Magnetically Enhanced Oxygen Evolution Reaction in Mild Alkaline Electrolytes by Building Catalysts on Magnetic Frame DOI

Minghui Xie,

Haotian Wang, Xianjun Li

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Сен. 9, 2024

Abstract Under large current densities, the excessive hydroxide ion (OH) consumption hampers alkaline water splitting involving oxygen evolution reaction (OER). High OH concentration (≈30 wt.%) is often used to enhance catalytic activity of OER, but it also leads higher corrosion in practical systems. To achieve low concentration, catalysts on magnetic frame (CMF) are built utilize local convection induced from host frame's field distributions. This way, a rate can be achieved relatively lower concentrations. A CMF model system with catalytically active CoFeO x nanograins grown Ni foam demonstrated. The OER @NF receives ≈90% enhancement under 400 mT (900 mA cm −2 at 1.65 V) compared that zero field, and exhibits remarkable durability over 120 h. As demonstration, water‐splitting performance sees maximum 45% 1 m KOH (700 2.4 V), equivalent same electrode more corrosive 2 electrolyte. Therefore, catalyst‐on‐magnetic‐frame strategy make efficient use by harvesting convection.

Язык: Английский

Essential features of weak current for excellent enhancement of NOx reduction over monoatomic V-based catalyst DOI Creative Commons

Daying Zheng,

Kaijie Liu, Zeshu Zhang

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Авг. 6, 2024

Human society is facing increasingly serious problems of environmental pollution and energy shortage, up to now, achieving high NH3-SCR activity at ultra-low temperatures (<150 °C) remains challenging for the V-based catalysts with V content below 2%. In this study, monoatomic catalyst under weak current-assisted strategy can completely convert NOx into N2 temperature 1.36%, which shows preeminent turnover frequencies (TOF145 °C = 1.97×10−3 s−1). The improvement catalytic performance mainly attributed enhancement catalysis current (ECWC) rather than electric field, significantly reduce consumption system by more 90%. further mechanism research ECWC based on a series characterization means DFT calculations confirms that migrated electrons concentrate around single atoms increase proportion antibonding orbitals, make V-O chemical bond weaker (electron scissors effect) thus accelerate oxygen circulation. novel in present work potentially apply other fields. Achieving NH3 selective reduction (below 150 challenge catalysts. Here authors explore electron effect catalysis, enables exhibit exceptional denitration temperatures.

Язык: Английский

Процитировано

56

An overview of silicon-air batteries: Principle, current state and future perspectives DOI
Sujuan Hu, Ziyu Wang, Junjie Wang

и другие.

Coordination Chemistry Reviews, Год журнала: 2024, Номер 517, С. 216045 - 216045

Опубликована: Июль 1, 2024

Язык: Английский

Процитировано

41

Unlocking the potential of hydrogen evolution: Advancements in 3D nanostructured electrocatalysts supported on nickel foam DOI

Chengzhi Xiao,

Tongzhou Hong,

Jin Jia

и другие.

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 355, С. 124197 - 124197

Опубликована: Май 12, 2024

Язык: Английский

Процитировано

20

Vacancy defect activation spin magnetic effect of Ni(OH)2 enhanced oxygen catalysis DOI
Tongyue Wang, Haomin Jiang, Cheng Zhang

и другие.

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 72, С. 201 - 208

Опубликована: Май 29, 2024

Язык: Английский

Процитировано

10

Reconstruction of Ferromagnetic/non‐magnetic Cobalt‐based Electrocatalysts under Gradient Magnetic Fields for Enhanced Oxygen Evolution DOI

Shengyu Ma,

Kaixi Wang,

Moniba Rafique

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(46)

Опубликована: Авг. 6, 2024

Abstract The rational manipulation of the surface reconstruction catalysts is a key factor in achieving highly efficient water oxidation, but it challenge due to complex reaction conditions. Herein, we introduce novel situ strategy under gradient magnetic field form catalytically active species on ferromagnetic/paramagnetic CoFe 2 O 4 @CoBDC core–shell structure for electrochemical oxygen evolution (OER). We demonstrate that Kelvin force from cores’ local modulates shells’ reconstruction, leading higher proportion Co 2+ as sites. These sites with optimized electronic configuration exhibit more favorable adsorption energy oxygen‐containing intermediates and lower activation overall catalytic reaction. As result, significant enhancement OER performance achieved large current density increment about 128 % at 1.63 V an overpotential reduction by 28 mV 10 mA cm −2 after reconstruction. Interestingly, removing external field, activity could persist over 100 h. This work showcases directional enhanced oxidation.

