Hollow metal composite phosphides derived from MOFs as highly efficient and durable bifunctional electrocatalysts for water splitting

Dang, Rui; Xie, Mengmeng; Li, Meixin; Xu, Xiufeng

doi:10.1039/d2nj05475b

Cited by 4 publications

(4 citation statements)

References 52 publications

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“…The XRD pattern (Figure i) of NFP reveals distinctive peaks at 40.79°, 44.64°, 47.44°, and 54.27 °Corresponding to the (111), (201), (210), and (300) crystal planes of Ni 2 P (JCPDS No. 03-0953). − Furthermore, the peaks at 31.22°, 35.65°, 40.14°, 44.33°, 47.26°, and 54.52 ° correspond to the (101), (200), (111), (201), (210), (211) crystal planes of Fe 2 P (JCPDS No. 27-1171), respectively. − EDS elemental mapping was conducted to delve deeper into the elemental distribution of the NFP, the results revealed a uniform distribution of the elements Fe, Ni, C, N, and P within the cubes (Figure j), and the presence of element C in it is due to the decomposition of CN – , which improves the electrical conductivity of the NFP .…”

Section: Resultsmentioning

confidence: 99%

“…03-0953). − Furthermore, the peaks at 31.22°, 35.65°, 40.14°, 44.33°, 47.26°, and 54.52 ° correspond to the (101), (200), (111), (201), (210), (211) crystal planes of Fe 2 P (JCPDS No. 27-1171), respectively. − EDS elemental mapping was conducted to delve deeper into the elemental distribution of the NFP, the results revealed a uniform distribution of the elements Fe, Ni, C, N, and P within the cubes (Figure j), and the presence of element C in it is due to the decomposition of CN – , which improves the electrical conductivity of the NFP . The specific surface area and pore structure of NiFe-PBA and NFP were calculated using the BET method (Figure S2a,b).…”

Section: Resultsmentioning

confidence: 99%

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Carbon-Based Porous Bimetallic Phosphide in CNT Network as a Separator for Li–S Batteries

Zhang,

Wei,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Lithium−sulfur (Li−S) batteries have received continuous attention due to their high theoretical specific capacity. However, the shuttle effect of lithium polysulfides (LiPSs) severely limits its development. Modification of commercial polypropylene (PP) separators is regarded as an effective strategy to suppress the shuttle effect. In this paper, NiFe-PBA-derived carbon-based porous bimetallic phosphide (NFP) was inserted into the carbon nanotube (CNT) networks, and these composites were utilized to modify the PP separator. CNT networks provide abundant pathways of electron transport to improve the conductivity of S cathode and Li 2 S. Ni 2 P and Fe 2 P in NFP exhibit robust chemisorption and catalytic effects on LiPSs. Moreover, porous structures and networks were beneficial for Li + immigration. The synergistic effects of NFP and CNT networks enable the modified separator to obtain a high electrical conductivity, superior adsorption capability, and enhanced catalytic performance. Assembled Li−S batteries show a high initial discharge specific capacity of 1244 mAh g −1 at 0.2 C. Notably, the highest discharge-specific capacity reached up to 938.9 mAh g −1 at 1 C, and the average capacity decay rate per cycle after 300 cycles was a mere 0.067%. This study paves the way for a robust research pathway in harnessing transition metal phosphides and carbon materials for modified separators, offering an effective strategy to realize high-performance Li−S batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Carbon-Based Porous Bimetallic Phosphide in CNT Network as a Separator for Li–S Batteries

Zhang,

Wei,

Liu

et al. 2024

ACS Appl. Nano Mater.

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“…However, it showed better OER efficiency with lower overpotential, small Tafel slope, and high stability. Beside this, the nanospindle catalyst displayed efficient HER activity with an overpotential of 376 mV and small Tafel slope and also facilitated the electrolyte-transfer process and improved the active sites . Based on MOFs’ unique properties, Fan et al synthesized 3D cadmium-based MOFs which showed both functions: electrocatalytic oxygen evolution in water-splitting reactions and photocatalytic elimination of organic contaminants.…”

Section: Insights On Mofs and Applicationsmentioning

confidence: 99%

“…91 Based on MOFs' unique properties, Fan et al synthesized 3D cadmium-based MOFs which showed both functions: electrocatalytic oxygen evolution in water-splitting reactions and photocatalytic elimination of organic contaminants. The synthesis of a series of cadmium-based MOFs such as [Cd(bimb) 2 (HITA) 2 ] n and [Cd(bimb) 4 (ONO 2 ) 2 ] n revealed that the former exhibits excellent performance in OER with a lower overpotential of 279 mV and a reduced Tafel slope.…”

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confidence: 99%

Nanoporous Metal/Covalent Organic Framework-Based Electrocatalysts for Water Splitting

Shah,

Iftikhar

2024

ACS Appl. Nano Mater.

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In today's technological era, the increased consumption of fossil fuels has taken a severe toll on the environment. In response to this, researchers are actively pursuing to develop efficient methods such as water splitting to obtain cleaner fuel and mitigate the adverse effects on the environment. However, the reactions involved in this process are sluggish. In order to enhance the reaction rate, scientists have been exploring efficient catalysts with long-term durability and stability and the ability to facilitate the kinetics of the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Furthermore, due to the instability, high cost, and scarcity of noble-metal-based catalysts, researchers have shifted their focus to nanoporous-based metal−organic framework (MOF) and covalent organic framework (COF) catalysts, which not only offer enhanced stability but also contribute to increased conductivity, a crucial factor for materials used in water-splitting processes. Certain MOFs have been found to surpass platinum-and iridium-based catalysts in water catalysis. COFs also enhance OER and HER kinetics due to their large surface area, porosity, and excellent electrical conductivity, establishing them as valuable electrocatalysts in diverse applications. This Review provides a comprehensive investigation of electrocatalysts based on MOFs and COFs, encompassing their classification and synthetic pathways, with a special emphasis on their HER/OER performance. It also delves into intricate aspects such as structure−property correlations and nanostructure engineering, offering a comprehensive understanding of these materials in the context of electrocatalysis. Moreover, some of these catalysts exhibit notable efficiency for OER while others demonstrate proficiency for HER, which showcases their versatile electrocatalytic capabilities. Additionally, this Review sheds light on the future challenges confronting water splitting and engages in a discourse on potential solutions.

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The Ni2+-LaNiO3/CdS hollow core–shell heterojunction towards enhanced visible light overall water splitting H2 evolution via HER/OER synergism of Ni2+/Ov

Que

Lü

et al. 2023

Chemical Engineering Journal

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Hollow metal composite phosphides derived from MOFs as highly efficient and durable bifunctional electrocatalysts for water splitting

Abstract: Explore efficient non-precious electrocatalysts with dual functionality for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution are critical and challenging. Herein, hollow Fe2P @...

Cited by 4 publications

References 52 publications

Carbon-Based Porous Bimetallic Phosphide in CNT Network as a Separator for Li–S Batteries

Carbon-Based Porous Bimetallic Phosphide in CNT Network as a Separator for Li–S Batteries

Nanoporous Metal/Covalent Organic Framework-Based Electrocatalysts for Water Splitting

The Ni2+-LaNiO3/CdS hollow core–shell heterojunction towards enhanced visible light overall water splitting H2 evolution via HER/OER synergism of Ni2+/Ov

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