Rare‐Earth Single‐Atom Catalysts: A New Frontier in Photo/Electrocatalysis

Small Methods, Journal Year: 2022, Volume and Issue: 6(8)

Published: June 25, 2022

Abstract Single‐atom catalysts (SACs) provide well‐defined active sites with 100% atom utilization, and can be prepared using a wide range of support materials. Therefore, they are attracting global attention, especially in the fields energy conversion storage. To date, research has focused on transition‐metal precious‐metal‐based SACs. More recently, rare‐earth (RE)‐based SACs have emerged as new frontier photo/electrocatalysis owing to their unique electronic structure arising from spin‐orbit coupling 4f valence orbitals, unsaturated coordination environment, behavior charge‐transport bridges. However, systematic review role RE sites, catalytic mechanisms, synthetic methods for is lacking. this review, latest developments having applications summarized discussed. First, theoretical advantages briefly introduced, focusing roles orbitals coupled levels. In addition, most recent progress several important photo/electrocatalytic reactions corresponding mechanisms Further, strategies production reported. Finally, challenges development highlighted, along future directions perspectives.

Language: Английский

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Fundamental, application and opportunities of single atom catalysts for Li-S batteries

Energy storage materials, Journal Year: 2022, Volume and Issue: 55, P. 322 - 355

Published: Dec. 5, 2022

Language: Английский

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Rechargeable Zinc–Air Batteries with an Ultralarge Discharge Capacity per Cycle and an Ultralong Cycle Life

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(30)

Published: April 17, 2023

A conventional two-electrode rechargeable zinc-air battery (RZAB) has two major problems: 1) opposing requirements for the oxygen reduction (ORR) and evolution (OER) reactions from catalyst at air cathode; 2) zinc-dendrite formation, hydrogen generation, zinc corrosion anode. To tackle these problems, a three-electrode RZAB (T-RZAB) including hydrophobic discharge cathode, hydrophilic charge zinc-free anode is developed. The decoupled cathodes enable fast ORR OER kinetics, avoid oxidization of catalyst. using tin-coated copper foam that induces growth (002)Zn planes, suppresses evolution, prevents Zn corrosion. As result, T-RZABs have high capacity per cycle 800 mAh cm-2 , low voltage gap between discharge/charge platforms 0.66 V, an ultralong life 5220 h current density 10 mA . large T-RZAB with Ah no obvious degradation after cycling 1000 Finally, pack energy 151.8 Wh kg-1 cost 46.7 US dollars kWh-1 assembled.

Language: Английский

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Asymmetrically Coordinated Cu–N₁C₂ Single‐Atom Catalyst Immobilized on Ti₃C₂T_x MXene as Separator Coating for Lithium–Sulfur Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(20)

Published: April 9, 2023

Abstract Lithium–sulfur (Li–S) batteries are receiving great attention owing to their large theoretical energy density, but the shuttle effect and sluggish kinetic conversion of lithium polysulfides (LiPSs) seriously restrict practical applications. Herein, various metal single‐atom catalysts immobilized on nitrogen‐doped Ti 3 C 2 T x ( M SA/N‐Ti , = Cu, Co, Ni, Mn, Zn, In, Sn, Pb, Bi) successfully prepared by a neoteric vacancy‐assisted strategy, applied as polypropylene (PP) separator coatings facilitate fast redox adsorption LiPSs for boosting Li–S batteries. Of particular note, among s, Cu /PP exhibits amazing properties, involving excellent rate performance (925 mAh g −1 at C), superb cycling stability over 1000 cycles, ultra‐high sulfur utilization even loadings (7.19 mg cm −2 ; an areal capacity 5.28 ). X‐ray absorption fine spectroscopy density functional theory calculations reveal that asymmetrically coordinated Cu–N 1 moieties act active sites, which possess higher binding larger electron cloud with than pristine facilitating effectively. This work may provide new insights into single atom‐decorated ultrathin 2D materials enhancing electrochemical advanced storage conversion.