Язык: Английский

Процитировано

10

Modulation of Electrochemical Reactions through External Stimuli: Applications in Oxygen Evolution Reaction and Beyond DOI
Baoshan Liu, Haoyin Zhong, Jing Liu

и другие.

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Electrochemical water splitting is a promising method for generating green hydrogen gas, offering sustainable approach to addressing global energy challenges. However, the sluggish kinetics of anodic oxygen evolution reaction (OER) poses great obstacle its practical application. Recently, increasing attention has been focused on introducing various external stimuli modify OER process. Despite significant enhancement in catalytic performance, an in-depth understanding origin superior activity contributed by remains elusive, which significantly hinders further development highly efficient and durable electrolyzed devices. Herein, this review systematically summarizes recent advancements stimuli, including photon irradiation, applied magnetic field, thermal heating, etc., boost activities. In particular, underlying mechanisms promote species transfer, electronic structure electrocatalysts, accelerate structural reconstruction are highlighted. Additionally, applications other electrocatalytic reactions also presented. Finally, several remaining challenges future opportunities discussed, providing insights that could study support rational design storage conversion

Язык: Английский

Процитировано

2

Insights into Operating Conditions on Electrocatalytic CO2 Reduction DOI Open Access
Zhaozhao Zhu, Wu Tang, Junjie Wang

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Abstract Electrocatalytic CO 2 reduction (CO RR) is rapidly emerging as a promising sustainable strategy for transforming into valuable fuels and chemical feedstocks, crucial step toward carbon‐neutral society. The efficiency, selectivity, stability of RR are heavily influenced by the chosen catalyst operating conditions used. Despite substantial advances in development catalysts, there scarcity comprehensive reviews focusing on influence different environments performance. This review offers detailed examination internal external environmental control strategies designed to enhance efficiency. fundamental reaction mechanisms through situ operational techniques, paired with theoretical analyses, discussed while also identifying key challenges future research directions technology. By delivering overview current state field, this highlights critical role control, mechanistic insights, practical considerations needed successful commercialization

Язык: Английский

Процитировано

2

Static magnetic field-enhanced cathodic electrocatalysis of Fe3O4-based nitrogen-doped carbon for improving the performance of microbial fuel cells DOI

Hai-Xia Liao,

OU Dong-ni,

Xiaofeng Zhou

и другие.

Bioresource Technology, Год журнала: 2025, Номер 426, С. 132345 - 132345

Опубликована: Март 4, 2025

Язык: Английский

Процитировано

1

Experimental evidences of the direct influence of external magnetic fields on the mechanism of the electrocatalytic oxygen evolution reaction DOI Creative Commons
Camilo A. Mesa, Felipe A. Garcés‐Pineda, Miguel García‐Tecedor

и другие.

APL Energy, Год журнала: 2024, Номер 2(1)

Опубликована: Фев. 12, 2024

The use of magnetic fields as external stimuli to improve the kinetics electrochemical reactions is attracting substantial attention, given their potential reduce energy losses. Despite recent reports showing a positive effect on catalytic performance upon applying field working electrode, there are still many uncertainties and lack experimental evidence correlating presence electrocatalytic performance. Here, we present combination spectroscopic tools that demonstrate how an alters reaction mechanism oxygen evolution (OER), accelerating overall Ni4FeOx electrode. Complementary has been gathered supporting participation this microscopic effect. Electrochemical impedance spectroscopy (EIS) points speed-up intrinsic kinetics, independent other indirect effects. In same direction, spectro-electrochemical fingerprint intermediate species appear during cycle, detected under operando conditions, indicates change in order function hole accumulation. All these data confirm direct influence at origin magnetically enhanced OER.

Язык: Английский

Процитировано

6

Strain engineering induced surfacial catalytic amorphous Ni3C with room temperature ferromagnetism for magnetic heating enhancement of overall water-splitting DOI
Yuan Huang, Hang Zhou, Xingfang Luo

и другие.

Chemical Engineering Journal, Год журнала: 2024, Номер 486, С. 150174 - 150174

Опубликована: Март 4, 2024

Язык: Английский

Процитировано

6