Tuning Surface State in CoFe (Oxy)Hydroxide for Improved Oxygen Evolution Electrocatalysis DOI Open Access
Guo Wen, Chizhong Wang, Lei Qiu

и другие.

Catalysts, Год журнала: 2024, Номер 15(1), С. 11 - 11

Опубликована: Дек. 26, 2024

CoFe-based catalysts have shown excellent activity for the oxygen evolution reaction (OER), with oxidation states of active sites playing a crucial role in determining catalytic performance. However, how to effectively increase state these remains key challenge. In this work, facile treatment NaBH4 solution was employed modulate surface CoFeOxHy catalysts, inducing an enhanced OER activity. The overpotential at 10 mA cm−2 NaBH4-treated CoFe catalyst reduced 270 mV, indicating improved X-ray diffraction (XRD), Raman spectroscopy, and photoelectron spectroscopy (XPS) results reveal that induced phase reconstruction oxalate framework, critical step enhancing its properties. strong reducing ability strengthened Co-Fe interaction, allowing retention low-valence Co species while facilitating formation high-valence Fe sites. This dual modulation significantly accelerated charge transfer kinetics, ultimately boosting These findings highlight importance improving providing insights developing efficient electrochemical water splitting.

Язык: Английский

Interface Engineering of Scalable Graphene Foam Induces hydrophilic/aerophobic trimetallic (Fe, Co, Ni) nanosheets for Efficient Oxygen Evolution DOI

Ming Zhao,

Huihui Jin,

Zibo Chen

и другие.

Surfaces and Interfaces, Год журнала: 2025, Номер unknown, С. 106082 - 106082

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

1
Selective Oxidation of Emerging Contaminants by High-Valent Cobalt(IV)-Oxo Species: Constructing High-Spin Co(III) Sites in Fenton-like System DOI
Zihao Wan, Minghao Xu, Liang Zhou

и другие.

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 364, С. 124852 - 124852

Опубликована: Ноя. 22, 2024

Язык: Английский

Процитировано

5
Na-doped cobalt spinel electrocatalysts prepared by programmed electrostatic spraying for improving OER activity and durability in acidic media DOI
P. Huang, Feng Xu, Changjian Zhou

и другие.

Chemical Engineering Journal, Год журнала: 2024, Номер 500, С. 156846 - 156846

Опубликована: Окт. 23, 2024

Язык: Английский

Процитировано

4
Construction of Surface Ruoct─O─Cooct Units With Optimized Cooct Spin States for Enhanced Oxygen Reduction and Evolution DOI

Can‐Wen Yu,

Zi‐Qiang Chen,

Hongyi Xu

и другие.

Small, Год журнала: 2024, Номер 20(47)

Опубликована: Авг. 24, 2024

The introduction of noble metal into spinel structure is an effective strategy to develop efficient oxygen evolution/reduction reaction (OER/ORR) catalysts. Herein, surface Co

Язык: Английский

Процитировано

3
Advanced In Situ Spectroscopic Techniques for Probing the Acidic Oxygen Evolution Reaction DOI

Shi-Yu Hong,

Ze‐Cheng Yao, Xing Cheng

и другие.

The Journal of Physical Chemistry C, Год журнала: 2024, Номер 128(41), С. 17219 - 17239

Опубликована: Окт. 7, 2024

Proton exchange membrane water electrolysis (PEMWE) is a promising technology for sustainable hydrogen production. However, the anodic oxygen evolution reaction (OER) critical bottleneck restricting power-to-gas efficiency and widespread application of PEMWE devices because harsh acidic oxidative environment causes drastic catalyst structural thus severe dissolution/corrosion as well performance degradation. Currently, lack deep insight identifying real catalytic sites during distinctions mechanisms have hindered development highly active durable OER catalysts PEMWE. Therefore, elucidating OER-induced structure understanding underlying are recognized foundations technology. Against this backdrop, in situ spectroscopic characterization techniques serve powerful tools achieving goal by enabling real-time monitoring capture key intermediates. This Account summarizes recent advances cutting-edge spectroscopy probing process. The fundamentals device configurations these briefly introduced, advantages each technique intermediates to unveil also been discussed. Finally, challenges, trends, prospects field presented.

Язык: Английский

Процитировано

2
Cyclooctatetrathiophene Based MOF-Derived Porous Materials as High- Performance Anode for Lithium-Ion Batteries DOI

Weimiao Zhang,

Yuan Zhong,

Zhan Shen

и другие.

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Сен. 23, 2024

Abstract Extensive research on anodes with higher capacity than carbon materials is driven by the demand for lithium-ion batteries energy density. But cycling stability of high-capacity hindered structural collapse. Metal-organic frameworks (MOFs) are an emerging class crystalline materials, and their derivatives expected as alternative anodes, resulting from merits easy functionalization pore engineering. In this study, a novel porous Co-MOF-derived composite anode was prepared pyrolysis nonporous Co-cyclooctatetrathiophene tetrapyridine (Co-COTTTP) template. The based demonstrated high specific long in assembled cells. Co-COTTTP-500 delivered reversible 1005.7 mAh g−1 after 100 cycles at 0.1 A can be cycled steady 800 1 g−1, indicating structure during cell operation. comprehensive investigation framework composition Co-COTTTP-derived revealed that exposed rich redox active sites, appropriate degree graphitization, heteroatom doping composites effectively enhanced electrochemical performance anodes. summary, study provides feasible strategy to prepare high-performance MOF-derived contributing fabrication high-energy-density batteries.

Язык: Английский

Процитировано

0
Tuning Surface State in CoFe (Oxy)Hydroxide for Improved Oxygen Evolution Electrocatalysis DOI Open Access
Guo Wen, Chizhong Wang, Lei Qiu

и другие.

Catalysts, Год журнала: 2024, Номер 15(1), С. 11 - 11

Опубликована: Дек. 26, 2024

CoFe-based catalysts have shown excellent activity for the oxygen evolution reaction (OER), with oxidation states of active sites playing a crucial role in determining catalytic performance. However, how to effectively increase state these remains key challenge. In this work, facile treatment NaBH4 solution was employed modulate surface CoFeOxHy catalysts, inducing an enhanced OER activity. The overpotential at 10 mA cm−2 NaBH4-treated CoFe catalyst reduced 270 mV, indicating improved X-ray diffraction (XRD), Raman spectroscopy, and photoelectron spectroscopy (XPS) results reveal that induced phase reconstruction oxalate framework, critical step enhancing its properties. strong reducing ability strengthened Co-Fe interaction, allowing retention low-valence Co species while facilitating formation high-valence Fe sites. This dual modulation significantly accelerated charge transfer kinetics, ultimately boosting These findings highlight importance improving providing insights developing efficient electrochemical water splitting.

Язык: Английский

Процитировано

0