Unveiling the synergistic catalysis essence of trimetallic Fe-Co-Ni phosphides for lithium–sulfur chemistry

Yang, Qin; Wei, Xiujuan; Cao, Xuebo; Chen, Le; Song, Lixian; Kong, Long; Sun, Wei; Xie, Kefeng; Song, Yingze

doi:10.1016/j.cej.2022.139638

Cited by 14 publications

(8 citation statements)

References 37 publications

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“…It is also sufficiently clear that the regulation or lack of regulation of reducing capacity will largely affect redox reactions. 39,40 3.3. Photocatalytic Selective Oxidation of sp 3 C−H Bonds.…”

Section: Photocatalytic Co 2 Reductionmentioning

confidence: 99%

Ultrathin Polymers with Tunable Band Structures Boosted Multi-Functional Photocatalysis under Visible Light Illumination

Huang,

Xu,

Song

et al. 2023

ACS Appl. Polym. Mater.

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Photocatalysts have unique valence bands and conduction bands, which can dominate the redox reaction in the same photocatalyst. Herein, ultrathin polymers are prepared by combining cyclotriphosphazene with pyrimidine via ether bonds. The redox ability of polymers varies with the reaction time. In the photocatalytic reaction, the CH 4 activity of the optimal sample (MBAP) is 39.5 times that of the worst sample (EBAP), and their selectivity is 100 and 24%, respectively. In sp 3 C−H bond activation, the yield of MBAP remained much better than that of EBAP. High reduction ability in photocatalysts plays an important role in both reduction and oxidation reactions. The intrinsic reason is that the high reduction capacity enhances the chance of photogenerated electrons to participate in the reduction reaction, thus accelerating the separation of photoinduced carriers, while the holes in the valence band can participate in the oxidation reaction only after the electrons are bound in the conduction band. This work offers a fresh viewpoint on how to create polymer photocatalysts with multiple applications.

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Section: Photocatalytic Co 2 Reductionmentioning

confidence: 99%

Ultrathin Polymers with Tunable Band Structures Boosted Multi-Functional Photocatalysis under Visible Light Illumination

Huang,

Xu,

Song

et al. 2023

ACS Appl. Polym. Mater.

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“…[8,33,39,40] Introducing catalytic hosts to accelerate the redox conversion of polysulfides has been shown to be a fundamental solution to resolve these issues. [9,[41][42][43][44][45] To date, a variety of electrocatalysts, including heteroatom-doped/defect-rich carbon materials, [26,38,17] metal sulfides, [46][47][48][49][50] metal oxides, [7,[51][52][53][54][55] metal nitrides, [56][57][58][59][60][61][62] metal phosphides [63][64][65][66][67] , and heterostructures, [6,[68][69][70][71] have been developed and utilized as sulfur hosts. In particular, numerous comprehensive reviews have summarized the progress of electrocatalysts from the viewpoint of microstructure and electronic structure regulation.…”

Section: Introductionmentioning

confidence: 99%

In Situ Reconstruction of Electrocatalysts for Lithium–Sulfur Batteries: Progress and Prospects

Zhang

Wang

et al. 2023

Adv Funct Materials

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The current research of Li–S batteries primarily focuses on increasing the catalytic activity of electrocatalysts to inhibit the polysulfide shuttling and enhance the redox kinetics. However, the stability of electrocatalysts is largely neglected, given the premise that they are stable over extended cycles. Notably, the reconstruction of electrocatalysts during the electrochemical reaction process has recently been proposed. Such in situ reconstruction process inevitably leads to varied electrocatalytic behaviors, such as catalytic sites, selectivity, activity, and amounts of catalytic sites. Therefore, a crucial prerequisite for the design of highly effective electrocatalysts for Li–S batteries is an in‐depth understanding of the variation of active sites and the influence factors for the in situ reconstruction behaviors, which has not achieved a fundamental understanding and summary. This review comprehensively summarizes the recent advances in understanding the reconstruction behaviors of different electrocatalysts for Li–S batteries during the electrochemical reaction process, mainly including metal nitrides, metal oxides, metal selenides, metal fluorides, metals/alloys, and metal sulfides. Moreover, the unexplored issues and major challenges of understanding the reconstruction chemistry are summarized and prospected. Based on this review, new perspectives are offered into the reconstruction and true active sites of electrocatalysts for Li–S batteries.

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“…Numerous theoretical strategies and experimental approaches can be used to optimize each part of the battery, including lithium negative, sulfur positive, electrolyte, and separator. Sulfur hosts or new binders have been extensively designed, including polar metal oxides, − phosphates, , sulfides, − and nitrogen-containing carbon-coated materials or individual conductive materials that are introduced. They are used to enhance the chemisorption of LIPSs.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Redox Kinetics of Dendrite-Free Lithium–Sulfur Battery by Bidirectional Catalysis of Cationic Dual-Active Sites

Feng

Wang

Wen

et al. 2023

ACS Sustainable Chem. Eng.

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The practical application of lithium–sulfur batteries (LSBs) is hampered by the slow lithium polysulfide (LIPS) conversion kinetics and the uncontrollable anode-metal lithium dendrites. Herein, a three-dimensional cation dual-active-site eggshell structure compound (3DCS-FMO@C) was synthesized by soft template, ion exchange, and pyrolysis to modify the commercial separator. Experimental and theoretical analysis results showed that Mn2+ and Fe2+ sites in 3DCS-FMO@C can synergistically adsorb LIPSs, effectively regulate the bidirectional conversion dynamics of intermediate liquid-phase LIPSs and solid-phase lithium sulfide, and reduce the energy barrier of the reaction. The 3DCS-FMO@C-modified separator with high mechanical stability and no reduction in ion diffusion also had a lithiophilic central core that can homogenize the lithium-ion flow, thereby inhibiting the dendrite growth of lithium. Based on the above advantages, 3DCS-FMO@C-modified separator LSBs had better electrochemical performance, including an initial capacity of 1530 mAh g–1 at 0.1C and an ultralow decay rate of 0.029% for 1000 cycles at 0.5C. A high area capacity of 8.7 mAh cm–2 was achieved even with high sulfur loading and poor electrolyte. This work provided a basis for understanding the bidirectional catalysis for practical application in LSBs and simultaneously solved the problem of lithium dendrites.

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Unveiling the synergistic catalysis essence of trimetallic Fe-Co-Ni phosphides for lithium–sulfur chemistry

Cited by 14 publications

References 37 publications

Ultrathin Polymers with Tunable Band Structures Boosted Multi-Functional Photocatalysis under Visible Light Illumination

Ultrathin Polymers with Tunable Band Structures Boosted Multi-Functional Photocatalysis under Visible Light Illumination

In Situ Reconstruction of Electrocatalysts for Lithium–Sulfur Batteries: Progress and Prospects

Improvement of Redox Kinetics of Dendrite-Free Lithium–Sulfur Battery by Bidirectional Catalysis of Cationic Dual-Active Sites

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