Atomically miniaturized bi-phase IrOx/Ir catalysts loaded on N-doped carbon nanotubes for high-performance Li–CO2 batteries

Rho, Yeo-Jin; Kim, Boran; Shin, Kihyun; Henkelman, Graeme; Ryu, Won‐Hee

doi:10.1039/d2ta02234f

Cited by 24 publications

(15 citation statements)

References 76 publications

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“…The relatively high nucleation overpotential are mainly correlated with the low loading of SnCu 1.5 O 3.5 clusters and inferior conductivity of the MFI zeolites support. [ 45–48 ] In this study, the actual contents of Sn and Cu in the SnCu 1.5 O 3.5 @MFI composites were estimated to be 0.225 and 0.198 wt% with ICP‐MS method, respectively (Table S1, Supporting Information). Nevertheless, the SnCu 1.5 O 3.5 @MFI catalyst presents an impressive bifunctional catalytic activity for the formation and decomposition of Li 2 CO 3 /C for Li‐CO 2 batteries in a wide current density range.…”

Section: Resultsmentioning

confidence: 95%

Confinement of SnCu_xO₂₊_x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Zhu

Yang

et al. 2023

Advanced Energy Materials

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Electrochemical reduction of carbon dioxide (CO2RR) to methane has achieved impressive Faradaic efficiencies of over 40% with copper‐based catalysts including Cu2O, copper‐silver alloys and others. Although copper‐based catalysts work effectively in the CO2RR, they suffer from a major disadvantage: low selectivity of desired products due to the difficulty of regulating the intermediate coverage on the catalyst surface. Here, this work presents new SnCuxO2+x nanocluster electrocatalysts encapsulated in purely siliceous MFI zeolites (coded as SnCuxO2+x@MFI) for a high‐efficient CO2RR. This allows the formation of *CO intermediates in the channels of zeolites, which further undergoes a multi‐step protonation process to generate methane, a very attractive feature for Li‐CO2 batteries that use the CO2RR catalyst as the cathode. The obtained SnCu1.5O3.5@MFI catalyst possesses a desired catalytic performance with the Faradaic efficiency of CO2 reduction to methane at 66.6 ± 3.2% in a 0.1 m KHCO3 electrolyte. Using the SnCu1.5O3.5@MFI as a cathode within a Li‐CO2 battery, this work achieves a full discharge specific capacity of 23 000 mAh g−1 at a cut‐off voltage of 2.0 V (vs Li+/Li) and an operational life over 100 cycles at 1000 mAh g−1 cutoff specific capacity. This novel confinement catalyst offers a viable pathway to develop efficient CO2RR and Li‐CO2 batteries with attractive properties for practical applications.

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Section: Resultsmentioning

confidence: 95%

Confinement of SnCu_xO₂₊_x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Zhu

Yang

et al. 2023

Advanced Energy Materials

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“…(F) Performance comparisons with reported carbon and noble metal‐based (Ru, Rh, Ir, etc.) cathode catalysts for Li–CO 2 batteries 1,2,6,10,12–14,30–71 (the number on the top of each cylinder means various cathode catalysts, and the corresponding cathode catalysts from 1 to 49 are listed in Table S1 in detail).…”

Section: Resultsmentioning

confidence: 99%

Freestanding Mo₃N₂ nanotubes for long‐term stabilized 2e⁻ intermediate‐based high energy efficiency Li–CO₂ batteries

