Enhanced Urea Oxidation Reaction Through Layered Double Hydroxides: Insights From ZIF‐67‐Derived Nanostructures DOI Creative Commons
Yuri Jeon, Jury J. Medvedev,

Yeeun Seong

et al.

EcoMat, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

ABSTRACT Layered double hydroxides (LDHs) are ionic layered compounds characterized by anion‐containing intermediate regions within positively charged brucite‐like layers. LDHs have shown high electrochemical activity in energy conversion systems such as batteries and fuel cells. In this study, we developed a hierarchically porous nanostructure derived from zeolitic imidazolate framework‐67, which was subsequently transformed into an LDH structure with varying Ni concentrations. We precisely controlled the Ni‐to‐Co ratio investigated how different mole fractions of Co influence catalytic selectivity for urea oxidation reaction (UOR). structures low content (up to 40%) demonstrated O 2 due their structural instability predominant oxygen evolution (OER) originating ZIF‐67. contrast, (over 60%) supressed OER exhibited enhanced UOR. The resulting hollow expanded electrochemically active surface could improve mass transport diffusion at electrode interface, leading better kinetics higher current densities. These findings provide foundational design guideline metal–organic framework‐derived image

Language: Английский

Enhancing Water Electrolysis through Interfacial Design of Nickel Foam DOI
Lingling Sun, Yi Zeng, Jitao Li

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Water electrolysis recognizes nickel foam (NF) as an effective current collector due to its excellent conductivity. However, recent studies highlighted NF's effect on the efficacy of various electrocatalytic reactions, primarily presence electroactive chemical species at interface. In contrast, numerous reports suggested that NF has a negligible impact overall activity. When evaluated against other collectors, NF-supported catalysts demonstrate better electrochemical activity, predominantly interfacial design. This study presents electrochemically relevant with flexible design, supported by case and insights into promising future directions. Perspective reveals advantages, challenges, applicability design context water splitting in mind.

Language: Английский

Citations

1
Engineering gradient porous substrates of Fe2O3/NiO for enhanced electrocatalytic hydrogen production DOI

Juan Yu,

Shuai Zhao, Shun Lu

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 635, P. 236526 - 236526

Published: Feb. 18, 2025

Language: Английский

Citations

0
Partial sulfurization enabled SO42- decorated NiFe2O4 for enhanced electrocatalytic urea oxidation DOI
Jiang Liu, Xiulin Wu,

YinQiang Yin Shu

et al.

Materials Science and Engineering B, Journal Year: 2025, Volume and Issue: 317, P. 118228 - 118228

Published: March 19, 2025

Language: Английский

Citations

0
Portable Electroanalytical Platform Based on Eco-Friendly Biomass-Based Hydrogels with Bimetallic MOF Composites for Trace Acetaminophen Determination DOI
Junyan Liu,

Wang Sun,

Guorong Sun

et al.

ACS Biomaterials Science & Engineering, Journal Year: 2024, Volume and Issue: 11(1), P. 649 - 660

Published: Dec. 18, 2024

Accurate acetaminophen (APAP) determination using smartphone-based portable sensing hinges on developing interfaces with effective catalytic performance and high electron transfer efficiency. Herein, we report that various Ni-based bimetallic-organic framework materials (MOFs) were synthesized through the hydrothermal method. These MOFs incorporated multiwalled carbon nanotubes (MWCNTs) during synthesis of chitosan-cationic guar gum hydrogels (HG). The resulting composite conductive hydrogel features a distinctive three-dimensional network structure large specific surface area, enhancing APAP enrichment electrocatalytic activity. Among them, CuNi-MOF-based (CHG/CuNi-MOF) has most desirable capability as signal amplifier. Under optimal conditions, sensor constructed screen-printed electrode (SPE) CHG/CuNi-MOF (CHG/CuNi-MOF/SPE) wide detection range (0.07–1500 μM), low limit (0.023 relatively sensitivity (0.0450 μA·μM–1·cm–2) for determination. In addition, CHG/CuNi-MOF/SPE good stability, repeatability anti-interference properties, which make it possible to achieve selective targets in complex analysis ultimately obtain satisfactory recoveries (97.6–104.2%). This work successfully proves feasibility application MOFs-based electrochemical phenolics actual samples.

Language: Английский

Citations

3
Enhanced Urea Oxidation Reaction Through Layered Double Hydroxides: Insights From ZIF‐67‐Derived Nanostructures DOI Creative Commons
Yuri Jeon, Jury J. Medvedev,

Yeeun Seong

et al.

EcoMat, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

ABSTRACT Layered double hydroxides (LDHs) are ionic layered compounds characterized by anion‐containing intermediate regions within positively charged brucite‐like layers. LDHs have shown high electrochemical activity in energy conversion systems such as batteries and fuel cells. In this study, we developed a hierarchically porous nanostructure derived from zeolitic imidazolate framework‐67, which was subsequently transformed into an LDH structure with varying Ni concentrations. We precisely controlled the Ni‐to‐Co ratio investigated how different mole fractions of Co influence catalytic selectivity for urea oxidation reaction (UOR). structures low content (up to 40%) demonstrated O 2 due their structural instability predominant oxygen evolution (OER) originating ZIF‐67. contrast, (over 60%) supressed OER exhibited enhanced UOR. The resulting hollow expanded electrochemically active surface could improve mass transport diffusion at electrode interface, leading better kinetics higher current densities. These findings provide foundational design guideline metal–organic framework‐derived image

Language: Английский

Citations

0