Zinc Assisted Thermal Etching for Rich Edge‐Located Fe‐N4 Active Sites in Defective Carbon Nanofiber for Activity Enhancement of Oxygen Electroreduction DOI Creative Commons

Ruoyu Pang,

Hongyin Xia,

Xieyiming Dong

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(39)

Published: Aug. 19, 2024

Abstract Single‐atom catalysts (SACs) with edge‐located metal active sites exhibit superior oxygen reduction reaction (ORR) performance due to their narrower energy gap and higher electron density. However, controllably designing such fully reveal advantages remains challenging. Herein, rich Fe‐N 4 anchored in hierarchically porous carbon nanofibers (denoted as e 1 ‐Fe‐N‐C) are fabricated via an situ zinc‐assisted thermal etching strategy. The ‐Fe‐N‐C catalyst demonstrates alkaline ORR activity compared counterparts fewer commercial Pt/C. Density functional theory calculations show that the accumulation of more negative charges near formation partially reduced Fe state reduce barrier for process. Additionally, unique structures mesopores macropores facilitate full utilization enhance long‐range mass transfer. zinc–air battery (ZAB) assembled has a peak power density 198.9 mW cm −2 , Pt/C (152.3 ). present strategy by facile controlling amount zinc acetate template systematically superiority sites, providing new design avenue rational defect engineering achieve high‐performance ORR.

Language: Английский

Quasi-solid-state silicon-air batteries with high capacities and wide-temperature adaptabilities DOI
Rong Yan, Junjie Wang,

Shenglin He

et al.

Energy storage materials, Journal Year: 2024, Volume and Issue: 71, P. 103656 - 103656

Published: July 23, 2024

Language: Английский

Citations

48
Screening Spinel Oxide Supports for RuO2 to Boost Bifunctional Electrocatalysts for Advanced Zn–Air Batteries DOI Creative Commons

Xiaohong Zou,

Qian Lü, Jie Wu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)

Published: March 10, 2024

Abstract The compositing strategy offers great potential in designing bifunctional oxygen electrocatalysts for Zn–air batteries. Recent reports reveal that the couple of RuO 2 , serving as a benchmark evolution reaction (OER) catalyst, with other reduction (ORR) catalysts is wise choice to build highly efficient electrocatalysts. However, design criteria ORR and OER activities ‐based composite are still unclear. Herein, series transition metal (Fe, Co, Mn, Ni)‐doped spinel oxides designed support nanorods exploring mechanism. Through advanced technology, it considered increasing content binding energy Co 3+ enhancing oxidation state Ru 4+ an promote /Co‐based oxide catalysts. It found coupling Mn‐doping 3 O 4 (CMO) supports can induce highest catalytic ORR/OER excellent performance rechargeable Operando electrochemical impedance spectroscopy theoretical calculation further prove synergistic effect between CMO originated from overflow overcome large barrier desorption on during adsorption ORR.

Language: Английский

Citations

28
Unraveling the Tandem Effect of Nitrogen Configuration Promoting Oxygen Reduction Reaction in Alkaline Seawater DOI
Siqi Wu, Xiaobin Liu,

Huimin Mao

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(24)

Published: April 10, 2024

Abstract Developing seawater‐based high‐performance oxygen reduction reaction (ORR) electrocatalysts is meaningful to renewable energy storage and conversion, the Fe‐based derivatives encapsulated by nitrogen (N) doped carbon are typical representative. Nevertheless, unrevealing mechanism of N configuration ORR activity chlorine resistance still a great challenge. In this work, feasible strategy developed prepare controllable pyridinic/pyrrolic‐N carbon‐coated (Fe x N‐NC). Drawing support from H 3 PO 4 blocking based in situ Fourier transform infrared spectroscopy (FTIR) test density‐functional theory (DFT) calculation, tandem effect pyridinic‐N pyrrolic‐N on proved. Additionally, low hydrogen peroxide (H 2 O ) yield 4e − pathway Fe N‐NC demonstrate that doping effectively reduces adsorption Cl , which consistent with DFT. The half‐wave potential (E 1/2 for reaches 0.874 V alkaline seawater, ZABs assembled as air cathode deliver remarkable power density (162 mW cm −2 ), along excellent long‐term durability (>400 h).

