Real Active Site Identification of Co/Co3O4 Anchoring Ni-MOF Nanosheets with Fast OER Kinetics for Overall Water Splitting DOI
Haoran Yin,

Xinqiang Liu,

Lixia Wang

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(15), P. 7045 - 7052

Published: April 3, 2024

Doping metals and constructing heterostructures are pivotal strategies to enhance the electrocatalytic activity of metal–organic frameworks (MOFs). Nevertheless, effectively designing MOF-based catalysts that incorporate both doping multiphase interfaces poses a significant challenge. In this study, one-step Co-doped Co3O4-modified Ni-MOF catalyst (named Ni NDC-Co/CP) with thickness approximately 5.0 nm was synthesized by solvothermal-assisted etching growth strategy. Studies indicate formation Co–O–Ni–O-Co bond in NDC-Co/CP found facilitate charge density redistribution more than Co–O–Ni bimetallic synergistic effect NiCo NDC/CP. The designating achieved superior oxygen evolution reaction (OER) (245 mV @ 10 mA cm–2) robust long stability (100 h 100 1.0 M KOH. Furthermore, NDC-Co/CP(+)||Pt/C/CP(−) displays pregnant overall water splitting performance, achieving current cm–2 at an ultralow voltage 1.52 V, which is significantly lower commercial electrolyzer using Pt/C IrO2 electrode materials. situ Raman spectroscopy elucidated transformation NDC-Co Ni(Co)OOH under electric field. This study introduces novel approach for rational design OER electrocatalysts.

Language: Английский

Improving the polyester powder coating self-healing anti-corrosion properties via the steel surface decoration with Ce-doped-ZIF-8@ZPMn film DOI

A. Davarpanah,

Motahhare Keramatinia,

Elham Soroush

et al.

Surfaces and Interfaces, Journal Year: 2023, Volume and Issue: 41, P. 103144 - 103144

Published: July 6, 2023

Language: Английский

Citations

19
Efficient Hydrazine Electro‐Oxidation Achieved by Tailored Electron Injection into Fe (III) Sites Activating Dehydrogenation DOI Open Access

Shucong Zhang,

Xiaotong Wei,

Shuixing Dai

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(10)

Published: Nov. 21, 2023

Abstract Tailoring the d‐orbital electron of Fe (III) in oxyhydroxide is highly expected to realize an efficient hydrazine oxidation reaction (HzOR) for assisting seawater electrolysis. Although interface engineering can effectively change states on sites by charge injection or extraction, most interfaces have a directional electric field inaccessible regulation. Herein, combination iron and biphasic nickel phosphide established obtain dual built‐in (BEF) with opposite direction, which aims manipulate configuration sites, thereby optimizing binding strength activating N 2 H 4 intermediates. Both computational experimental analyses reveal that moderate Fe─*N originating from tailored plays key role accelerating dehydrogenation. Impressively, such promising promotion endows catalyst remarkable HzOR activity, realizing working potentials −8 44 mV 10 100 mA cm −2 alkaline seawater, respectively, achieving outstanding long‐term stability over h. production hybrid electrolyzer (HSE) requires dramatically low power consumption 16.4 Wh L −1 ≈100% Faraday efficiency. It believed work sheds new inspiration regulation obtaining advanced electrocatalysts.

Language: Английский

Citations

19
Linker-Dependent Stability of Metal-Hydroxide Organic Frameworks for Oxygen Evolution DOI
Daniel J. Zheng, Mikaela Görlin,

Kaylee McCormack

et al.

Chemistry of Materials, Journal Year: 2023, Volume and Issue: 35(13), P. 5017 - 5031

Published: June 26, 2023

Metal–organic frameworks (MOFs) are periodic organic–inorganic materials that have garnered considerable attention for electrocatalytic applications due to their wide tunability. Metal-hydroxide organic (MHOFs), a subset of MOFs combine layered metal hydroxides with ligands various π–π stacking energy, shown promising catalytic functions, such as the oxygen evolution reaction (OER). The long-term electrochemical stability these OER is unfortunately not well understood, which critical design practical devices. In this study, we investigated how Ni-based MHOFs composed two linkers different interaction strength (terephthalate; L1 and azobenzene-4,4′-dicarboxylate; L4) change function cycle number potential OER. All tested showed significant increases in electrochemically active Ni sites activity when cycled. constructed using stronger energy (L4) were observed remain intact bulk only near-surface transformations NiOOH2–x-like phases, whereas weaker (L1) complete reconstruction phases. This was confirmed X-ray diffraction, absorption spectroscopy, electron microscopy. Further, situ characterization Raman UV–vis revealed presence stable within MHOF structure suppresses Ni2+/Ni(3+δ)+ redox process. We further identify NiOOH2–x phase, while phase serves precatalyst. propose detailed mechanism transformation, provides valuable insights into future challenges both catalytically MOF-based water oxidation.

Language: Английский

Citations

18
Redox-active ligands enhance oxygen evolution reaction activity: Regulating the spin state of ferric ions and accelerating electron transfer DOI
Jing Liu, Zebin Yu, Jun Huang

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 650, P. 1182 - 1192

Published: July 17, 2023

Language: Английский

Citations

17
Real Active Site Identification of Co/Co3O4 Anchoring Ni-MOF Nanosheets with Fast OER Kinetics for Overall Water Splitting DOI
Haoran Yin,

Xinqiang Liu,

Lixia Wang

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(15), P. 7045 - 7052

Published: April 3, 2024

Doping metals and constructing heterostructures are pivotal strategies to enhance the electrocatalytic activity of metal–organic frameworks (MOFs). Nevertheless, effectively designing MOF-based catalysts that incorporate both doping multiphase interfaces poses a significant challenge. In this study, one-step Co-doped Co3O4-modified Ni-MOF catalyst (named Ni NDC-Co/CP) with thickness approximately 5.0 nm was synthesized by solvothermal-assisted etching growth strategy. Studies indicate formation Co–O–Ni–O-Co bond in NDC-Co/CP found facilitate charge density redistribution more than Co–O–Ni bimetallic synergistic effect NiCo NDC/CP. The designating achieved superior oxygen evolution reaction (OER) (245 mV @ 10 mA cm–2) robust long stability (100 h 100 1.0 M KOH. Furthermore, NDC-Co/CP(+)||Pt/C/CP(−) displays pregnant overall water splitting performance, achieving current cm–2 at an ultralow voltage 1.52 V, which is significantly lower commercial electrolyzer using Pt/C IrO2 electrode materials. situ Raman spectroscopy elucidated transformation NDC-Co Ni(Co)OOH under electric field. This study introduces novel approach for rational design OER electrocatalysts.

Language: Английский

Citations

8