In situ Raman Monitoring of Surface Structures and Oxygen Species on Ni(OH)2/Au/Nickel Foam During Oxygen Evolution Reaction DOI

Xiaocong Ma,

Zhou Yu,

Yali Zhang

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(46), P. 19736 - 19742

Published: Nov. 12, 2024

Nickel foam is a prevalent material for the oxygen evolution reaction (OER) in alkaline media. Herein, we employed one-step electrodeposition technique to effectively fabricate Ni(OH)2/Au/nickel (denoted as Ni(OH)2/Au/NF) catalyst. This catalyst exhibits both surface-enhanced Raman scattering (SERS) activity and catalytic activity. The electrochemical SERS situ monitoring of surface structure changes intermediates during OER process. molecular evidence reveals that electro-driven initial Ni(OH)2 first becomes disordered finally oxidized NiOOH. When occurs, active species NiOO* observed release O2. Compared with bare NF, more NiOOH from Ni(OH)2/Au/NF has greater These findings significantly advance understanding mechanism on Ni-based catalysts, providing guidelines elaboration optimization future systems.

Language: Английский

Surface-Enhanced Raman Spectroscopy for the Detection of Reactive Oxygen Species DOI

Dongchang Yang,

Brian Youden,

Naizhen Yu

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Reactive oxygen species (ROS) play fundamental roles in various biological and chemical processes nature industries, including cell signaling, disease development aging, immune defenses, environmental remediation, pharmaceutical syntheses, metal corrosion, energy production, etc. As such, their detection is of paramount importance, but accurate identification quantification are technically challenging due to transient with short lifetimes low steady-state concentrations. a highly sensitive selective analytical technique, surface-enhanced Raman spectroscopy (SERS) promising for detecting ROS real-time, enabling situ monitoring ROS-involved electrochemical biochemical events exceptional resolution. This review provides comprehensive analysis the state-of-the-art SERS-based ROS. Herein, principles sensing mechanisms SERS have been critically evaluated, highlighting emerging applications direct indirect systems. The developments reaction schemes probes superoxide (•O2–), hydroxyl radicals (•OH), nitric oxide (•NO), peroxynitrite (ONOO–), hypochlorite (OCl–) presented. Finally, technical challenges future research directions discussed guide design analysis.

Language: Английский

Citations

1
Dynamic regulation of ferroelectric polarization using external stimuli for efficient water splitting and beyond DOI
Sundaram Chandrasekaran, Qingping Wang, Qiong Liu

et al.

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Regulating the ferroelectric polarization in catalysts is an emerging strategy to advance water splitting reactions, with merits of high charge transfer rate, creation real active sites, and optimizing chemisorption energy.

Language: Английский

Citations

1
A Practical Inverse Design Approach for High-Entropy Catalysts with Generative AI DOI Creative Commons
Jun Jiang, Donglai Zhou,

Ruyu Yang

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Abstract The vast compositional space of high-entropy materials offers unprecedented opportunities for the development powerful catalysts. However, their inverse design remains unfeasible due to lack robust theoretical frameworks and high-throughput experimental tools. This study demonstrates a practical approach that integrates spectroscopic descriptors, generative machine learning, robotic platform synthesize optimize catalyst composition oxygen evolution reaction (OER). automated system significantly accelerated catalysts validation, reducing time required synthesis, characterization performance testing from approximately 20 hours only 78 minutes per sample. Following rapid screen efficient senary catalysts, model further optimized top-performing candidate, lowering its overpotential at 10 mA/cm2 by an additional 32 mV. Our findings are testament potential incorporates descriptors into learning accelerate discovery. Moreover, this is also expected drive intelligent high-performance complex materials.

