High density iridium synergistic sites boosting CO-tolerate performance for PEMFC anode DOI Creative Commons
Tongtong Yang, Xiaolong Yang, Nanxing Gao

et al.

eScience, Journal Year: 2024, Volume and Issue: 4(4), P. 100230 - 100230

Published: Jan. 10, 2024

The usage of cheap crude H2 in proton-exchange membrane fuel cells (PEMFCs) is still unrealistic to date, due the suffering current Pt based nano-catalysts from impurities such as CO anode. Recently, synergistic active sites between single atom (SA) and nanoparticle (NP) have been found be promising for overcoming poisoning problem. However, lengthening nanoparticle-single (SA-NP) interface, i.e., constructing high density sites, remains highly challenging. Herein, we present a new strategy on molecular fusion create abundant SA-NP interfaces, with interfaces created 2D nitrogen doped carbon nanosheets (Ir-SACs&NPs/NC). Owing abundance interface catalyst was empowered tolerance towards up 1000 ppm feed. These findings provide guidelines design construction anti-poisoning catalysts PEMFC

Language: Английский

Bifunctional Single Atom Catalysts for Rechargeable Zinc–Air Batteries: From Dynamic Mechanism to Rational Design DOI

Peng Zhang,

Kuo Chen, Jiaye Li

et al.

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

Published: June 7, 2023

Ever-growing demands for rechargeable zinc-air batteries (ZABs) call efficient bifunctional electrocatalysts. Among various electrocatalysts, single atom catalysts (SACs) have received increasing attention due to the merits of high utilization, structural tunability, and remarkable activity. Rational design SACs relies heavily on an in-depth understanding reaction mechanisms, especially dynamic evolution under electrochemical conditions. This requires a systematic study in mechanisms replace current trial error modes. Herein, fundamental oxygen reduction is first presented combining situ and/or operando characterizations theoretical calculations. By highlighting structure-performance relationships, rational regulation strategies are particularly proposed facilitate SACs. Furthermore, future perspectives challenges discussed. review provides thorough SACs, which expected pave avenue exploring optimum effective ZABs.

Language: Английский

Citations

109
One‐Pot Etching Pyrolysis to Defect‐Rich Carbon Nanosheets to Construct Multiheteroatom‐Coordinated Iron Sites for Efficient Oxygen Reduction DOI
Shichao Peng,

Xilan Ma,

Jiachen Tian

et al.

Small, Journal Year: 2024, Volume and Issue: 20(33)

Published: April 9, 2024

Constructing multiheteroatom coordination structure in carbonaceous substrates demonstrates an effective method to accelerate the oxygen reduction reaction (ORR) of supported single-atom catalyst. Herein, novel etching route assisted by potassium thiocyanate (KCNS) is developed convert metal-organic framework 2D defect-rich porous N,S-co-doped carbon nanosheets for anchoring atomically dispersed iron sites as high-performance ORR catalysts (Fe-SACs). The well-designed KCNS-assisted can generate spatial confinement template direct nanosheet formation, condition form structure, and additional sulfur atoms coordinate species. Spectral microscopy analysis reveals that element Fe-SACs highly isolated on anchored nitrogen unsymmetrical Fe-S

Language: Английский

Citations

49
Physical upcycling of spent artificial diamond accelerant into bifunctional oxygen electrocatalyst with dual-metal active sites for durable rechargeable Zn–air batteries DOI

Kuixing Ding,

Jiugang Hu, Liming Zhao

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 121, P. 109270 - 109270

Published: Jan. 9, 2024

Language: Английский

Citations

37
Advances of Synergistic Electrocatalysis Between Single Atoms and Nanoparticles/Clusters DOI Creative Commons

Guanyu Luo,

Min Young Song, Qian Zhang

et al.

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: July 9, 2024

Combining single atoms with clusters or nanoparticles is an emerging tactic to design efficient electrocatalysts. Both synergy effect and high atomic utilization of active sites in the composite catalysts result enhanced electrocatalytic performance, simultaneously provide a radical analysis interrelationship between structure activity. In this review, recent advances single-atomic site coupled are emphasized. Firstly, synthetic strategies, characterization, dynamics types clusters/nanoparticles introduced, then key factors controlling discussed. Next, several clean energy catalytic reactions performed over synergistic illustrated. Eventually, encountering challenges recommendations for future advancement energy-transformation electrocatalysis outlined.

