Advances in Spin Catalysts for Oxygen Evolution and Reduction Reactions DOI
Haoyun Bai, Jinxian Feng, Di Liu

et al.

Small, Journal Year: 2022, Volume and Issue: 19(5)

Published: Nov. 23, 2022

Abstract Searching for high effective catalysts has been an endless effort to improve the efficiency of green energy harvesting and degradation pollutants. In past decades, tremendous strategies are explored achieve catalysts, various theoretical understandings proposed improved activity. As catalytic reaction occurs at surface or edge, unsaturated ions may lead fluctuation spin. Meanwhile, transition metals in have diverse spin states yield effects. Therefore, role magnetic moment should be carefully examined. this review, recent development is discussed give insightful view on origins First, a brief introduction applications advances spin‐related phenomena, given, then fundamental principles fields‐radical reactions introduced second part. The performance reported oxygen evolution/reduction (OER/ORR) systematically third part, general rules summarized accordingly. Finally, challenges perspectives given. This review provide understanding microscopic mechanisms phenomena guide design catalysts.

Language: Английский

Electrochemistry in Magnetic Fields DOI
Songzhu Luo, Kamal Elouarzaki, Zhichuan J. Xu

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(27)

Published: April 25, 2022

Developing new strategies to advance the fundamental understanding of electrochemistry is crucial mitigating multiple contemporary technological challenges. In this regard, magnetoelectrochemistry offers many strategic advantages in controlling and electrochemical reactions that might be tricky regulate conventional fields. However, topic highly interdisciplinary, combining concepts from electrochemistry, hydrodynamics, magnetism with experimental outcomes are sometimes unexpected. Review, we survey recent advances using a magnetic field different applications organized by effect generated forces on principles focus how leads observed results. Finally, discuss challenges remain addressed establish robust capable meeting present needs.

Language: Английский

Citations

148
Magnetic field facilitated electrocatalytic degradation of tetracycline in wastewater by magnetic porous carbonized phthalonitrile resin DOI Open Access

Junling Zeng,

Wenhao Xie, Ying Guo

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123225 - 123225

Published: Aug. 25, 2023

Language: Английский

Citations

124
Altering the spin state of Fe-N-C through ligand field modulation of single-atom sites boosts the oxygen reduction reaction DOI

Dongping Xue,

Pengfei Yuan, Su Jiang

et al.

Nano Energy, Journal Year: 2022, Volume and Issue: 105, P. 108020 - 108020

Published: Nov. 21, 2022

Language: Английский

Citations

102
Spin Effect to Promote Reaction Kinetics and Overall Performance of Lithium‐Sulfur Batteries under External Magnetic Field DOI
Chaoyue Zhang, Chaoqi Zhang,

Guo Wen Sun

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(49)

Published: Oct. 11, 2022

Abstract Lithium‐sulfur batteries (LSBs) are still limited by the shuttle of lithium polysulfides (LiPS) and slow Li−S reaction. Herein, we demonstrate that when using cobalt sulfide as a catalytic additive, an external magnetic field generated permanent magnet can significantly improve LiPS adsorption ability reaction kinetics. More specifically, results show both experimentally theoretically how electron spin polarization Co ions reduces repulsion enhances degree orbital hybridization, thus resulting in LSBs with unprecedented performance stability. Under field, 0.0084 % per cycle decay rate at 2 C during 8150 cycles produced. Overall, this work not only demonstrates effective strategy to promote electrochemical conversion no additional energy cost but also enriches application effect electrocatalysis fields.

Language: Английский

Citations

90
Revealing Spin Magnetic Effect of Iron-Group Layered Double Hydroxides with Enhanced Oxygen Catalysis DOI
Liu Lin,

Ruiyun Xin,

Mengwei Yuan

et al.

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(2), P. 1431 - 1440

Published: Jan. 9, 2023

The oxygen evolution reaction (OER) is the bottleneck limiting process of water splitting. OER involves recombination from diamagnetic singlet state OH or H2O to paramagnetic triplet O2. spin conservation for oxygenated intermediates must play an important role in OER. However, dynamic mechanism magnetic field-induced polarization still its infancy. Herein, based on spin-coupling interaction iron group elements, three typical layered double hydroxides (LDHs) were constructed study relationship among field, polarization, and activity. Combining experimental theoretical studies, we revealed spin-magnetic effect LDHs enhancing process. There a positive correlation between saturation magnetization performance under different fields. NiCoFe-LDHs (NCFL) endows strongest activity (η10 = 230 mV) (Ms 44 emu mg–1) compared with that CoFe-LDHs (CFL, η10 372 mV, Ms 21 NiFe-LDHs (NFL, 246 29 mg–1). density functional theory calculations show Fe sites NCFL endow stronger OH, Raman spectroscopy further proves promotion formation O–O bond NCFL. Applying external due LDHs, enhancement amplitude also positively correlated magnetism catalyst. has about −34.8 mV T–1 NFL (−27.0 T–1) CFL (−16.7 T–1). overpotential only 206 condition 700 mT field. In conclusion, demonstrate underlying influence provide insights into catalysts intermediates. These would help understand design at spintronic level.