Language: Английский

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An extended substrate screening strategy enabling a low lattice mismatch for highly reversible zinc anodes

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 25, 2024

Aqueous zinc batteries possess intrinsic safety and cost-effectiveness, but dendrite growth side reactions of anodes hinder their practical application. Here, we propose the extended substrate screening strategy for stabilizing verify its availability (d

Language: Английский

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Topotactic Transformation of Surface Structure Enabling Direct Regeneration of Spent Lithium-Ion Battery Cathodes

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(13), P. 7288 - 7300

Published: March 6, 2023

Recycling spent lithium-ion batteries (LIBs) has become an urgent task to address the issues of resource shortage and potential environmental pollution. However, direct recycling LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode is challenging because strong electrostatic repulsion from a transition metal octahedron in lithium layer provided by rock salt/spinel phase that formed on surface cycled severely disrupts Li+ transport, which restrains replenishment during regeneration, resulting regenerated with inferior capacity cycling performance. Here, we propose topotactic transformation stable into Ni0.5Co0.2Mn0.3(OH)2 then back NCM523 cathode. As result, relithiation reaction low migration barriers occurs facile transport channel (from one octahedral site another, passing through tetrahedral intermediate) weakened repulsion, greatly improves regeneration. In addition, proposed method can be extended repair black mass, LiNi0.6Co0.2Mn0.2O2, LiCoO2 cathodes, whose electrochemical performance after regeneration comparable commercial pristine cathodes. This work demonstrates fast process modifying channels, providing unique perspective LIB

Language: Английский

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Carbon Surface Chemistry: New Insight into the Old Story

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(42)

Published: Sept. 20, 2022

The enormous complexity of the carbon material family has provoked a phenomenological approach to develop its potential in different applications. Although electronic, chemical, mechanical, and magnetic properties materials have been widely discussed based on defect control engineering, there is still lack fundamental understanding surface chemistry, which leads many controversial conclusions. Here, by analyzing various defects surface, some commonly neglected aspects misunderstandings this field are pointed out, clarifying how chemistry affects chemical behaviors specific reactions. With full-scale consideration with functions can be well defined, indispensable for their scalable Perspectives future developments also provided enable practically accessible design advanced those

Language: Английский

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Zn-based batteries for sustainable energy storage: strategies and mechanisms

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(10), P. 4877 - 4925

Published: Jan. 1, 2024

This review systematically summarizes various redox mechanisms in Zn-based batteries and design strategies to improve their electrochemical performance, which provides a reference for future development of high-performance batteries.

Language: Английский

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Freestanding and Sandwich MXene-Based Cathode with Suppressed Lithium Polysulfides Shuttle for Flexible Lithium–Sulfur Batteries

Nano Letters, Journal Year: 2022, Volume and Issue: 22(3), P. 1207 - 1216

Published: Jan. 27, 2022

Flexible lithium-sulfur (Li-S) batteries with high mechanical compliance and energy density are highly desired. This manuscript reported that large-area freestanding MXene (Ti3C2Tx) film has been obtained through a scalable drop-casting method, significantly improving adhesion to the sulfur layer under continuously bent. Titanium oxide anchored on holey Ti3C2Tx (TiO2/H-Ti3C2Tx) was also produced by well-controlled oxidation of few-layer Ti3C2Tx, which greatly facilitates lithium ion transport as well prevents shuttling polysulfides. Therefore, sandwich electrode demonstrated capacity 740 mAh g-1 at 2 C retention 81% 1 after 500 cycles. Li-S based this have 95% bending times. work provides effective design strategies for flexible wearable electronics.

Language: Английский

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Vacancy-Rich MoSSe with Sulfiphilicity–Lithiophilicity Dual Function for Kinetics-Enhanced and Dendrite-Free Li-S Batteries

Nano Letters, Journal Year: 2022, Volume and Issue: 22(12), P. 4999 - 5008

Published: June 9, 2022

The sluggish redox kinetics of sulfur and the uncontrollable growth lithium dendrites are two main challenges that impede practical applications lithium-sulfur (Li-S) batteries. In this study, a multifunctional host with vacancy-rich MoSSe vertically grown on reduced graphene oxide aerogels (MoSSe/rGO) is designed as material for both lithium. embedding Se into MoS2 lattice introduced to improve inherent conductivity generate abundant anion vacancies endow 3D conductive based specific sulfiphilicity-lithiophilicity. As result, assembled Li-S batteries MoSSe/rGO exhibit greatly improved capacity cycling stability can be operated under lean electrolyte (4.8 μL mg-1) high loading (6.5 mg cm-2), achieving energy density. This study presents unique method unlock catalysis capability lithiophilicity by heteroatom doping defect chemistry kinetics-enhanced dendrite-free

Language: Английский

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