Language: Английский

Citations

0
DNA Origami-Assembled Gold Nanobipyramid Dimer Electrocatalyst for Ultrahigh Oxygen Evolution Reaction Activity DOI

Charanleen Kaur,

Imtiaz Ahmed, Krishna Kanta Haldar

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1749 - 1761

Published: Jan. 21, 2025

In recent years, the oxygen evolution reaction (OER) has garnered considerable attention as a pivotal process for water electrolysis. The progress of this hinges on efficacy catalyst. present study, role DNA origami-assembled gold nanobipyramid (Au NBP) dimer structure was explored initiating electrocatalytic activity water-splitting reaction. Through strategic integration origami technology and Au NBPs, study aims to orchestrate precise modulation electrocatalyst architecture achieve unprecedented levels in OER. NBP catalyst exhibits lowest overpotential 146 mV at current density 10 mAcm–2 compared with its various constituents. configuration optimizes exposure catalytically active sites promotes efficient charge transfer pathways due presence origami. This endeavors unlock new frontiers material design, paving way toward sustainable energy technologies enhanced efficiency scalability.

Language: Английский

Citations

0
Sodium Sulfite Intercalation in Ni–Fe Layered Double Hydroxide Nanosheets to Form Oxygen Vacancies for Electrocatalytic Oxidation of Water DOI
Longfang Ren, Yutao Wei, Sijie Yu

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Language: Английский

Citations

0
Development in Photoelectrochemical Water Splitting Using Carbon-Based Materials: A Path to Sustainable Hydrogen Production DOI Creative Commons
Asim Jilani, Hussameldin Ibrahim

Energies, Journal Year: 2025, Volume and Issue: 18(7), P. 1603 - 1603

Published: March 23, 2025

Hydrogen production via water splitting is a crucial strategy for addressing the global energy crisis and promoting sustainable solutions. This review systematically examines water-splitting mechanisms, with focus on photocatalytic electrochemical methods. It provides in-depth discussions charge transfer, reaction kinetics, key processes such as oxygen evolution (OER) hydrogen (HER). Various electrode synthesis techniques, including hydrothermal methods, chemical vapor deposition (CVD), pulsed laser (PLD), radio frequency sputtering (RF), are reviewed their advantages limitations. The role of carbon-based materials graphene, biochar, graphitic carbon nitride (g-C3N4) in photoelectrochemical (PEC) also highlighted. Their exceptional conductivity, tunable band structures, surface functionalities contribute to efficient separation enhanced light absorption. Further, advancements heterojunctions, doped systems, hybrid composites explored ability improve PEC performance by minimizing recombination, optimizing electronic increasing active sites reactions. Key challenges, material stability, cost, scalability, solar spectrum utilization, critically analyzed, along emerging strategies novel approaches development. By integrating materials, this comprehensive perspective production, bridging previously isolated research domains.

Language: Английский

Citations

0
Advances in Ru-based Acidic OER Electrocatalysts: Addressing the Activity-Stability Trade-off DOI Creative Commons
Yurui Wang, Yang Liu, Jinqiang Zhang

et al.

Published: April 1, 2025

Language: Английский

Citations

0
Toward Finding the Role of Surface Iron Ions in Enhancing Oxygen-Evolution Reaction DOI
Mohammad Khateri, Mohammad Mahdi Najafpour

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 17, 2024

The oxygen evolution reaction (OER) in alkaline media is crucial for energy conversion technologies, and Fe-based catalysts have garnered significant attention their efficacy. In this study, we provide an investigation of under OER conditions using some techniques. Our findings reveal minimal structural alterations the bulk FeH

Language: Английский

Citations

2
In situ Raman Monitoring of Surface Structures and Oxygen Species on Ni(OH)2/Au/Nickel Foam During Oxygen Evolution Reaction DOI

Xiaocong Ma,

Zhou Yu,

Yali Zhang

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(46), P. 19736 - 19742

Published: Nov. 12, 2024

Nickel foam is a prevalent material for the oxygen evolution reaction (OER) in alkaline media. Herein, we employed one-step electrodeposition technique to effectively fabricate Ni(OH)2/Au/nickel (denoted as Ni(OH)2/Au/NF) catalyst. This catalyst exhibits both surface-enhanced Raman scattering (SERS) activity and catalytic activity. The electrochemical SERS situ monitoring of surface structure changes intermediates during OER process. molecular evidence reveals that electro-driven initial Ni(OH)2 first becomes disordered finally oxidized NiOOH. When occurs, active species NiOO* observed release O2. Compared with bare NF, more NiOOH from Ni(OH)2/Au/NF has greater These findings significantly advance understanding mechanism on Ni-based catalysts, providing guidelines elaboration optimization future systems.

Language: Английский

Citations

1