Language: Английский

Citations

20
Promoting Electrocatalytic Oxygen Reactions Using Advanced Heterostructures for Rechargeable Zinc–Air Battery Applications DOI
D.L. Qiu, Huihui Wang,

Tingting Ma

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(33), P. 21651 - 21684

Published: Aug. 12, 2024

In order to facilitate electrochemical oxygen reactions in electrically rechargeable zinc-air batteries (ZABs), there is a need develop innovative approaches for efficient electrocatalysts. Due their reliability, high energy density, material abundance, and ecofriendliness, ZABs hold promise as next-generation storage conversion devices. However, the large-scale application of currently hindered by slow kinetics reduction reaction (ORR) evolution (OER). development heterostructure-based electrocatalysts has potential surpass limitations imposed intrinsic properties single material. This Account begins with an explanation configurations fundamentals electrochemistry air electrode. Then, we summarize recent progress respect variety heterostructures that exploit bifunctional electrocatalytic overview impact on ZAB performance. The range heterointerfacial engineering strategies improving ORR/OER performance includes tailoring surface chemistry, dimensionality catalysts, interfacial charge transfer, mass transport, morphology. We highlight multicomponent design take these features into account create advanced highly active catalysts. Finally, discuss challenges future perspectives this important topic aim enhance activity batteries.

Language: Английский

Citations

18
Single-phase ruthenium-based oxide with dual-atoms induced bifunctional catalytic centers enables highly efficient rechargeable Zn-air batteries DOI Creative Commons
Qian Lü,

Xiaohong Zou,

Yunfei Bu

et al.

Energy storage materials, Journal Year: 2024, Volume and Issue: 68, P. 103341 - 103341

Published: March 11, 2024

Composite strategies for constructing dual-atom sites at the hetero-interface provide considerable prospects designing efficient bifunctional oxygen catalysts. Given insufficient interface site and instability of phase interface, we need to develop more efficiently utilizing site. Here, report a doping strategy construct abundant in single-phase oxide Ru/Mn bond formation enables electronic interaction between Ru Mn, which reduces oxidation state meanwhile constructs electron-rich states Mn sites. DFT calculation was further applied explore reaction mechanism. We found that atoms serve as reduction evolution catalytic respectively facilitate adsorption OH* desorption. More importantly, co-adsorption OOH* on Mn/Ru dual can greatly enhance activity. The resulting Mn-RuO2 catalyst exhibits an ultra-low ORR/OER overpotential just 0.65 V, substantially lower than RuO2 MnOx. Remarkably, also demonstrates excellent stability, with minimal ORR decay after repeated OER cycling. Rechargeable zinc-air batteries using Mn-doped achieve super-durability 2000 cycles final energy efficiency retention 87.5%.

Language: Английский

Citations

16
Atomic Cobalt Metal Centers with Asymmetric N/B‐Coordination for Promoting Oxygen Reduction Reaction DOI

Guangjian Guan,

Yuhang Liu, Fuhua Li

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)

Published: July 5, 2024

Abstract Cobalt single atom catalysts (SACs) have exhibited promising performance in both the oxygen reduction reaction (ORR) and evolution (OER), positioning them as potential dual‐functional for Zn‐air battery. However, long‐standing challenge lies achieving satisfactory dual‐functionality stability of these SACs. In this study, to optimize 4e ‒ ORR performance, boron (B) atoms are employed with low electronegativity regulate structure Co–N–C catalytic center. This resulted formation an asymmetrically coordinated Co metal center catalyst (Co‐N 3 B). Compared Co‐N 4 , B lower free energy stronger adsorption toward * O species, effectively suppressing 2e pathway at cobalt site preventing corrosion induced by hydrogen peroxide (H 2 ) reactions, thereby enhancing stability. situ attenuated total reflectance surface‐enhanced infrared absorption spectroscopy (ATR‐SEIRAS) further validated excellent interaction between active centers intermediates. Furthermore, self‐made rechargeable zinc‐air battery demonstrated remarkable discharge peak power density (≈253 mW cm ‒2 ), (≈819 mAh g ‒1 cyclic exceeding 110 h. study provides new insights into constructing atomic‐level precision offers strong references practical applications storage convension electrocatalysts.

