A Polymer Sheet‐Based Hydrogen Carrier

Oka, Kouki; Kaiwa, Yusuke; Kataoka, Miho; Fujita, Ken‐ichi; Oyaizu, Kenichi

doi:10.1002/ejoc.202001004

Cited by 10 publications

(9 citation statements)

References 46 publications

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“…Ir catalyst ligands were modified to enable both fluorenone hydrogenation using ambient hydrogen gas and dehydrogenation under milder conditions, as observed for the Ir complex with the dimethylamino-substituted bipyridine ligand, for instance. 126 The Ir catalyst facilitated almost 100% reversible hydrogenation under mild conditions: the fluorenone sites of the polymer were hydrogenated under 1 atm of hydrogen at room temperature for 1 h, while hydrogen was released from fluorenol sites at 95 °C over 4 h (entry 1 in Table 2).…”

Section: Hydrogen-carrying Redox Polymersmentioning

confidence: 99%

Organic redox polymers as electrochemical energy materials

Nishide

2022

Green Chem.

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Section: Hydrogen-carrying Redox Polymersmentioning

confidence: 99%

Organic redox polymers as electrochemical energy materials

Nishide

2022

Green Chem.

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“…The poly(3-buten-2-ol) had a lower activation energy of dehydrogenation than the fluorenol polymer (37.0 kJ/mol). However, the standard reaction enthalpy for dehydrogenation of this polymer was larger than that of the polyfluorenol (ΔH o = +54.9 kJ/mol) [ 47 ]. Recently, acetone-substituted poly(allylamine) was investigated as a hydrophilic solid-state hydrogen carrier with a maximum hydrogen storage capacity of 1.5 wt%.…”

Section: Absorption-based H 2 Storage Systemsmentioning

confidence: 99%

A Bird’s-Eye View on Polymer-Based Hydrogen Carriers for Mobile Applications

Sharifian¹,

Kern²,

Rieß³

2022

Polymers

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Globally, reducing CO2 emissions is an urgent priority. The hydrogen economy is a system that offers long-term solutions for a secure energy future and the CO2 crisis. From hydrogen production to consumption, storing systems are the foundation of a viable hydrogen economy. Each step has been the topic of intense research for decades; however, the development of a viable, safe, and efficient strategy for the storage of hydrogen remains the most challenging one. Storing hydrogen in polymer-based carriers can realize a more compact and much safer approach that does not require high pressure and cryogenic temperature, with the potential to reach the targets determined by the United States Department of Energy. This review highlights an outline of the major polymeric material groups that are capable of storing and releasing hydrogen reversibly. According to the hydrogen storage results, there is no optimal hydrogen storage system for all stationary and automotive applications so far. Additionally, a comparison is made between different polymeric carriers and relevant solid-state hydrogen carriers to better understand the amount of hydrogen that can be stored and released realistically.

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“…Recently, we reported hydrogen storage using alcohol/ketone‐substituted polymers by means of a hydrogenation/dehydrogenation cycle 19–22 . These polymers act as highly safe hydrogen carriers and have inherent advantages such as moldability and ease of handling.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic isopropanol/acetone‐substituted polymers for safe hydrogen storage

Oka

Tobita

Kataoka

et al. 2021

Polymer International

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The development of hydrogen carriers that are free from safety risks such as explosivity, volatility and toxicity is essential for safe hydrogen storage. In this study, we synthesize a safe and hydrophilic isopropanol/acetone‐substituted polymeric hydrogen carrier by a facile synthetic procedure that is conducted in water and only requires dialysis with water for purification. A simple nucleophilic substitution of poly(allylamine) and 2‐bromoacetone produces a hydrophilic acetone‐substituted poly(allylamine) derivative, facilitating control over the hydrophilicity of the polymer according to the degree of substitution. The polymer is readily hydrogenated using NaBH4 to obtain a hydrophilic isopropanol‐substituted poly(allylamine). The high density of the repeating units and high hydrophilicity of the amine groups enable the maximization of the mass hydrogen storage density of the redox polymer to ca 1.5 wt%. Reversible hydrogen gas fixation/release from the polymeric hydrogels via chemical bond formation/disconnection is realized with complete conversion, with dehydrogenation occurring at 65–95 °C in the presence of an iridium complex catalyst. © 2021 Society of Industrial Chemistry.

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A Polymer Sheet‐Based Hydrogen Carrier

Cited by 10 publications

References 46 publications

Organic redox polymers as electrochemical energy materials

Organic redox polymers as electrochemical energy materials

A Bird’s-Eye View on Polymer-Based Hydrogen Carriers for Mobile Applications

Hydrophilic isopropanol/acetone‐substituted polymers for safe hydrogen storage

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