Enhancing hydrogen storage properties of MgH2 by core-shell CoNi@C

Zhao, Ying; Zhu, Yunfeng; Liu, Jiangchuan; Ma, Zhongliang; Zhang, Ji‐Guang; Liu, Yana; Li, Yanhao; Li, Liquan

doi:10.1016/j.jallcom.2020.158004

Cited by 40 publications

(12 citation statements)

References 48 publications

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“…Many forms of carbonaceous matrix have been employed: C-replica of mesoporous silica, C-NTs, C-foam, C-spheres, graphene, graphene oxide GO, reduced graphene oxide r-GO etc. (Table 2) [40,42,53,65,69,70,.…”

Section: Types Of Hosts Used As Hydride Matrixmentioning

confidence: 99%

“…The overall enhancement of kinetic and thermodynamic parameters can be tuned by utilization of catalysts. This is usually implemented to improve behavior of systems that already show promising results including recyclability (Table 9) [19,20,34,43,57,65,68,77,82,92,102,108,113,118,120,125,131,132,134,136,139,143,147,158,160,[166][167][168]172,[183][184][185][186][187][188][189][190][191][192]194,[196][197][198][199][200][201][202][203]…”

Section: (Nano)catalyst Additionmentioning

confidence: 99%

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Recent Development in Nanoconfined Hydrides for Energy Storage

Comănescu

2022

IJMS

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Hydrogen is the ultimate vector for a carbon-free, sustainable green-energy. While being the most promising candidate to serve this purpose, hydrogen inherits a series of characteristics making it particularly difficult to handle, store, transport and use in a safe manner. The researchers’ attention has thus shifted to storing hydrogen in its more manageable forms: the light metal hydrides and related derivatives (ammonia-borane, tetrahydridoborates/borohydrides, tetrahydridoaluminates/alanates or reactive hydride composites). Even then, the thermodynamic and kinetic behavior faces either too high energy barriers or sluggish kinetics (or both), and an efficient tool to overcome these issues is through nanoconfinement. Nanoconfined energy storage materials are the current state-of-the-art approach regarding hydrogen storage field, and the current review aims to summarize the most recent progress in this intriguing field. The latest reviews concerning H2 production and storage are discussed, and the shift from bulk to nanomaterials is described in the context of physical and chemical aspects of nanoconfinement effects in the obtained nanocomposites. The types of hosts used for hydrogen materials are divided in classes of substances, the mean of hydride inclusion in said hosts and the classes of hydrogen storage materials are presented with their most recent trends and future prospects.

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Section: Types Of Hosts Used As Hydride Matrixmentioning

confidence: 99%

Section: (Nano)catalyst Additionmentioning

confidence: 99%

Recent Development in Nanoconfined Hydrides for Energy Storage

Comănescu

2022

IJMS

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“…The catalytic mechanism was well explained in ref [116]; accordingly, the Mg 2 NiH 4 phase decomposes earlier than MgH 2 during the desorption process; the newly created Mg 2 Ni can assist the dehydrogenation of MgH 2 in a way that H atoms first diffuse to the Mg 2 Ni and then to the solid-gas interface. This mechanism is often referred to as a "hydrogen pump" [44,117,118], since the intermetallic phase acts as a diffusion channel for hydrogen and also serves as a heterogeneous nucleation site. It was also pointed out that the micro-strain associated with the volume change occurring during the Mg 2 Ni↔Mg 2 NiH 4 transformation is beneficial for the diffusion of H and, thus, the kinetic performance of the composite [110,119].…”

Section: Formation Of Catalysts During In Situ Reactionsmentioning

confidence: 99%

“…In terms of catalytic activity, they often surpass those additives that are not formed in situ, but only mixed with MgH 2 through ball milling. The reason behind this observation can have multiple origins: (i) the in situ formed phases have altered the electronic structure compared to the original additive [41,102,109,128], which could be beneficial to the interaction with hydrogen atoms/molecules; (ii) the small size and uniform distribution (which were observed in multiple cases [41,109,110,117,128]) are also an important feature for in situ generated catalysts, since more interphase regions and a larger surface area covered by these products lead to an enhanced overall catalytic activity.…”

Section: Formation Of Catalysts During In Situ Reactionsmentioning

confidence: 99%

Improved H-Storage Performance of Novel Mg-Based Nanocomposites Prepared by High-Energy Ball Milling: A Review

Révész

Gajdics

2021

Energies

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Hydrogen storage in magnesium-based composites has been an outstanding research area including a remarkable improvement of the H-sorption properties of this system in the last 5 years. Numerous additives of various morphologies have been applied with great success to accelerate the absorption/desorption reactions. Different combinations of catalysts and preparation conditions have also been explored to synthesize better hydrogen storing materials. At the same time, ball milling is still commonly and effectively applied for the fabrication of Mg-based alloys and composites in order to reduce the grain size to nanometric dimensions and to disperse the catalyst particles over the surface of the host material. In this review, we present the very recent progress, from 2016 to 2021, on catalyzing the hydrogen sorption of Mg-based materials by ball milling. The various catalyzing routes enhancing the hydrogenation performance, including in situ formation of catalysts and synergistic improvement achieved by using multiple additives, will also be summarized. At the end of this work, some thoughts on the prospects for future research will be highlighted.

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“…After dehydrogenation, 0.6 wt% H 2 was absorbed under 300 bar pressure at 300 • C temperature in 11 h by the dehydrogenated product. Zhao et al designed a catalyst containing core-shell structure CoNi@C via hydrothermal and calcination reduction to improve the catalytic activity of MgH 2 [159]. Prepared catalyst was found to efficiently desorb 5.83 wt% hydrogen within 1800 s started at 173 • C up to max 275 • C temperature and released 4.83 wt% H 2 within 1800 s at the lowest temperature 100 • C. Meng et al investigated the superiority of designed 3D flower-like TiO 2 @C nanostructured catalyst towards MgH 2 [160].…”

Section: D-block Ternary Metal Catalysts and Miscellaneous Catalystsmentioning

confidence: 99%

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

et al. 2021

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The goal of finding efficient and safe hydrogen storage material motivated researchers to develop several materials to fulfil the demand of the U.S. Department of Energy (DOE). In the past few years, several metal hydrides, complex hydrides such as borohydrides and alanates, have been researched and found efficient due to their high gravimetric and volumetric density. However, the development of these materials is still limited by their high thermodynamic stability and sluggish kinetics. One of the methods to improve the kinetics is to use catalysts. Among the known catalysts for this purpose, transition metals and their compounds are known as the leading contender. The present article reviews the d-block transition metals including Ni, Co, V, Ti, Fe and Nb as catalysts to boost up the kinetics of several hydride systems. Various binary and ternary metal oxides, halides and their combinations, porous structured hybrid designs and metal-based Mxenes have been discussed as catalysts to enhance the de/rehydrogenation kinetics and cycling performance of hydrogen storage systems.

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Enhancing hydrogen storage properties of MgH2 by core-shell CoNi@C

Cited by 40 publications

References 48 publications

Recent Development in Nanoconfined Hydrides for Energy Storage

Recent Development in Nanoconfined Hydrides for Energy Storage

Improved H-Storage Performance of Novel Mg-Based Nanocomposites Prepared by High-Energy Ball Milling: A Review

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

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