Language: Английский

Citations

34
Design Principles and Mechanistic Understandings of Non-Noble-Metal Bifunctional Electrocatalysts for Zinc–Air Batteries DOI Creative Commons
Yunnan Gao, Ling Liu, Yi Jiang

et al.

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: March 26, 2024

Zinc-air batteries (ZABs) are promising energy storage systems because of high theoretical density, safety, low cost, and abundance zinc. However, the slow multi-step reaction oxygen heavy reliance on noble-metal catalysts hinder practical applications ZABs. Therefore, feasible advanced non-noble-metal electrocatalysts for air cathodes need to be identified promote catalytic reaction. In this review, we initially introduced advancement ZABs in past two decades provided an overview key developments field. Then, discussed working mechanism design bifunctional from perspective morphology design, crystal structure tuning, interface strategy, atomic engineering. We also included studies, machine learning, characterization technologies provide a comprehensive understanding structure-performance relationship pathways redox reactions. Finally, challenges prospects related designing

Language: Английский

Citations

29
Encaging Co nanoparticle in atomic Co N4-dispersed graphite nanopocket evokes high oxygen reduction activity for flexible Zn-air battery DOI

Yuandong Yang,

Yi Xiao, Linjie Zhang

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 347, P. 123792 - 123792

Published: April 24, 2024

Language: Английский

Citations

26
Structure–Activity Relationships in Oxygen Electrocatalysis DOI

Jingyi Han,

Jingru Sun,

Siyu Chen

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Abstract Oxygen electrocatalysis, as the pivotal circle of many green energy technologies, sets off a worldwide research boom in full swing, while its large kinetic obstacles require remarkable catalysts to break through. Here, based on summarizing reaction mechanisms and situ characterizations, structure–activity relationships oxygen electrocatalysts are emphatically overviewed, including influence geometric morphology chemical structures electrocatalytic performances. Subsequently, experimental/theoretical is combined with device applications comprehensively summarize cutting‐edge according various material categories. Finally, future challenges forecasted from perspective catalyst development applications, favoring researchers promote industrialization electrocatalysis at an early date.

Language: Английский

Citations

24
Asymmetric Coordination of Bimetallic Fe–Co Single-Atom Pairs toward Enhanced Bifunctional Activity for Rechargeable Zinc–Air Batteries DOI
Zhitong Li, Xiongwei Zhong,

Leyi Gao

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(20), P. 13006 - 13018

Published: May 13, 2024

The advancement of rechargeable zinc–air batteries (RZABs) faces challenges from the pronounced polarization and sluggish kinetics oxygen reduction evolution reactions (ORR OER). Single-atom catalysts offer an effective solution, yet their insufficient or singular catalytic activity hinders development. In this work, a dual single-atom catalyst, FeCo-SAs, was fabricated, featuring atomically dispersed N3–Fe–Co–N4 sites on N-doped graphene nanosheets for bifunctional activity. Introducing Co into Fe single-atoms secondary pyrolysis altered coordination with N, creating asymmetric environment that promoted charge transfer increased density states near Fermi level. This catalyst achieved narrow potential gap 0.616 V, half-wave 0.884 V ORR (vs reversible hydrogen electrode) low OER overpotential 270 mV at 10 mA cm–2. Owing to superior RZABs exhibited peak power 203.36 mW cm–2 extended cycle life over 550 h, exceeding commercial Pt/C + IrO2 catalyst. Furthermore, flexible FeCo-SAs demonstrated promising future bimetallic pairs in wearable energy storage devices.

Language: Английский

Citations

23
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

21
Advances in regulating the electron spin effect toward electrocatalysis applications DOI Creative Commons
Liu Lin,

Peiyuan Su,

Yiting Han

et al.

eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100264 - 100264

Published: March 1, 2024

Building highly reactive electrocatalysts is of great significance for addressing the energy crisis and developing green energy. Electrocatalytic reactions occur at interface catalysts, where physicochemical properties catalyst surface play a dominant role. In particular, electron spin behavior on has decisive impact catalytic reaction process. This review initially introduces definition methods manipulation. Furthermore, we summarize advanced characterization spin. Then, latest research advancements effect in oxygen reduction reaction, evolution carbon dioxide nitrogen reaction. The mechanisms manipulation these four are thoroughly discussed. Finally, propose key directions future development effects field electrocatalysis. contributes to deeper understanding micromechanisms electrocatalytic reactions.

Language: Английский

Citations

20