Catalytic Metal Foam by Chemical Melting and Sintering of Liquid Metal Nanoparticles

Allioux, François-Marie; Merhebi, Salma; Tang, Jianbo; Idrus-Saidi, Shuhada A.; Abbasi, Roozbeh; Saborío, Maricruz G.; Ghasemian, Mohammad B.; Han, Jialuo; Namivandi-Zangeneh, Rashin; O’Mullane, Anthony P.; Koshy, Pramod; Daiyan, Rahman; Amal, Rose; Boyer, Cyrille; Kalantar‐zadeh, Kourosh

doi:10.1002/adfm.201907879

Cited by 60 publications

(83 citation statements)

References 75 publications

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“…In addition, nickel foam has played an important role in this research. It can be seen that advanced foaming systems has important research value in different fields for future studies [46–48] …”

Section: Discussionmentioning

confidence: 99%

NiCoP/NF 1D/2D Biomimetic Architecture for Markedly Enhanced Overall Water Splitting

et al. 2021

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The construction of a well‐defined metal‐organic framework (MOF) precursor structure is essential to obtain highly efficient transition metal phosphide electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in water splitting. In this regard, we propose a novel strategy involving the in situ conversion of flake nickel‐cobalt hydroxide into NiCo MOF with a unique biomimetic architecture (i. e. Venus flytrap‐like morphology with dense 1D nanowires anchoring on 2D nanosheets), and further phosphating the precursor into NiCoP that possesses a similar, distinctive structure. Specifically, 1D nanowires afford effective electron transfer, while 2D nanosheets provide enhanced mechanical stability to the composite. The experimental results show that this material has an enormous amount of available active sites, accelerated charge/mass transfer, and a structural synergistic effect. As a result, the as‐prepared NiCoP/nickel foam (NF) catalyst only requires overpotentials of 78 and 262 mV to reach a current density of 10 mA cm−2 for the HER and OER in 1.0 M KOH, respectively. Furthermore, the application of NiCoP/NF as a bifunctional catalyst for the overall water splitting reaction yields current densities of 10 mA cm−2 at 1.60 V. Therefore, this is an effective strategy for the development of next‐generation electrocatalysts for solar‐energy conversion.

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Section: Discussionmentioning

confidence: 99%

NiCoP/NF 1D/2D Biomimetic Architecture for Markedly Enhanced Overall Water Splitting

et al. 2021

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“…Other metals that melt near room temperatures, such as bismuth-based alloys and lead-based alloys, have their own characteristics in thermotics, [173] printing technology, [163] low-dimensional material synthesis, [54,55] and surface catalysis, [174] respectively. Compared with gallium-based alloys, the melting points of these post-transition metals are still relatively high so that there is little difference from traditional metals, which means that oxidization is not distributed to the wetting characteristics of these alloys.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

Interfacial Engineering of Room Temperature Liquid Metals

Liu

Cui

et al. 2021

Adv Materials Inter

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and formed spontaneously and instantaneously upon exposure to atmospheric oxygen. [1-3] The thin film or "protective skin" covering the surface of RTLMs, generally dominated the physical properties and applications of the materials. This thin film is composed of a majority fraction of gallium oxides with a much smaller amount of indium and tin oxides. [4] When immersed in acidic or alkaline electrolytes, the oxidic films of RTLMs will be dissolved. [5-8] Due to the disorder of internal structure, the surface of the spherical liquid metal droplet is smooth and removable under the function of surface tension. [9,10] According to the size and structure of the solid substrate, the contact areas between the liquid metal and the solid substrate shows various wetting phenomena and corresponding application scenarios. [11-14] Surface chemical composition plays the primary role in dominating various phenomena and practical applications of RTLMs, which possessed the technologically important and scientifically interesting parameter. Gallium-based liquid metal is similar in structure to conventional solid metal, except for some covalent bonds inside, and the physicochemical properties have the commonality of both metallic solid and fluid properties. [15] The composition of gallium-based alloys can be assumed as made up of several atomic groups, within which the permutation of the solid remains, the binding energy between the liquid atoms remains strong, but the binding force between the groups was broken. The interface refers to the contact area between the different phases, which is the transition layer from one phase to another. The binding force of electrons that are relatively far away from the inner core is related to their energy, causing the interface behavior between different phases to be incompletely consistent. The surface is a type of interface, which specifically refers to the gas phase substance in interfacial behavior. In the processes of thermodynamics, [16,17] surface absorption, [18,19] controllable wetting, [6,13,20] material catalysis, [21,22] redox, and other physical and chemical reactions, [23,24] RTLMs inevitably contact with other substances with different phase states. Even the pure liquid metal would contact with oxygen in the air to yield a thin protective film. [17,25,26] Therefore, the investigation of interfacial behaviors between RTLMs and different surrounding mediums is helpful to renovate and broaden the understanding and applications of liquid metal. So far, there gradually appeared literature on phenomena and mechanism of the interfacial effect of RTLMs, such as synthesis of low-dimensional materials in the gas atmosphere, [27,28] Room temperature liquid metals (RTLMs), especially those made of galliumbased alloys belong to an emerging versatile material with fascinating characteristics derived from its simultaneous metallic and inherent fluidic natures. The interfacial effects of liquid metal involved in diverse surfaces thus play critical roles in explaining many fundamental phenomena....

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“…Sodium bicarbonate has also been used in order to blow metallic foams. Hence, Alioux et al 31 presented a process where sodium bicarbonate has been dispersed in a mixture of metallic nanoparticles and glycerol. The mixture was immersed in a hydrogen chlorine bath where the sodium hydrogen carbonate reacted with HCl in order to yield carbon dioxide, water and sodium chloride.…”

Section: A Sodium Bicarbonatementioning

confidence: 99%

From gas release to foam synthesis, the second breath of blowing agents

Coste

Négrell

Caillol

2020

European Polymer Journal

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The increasing concern about the environmental impact of physical blowing agents (PBAs) favours the use of chemical blowing agents (CBAs) to replace controversial PBAs. Blowing agents are key compounds in order to obtain polymer foams. Indeed, blowing agents are crucial additives that release gas needed to blow polymer foams. CBA compounds have been widely studied in recent decades, and today if new CBA are studied, one of the challenges remains to adapt the use of CBA to new polymers or new formulations. Only a handful of books present different CBAs commercially available but in these documents, the presentation of CBAs is not enough complete to understand potential or limits. Thus, our work is focused on the most common, both inorganic and organic chemical blowing agents and highlights the specifications of these CBAs, with their advantages and drawbacks, and finally presents promising perspectives.

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Catalytic Metal Foam by Chemical Melting and Sintering of Liquid Metal Nanoparticles

Cited by 60 publications

References 75 publications

NiCoP/NF 1D/2D Biomimetic Architecture for Markedly Enhanced Overall Water Splitting

NiCoP/NF 1D/2D Biomimetic Architecture for Markedly Enhanced Overall Water Splitting

Interfacial Engineering of Room Temperature Liquid Metals

From gas release to foam synthesis, the second breath of blowing agents

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