Zhang

Cheng

et al. 2023

SusMat

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Li-CO 2 batteries are considered one of the promising power sources owing to ultrahigh energy density and carbon fixation. Nevertheless, the sluggish reaction kinetics of 4e − discharged process (Li 2 CO 3 ) impede its potential application. One of the efficient strategies for developing cathode catalysts is to stabilize 2e − intermediate Li 2 C 2 O 4 and improve reaction reversibility. However, longterm catalysts of stabilized Li 2 C 2 O 4 are barely achieved, whereas cycle stability is far from satisfactory level. Herein, non-noble metal-based Mo 3 N 2 is synthesized and employed as freestanding cathodes for Li-CO 2 batteries. Owing to rich delocalized electrons of Mo 2+ and reversible electron localization structure, freestanding Mo 3 N 2 cathodes exhibit a low charge potential (3.28 V) with an ultralow potential gap (0.64 V), high energy efficiency of up to 80.46%, fast rate capability, and outstanding cycle stability (>910 h). In situ experiments and theoretical calculation verify that Mo 3 N 2 stabilizes 2e − Li 2 C 2 O 4 intermediate by the interaction of Mo 2+ as active sites where Mo 2+ promotes the transfer of outer electrons to O, prevents its disproportionation to Li 2 CO 3 , and promotes reaction kinetics, contributing to high energy efficiency and outstanding cycle reversibility. In addition, the pouch-cells deliver ultrahigh energy density of up to 6350.7 W h kg −1 based on the mass of cathode materials. K E Y W O R D Scarbon-free, freestanding, high energy efficiency, Li-CO 2 batteries, Mo 3 N 2 nanotubes 1This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…Further efforts were devoted to investigating the catalytic activity of Ru SACs in LCBs, and these studies also confirmed the superior battery performance of SACs compared with that of nanoparticles. 50,191 In 2022, Ryu et al 192 atomically dispersed IrO x /Ir bi-phase particles as SACs on nitrogen-doped carbon nanotubes (NCNTs) to accelerate the reversible formation and decomposition of the insulating carbonate products formed on the electrode of LCBs. Herein, to prove its effectiveness, researchers controlled the particle size and loading of Ir catalysts on the NCNTs (denoted as s-Ir/NCNTs, m-Ir/NCNTs, and l-Ir/NCNTs, with average particle sizes of 0.42, 1.75 and 2.69 nm, respectively).…”

Section: Noble Metal Sacsmentioning

confidence: 99%

Recent progress on single-atom catalysts for lithium–air battery applications

Bai

Xiao

et al. 2023

Energy Environ. Sci.

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Atomically miniaturized bi-phase IrO_x/Ir catalysts loaded on N-doped carbon nanotubes for high-performance Li–CO₂ batteries

Abstract: Li-CO2 batteries are bifunctional, spontaneously storing energy and fixing environmental CO2 without external electricity. Identifying efficient catalysts that can accelerate the reversible formation and decomposition of the insulating carbonate products...

Cited by 24 publications

References 76 publications

Confinement of SnCu_xO₂₊_x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Confinement of SnCu_xO₂₊_x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Freestanding Mo₃N₂ nanotubes for long‐term stabilized 2e⁻ intermediate‐based high energy efficiency Li–CO₂ batteries

Recent progress on single-atom catalysts for lithium–air battery applications

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Atomically miniaturized bi-phase IrOx/Ir catalysts loaded on N-doped carbon nanotubes for high-performance Li–CO2 batteries

Abstract: Li-CO2 batteries are bifunctional, spontaneously storing energy and fixing environmental CO2 without external electricity. Identifying efficient catalysts that can accelerate the reversible formation and decomposition of the insulating carbonate products...

Cited by 24 publications

References 76 publications

Confinement of SnCuxO2+x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Confinement of SnCuxO2+x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Freestanding Mo3N2 nanotubes for long‐term stabilized 2e− intermediate‐based high energy efficiency Li–CO2 batteries

Recent progress on single-atom catalysts for lithium–air battery applications

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Atomically miniaturized bi-phase IrO_x/Ir catalysts loaded on N-doped carbon nanotubes for high-performance Li–CO₂ batteries

Confinement of SnCu_xO₂₊_x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Confinement of SnCu_xO₂₊_x Nanoclusters in Zeolites for High‐Efficient Electrochemical Carbon Dioxide Reduction

Freestanding Mo₃N₂ nanotubes for long‐term stabilized 2e⁻ intermediate‐based high energy efficiency Li–CO₂ batteries