Language: Английский

Citations

16
Regulating Reconstruction‐Engineered Active Sites for Accelerated Electrocatalytic Conversion of Urea DOI Creative Commons
Jichao Zhang, Jianrui Feng, Jiexin Zhu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(36)

Published: June 14, 2024

Reconstruction-engineered electrocatalysts with enriched high active Ni species for urea oxidation reaction (UOR) have recently become promising candidates energy conversion. However, to inhibit the over-oxidation of brought by valence state Ni, tremendous efforts are devoted obtaining low-value products nitrogen gas avoid toxic nitrite formation, undesirably causing inefficient utilization cycle. Herein, we proposed a mediation engineering strategy significantly boost high-value formation help close loop employment economy. Specifically, platinum-loaded nickel phosphides (Pt-Ni

Language: Английский

Citations

14
Highly active air electrode catalysts for Zn‐air batteries: Catalytic mechanism and active center from obfuscation to clearness DOI Creative Commons

Wenhui Deng,

Zirui Song,

Mingjun Jing

et al.

Carbon Neutralization, Journal Year: 2024, Volume and Issue: 3(4), P. 501 - 532

Published: June 4, 2024

Abstract Carbon‐based materials have been found to accelerate the sluggish kinetic reaction and are largely subject overall Zn‐air batteries (ZABs) property, while their full catalytic mechanism is still not excavated because of indistinct internal structure immature in‐situ technology. Up now, systematic methods utilized study design promising high‐performance carbon‐based catalysts. To resolve real active units mechanism, developing molecular catalyst a significant strategy. Herein, review will initiate briefly introduce working principle composition ZABs. An important statement correspondingly provided about typical mechanisms for air cathode material. It also presents tremendous endeavors on performance stability Furthermore, combined with theoretical calculation, self‐defined sites analyzed understand character, where subsequently summarized discussed through highlighting unambiguous controllable structure, in hope surfacing optimum catalyst. Building fundamental understanding catalysts, this expected provide guidance direction toward designing future mechanistic studies ORR electrocatalysts.

Language: Английский

Citations

13
Recent Progress and Prospects of Manganese–Nitrogen–Carbon Electrocatalysts for Oxygen Reduction Reaction DOI
Zehui Wang,

Pengcheng Yan,

Daijie Deng

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(12), P. 10589 - 10612

Published: June 7, 2024

The oxygen reduction reaction (ORR) holds significant importance in the electrochemical processes of energy conversion systems. kinetics ORR are sluggish as it is involved multistep reactions. It imperative to investigate electrocatalysts with outstanding performance and durability accelerating their kinetics. Manganese–nitrogen–carbon (Mn–N–C) materials offer advantages including efficient atom utilization easily tunable coordination structures, rendering them promising candidates for enhancing catalytic activity. mini-review provides a concise overview fundamental principles underlying ORR. Then, three strategies regulating structure summarized improve activity Mn–N–C catalysts: adjusting number N atoms around Mn atoms, doping nonmetal metal atoms. Finally, this outlines challenges prospects associated catalyst This anticipated deepen comprehension readers by presenting targeted optimization methods regulate configuration catalysts.

Language: Английский

Citations

12
Metal‐Organic Framework Materials as Bifunctional Electrocatalyst for Rechargeable Zn‐Air Batteries DOI Open Access
Fangqing Liu, Xiaoyi Lu, Chenglong Shi

et al.

Batteries & Supercaps, Journal Year: 2024, Volume and Issue: 7(11)

Published: Aug. 15, 2024

Abstract Rechargeable Zn‐air batteries offer the advantages of environmental friendliness, safety, low prices and high energy density, are highly valued. However, major challenge faced by rechargeable nowadays is efficiency due to slow reaction kinetics electrocatalyst at air cathode. Bifunctional catalysts key development improving their overall performance long‐term cycling stability. Metal‐organic framework (MOF) materials have shown great benefits as oxygen electrocatalysts in promoting reduction (ORR) evolution (OER). This paper reviews recent advances three kinds MOF bifunctional for batteries. Additionally, this also discusses synthetic design strategy composite derivatives, concludes suggesting application field

Language: Английский

Citations

10