossil fuels. Energy storage, especially to store the energy from fluctuating power is quite vital for smoothing out energy demands with peak/off-peak hour fluctuations. Thermal energy is a potential candidate to serve as an energy reserve. However, currently the development of thermal energy storage (TES) by traditional physical means is restricted by the relatively low energy density, high temperature demand, and the great thermal energy loss during long-period storage. Chemical heat storage is one of the most promising alternatives for TES due to its high energy density, low energy loss, flexible temperature range, and excellent storage duration. A comprehensive review on the development of different types of Mg-based materials for chemical heat storage is presented here and the classic and state-of-the-art technologies are summarized. Some related chemical principles, as well as heat storage properties, are discussed in the context. Finally, some dominant factors of chemical heat storage materials are concluded and the perspective is proposed for the development of next-generation chemical heat storage technologies.

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Catalysis and Downsizing in Mg-Based Hydrogen Storage Materials

Cited by 59 publications

References 92 publications

Palladium Supported on Carbon Nanotubes as a High-Performance Catalyst for the Dehydrogenation of Dodecahydro-N-ethylcarbazole

Palladium Supported on Carbon Nanotubes as a High-Performance Catalyst for the Dehydrogenation of Dodecahydro-N-ethylcarbazole

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Mg-Based Hydrogen Absorbing Materials for Thermal Energy Storage—A Review

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