Language: Английский

Citations

75
Spin states of metal centers in electrocatalysis DOI Creative Commons
Yuwei Zhang, Qian Wu, Justin Zhu Yeow Seow

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(16), P. 8123 - 8136

Published: Jan. 1, 2024

This tutorial review provides a comprehensive introduction to the spin state of metal centers and its role in electrocatalysis.

Language: Английский

Citations

28
Spin-Magnetic Effect of d-π Conjugation Polymer Enhanced O–H Cleavage in Water Oxidation DOI
Liu Lin,

Yunming Xu,

Yiting Han

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(11), P. 7363 - 7372

Published: March 7, 2024

A deep understanding of the mechanism for spin-magnetic effect on O–H cleavage is crucial development new catalysts water oxidation. Herein, we designed and synthesized crystalline Fe-DABDT Co-DABDT (DABDT = 2,5-diaminobenzene-1,4-dithiol) optimized an effective magnetic moment to explore role in regulation oxidation activity. It can be found that OER activity catalyst positively correlated with its moment. Under external field, more spin single electrons has a stronger response than Fe/Co-DABDT Co-DABDT. The increase current nearly 2 times higher Experimental density functional theory studies show magnetized Fe sites could realize nucleophilic reaction, accelerate polarization electron states, promote polar decomposition formation O–O bond. This study provides mechanistic insight into oxygen evolution reaction further origin catalytic activity, which expected improve energy efficiency hydrogen production.

Language: Английский

Citations

26
Field-assisted metal-air batteries: Recent progress, mechanisms, and challenges DOI
Wenliang Wang,

Tao Yu,

Ying Cheng

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 125, P. 109550 - 109550

Published: March 28, 2024

Language: Английский

Citations

20
Enhancement of electrocatalysis through magnetic field effects on mass transport DOI Creative Commons
Priscila Vensaus, Yunchang Liang, Jean‐Philippe Ansermet

et al.

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

Published: April 3, 2024

Abstract Magnetic field effects on electrocatalysis have recently gained attention due to the substantial enhancement of oxygen evolution reaction (OER) ferromagnetic catalysts. When detecting an enhanced catalytic activity, effect magnetic fields mass transport must be assessed. In this study, we employ a specifically designed magneto-electrochemical system and non-magnetic electrodes quantify effects. Our findings reveal marginal in reactions with high reactant availability, such as OER, whereas boosts exceeding 50% are observed diffusion limited reactions, exemplified by reduction (ORR). Direct visualization quantification whirling motion ions under underscore importance Lorentz forces acting electrolyte ions, demonstrate that bubbles’ movement is secondary phenomenon. results advance fundamental understanding unveil new prospects for developing more efficient sustainable energy conversion technologies.

Language: Английский

Citations

19
Magnetic Field‐Assisted Water Splitting: Mechanism, Optimization Strategies, and Future Perspectives DOI

Shengyu Ma,

Qiang Fu, Jiecai Han

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 15, 2024

Abstract Rationally designing of highly efficient electrocatalysts is critical to improving hydrogen production by water electrolysis. However, bottlenecks still require consideration when optimizing the intrinsic performance electrocatalysts. Applying appropriate external fields catalytic systems may effectively overcome such and enhance catalysts. Among various fields, magnetic field has received extensive attention owing its multifunctionality, non‐contact nature, non‐invasiveness, thereby requiring more research development. In this review, recent advances in field‐assisted electrolysis are systematically outlined. Firstly, diverse methods used for pre‐regulating catalysts under including optimized nucleation, induction heating, directed growth, discussed. It then explores effects on electrochemical processes, magnetothermal, magnetohydrodynamic, induced electric impact. Then, influences properties catalysts, as spin polarization reconstruction effects, addressed. Finally, a discussion potential perspectives field‐enhanced splitting, catalyst design, experimental precision, situ characterization, provided guide further research.

Language: Английский

Citations

18