Pt Nanoparticles Electrochemically Deposited onto Heteroatom-Doped Graphene Supports as Electrocatalysts for ORR in Acid Media DOI Creative Commons
Raegan Chambers, Sajid Hussain, Jekaterina Kozlova

и другие.

Journal of The Electrochemical Society, Год журнала: 2024, Номер 171(9), С. 096506 - 096506

Опубликована: Авг. 22, 2024

Platinum nanoparticles (PtNPs) are attached to different single heteroatom-doped (N, S, P, and B) dual B N, P) graphene nanosheets via electrochemical deposition using the chronoamperometric method, which allowed for strong attachment of PtNPs onto support surface. The effect material on electrocatalytic activity oxygen reduction reaction (ORR) in acidic media is examined. supported boron-doped exhibit highest specific (1.26 mA cm −2 ), nitrogen boron mass (0.70 A mg −1 ) at 0.9 V vs reversible hydrogen electrode. kinetics ORR vary significantly depending dopants, thus concluding that heteroatom doping affects toward ORR.

Язык: Английский

New and Revised Aspects of the Electrochemical Synthesis of Hydrogen Peroxide: From Model Electrocatalytic Systems to Scalable Materials DOI
Marco Mazzucato, Alessandro Facchin, Mattia Parnigotto

и другие.

ACS Catalysis, Год журнала: 2024, Номер 14(9), С. 6369 - 6403

Опубликована: Апрель 11, 2024

Hydrogen peroxide is a crucial commodity with wide range of applications in variety industrial processes, including disinfection and water treatment. With the neologism green H2O2, we can classify hydrogen produced by oxygen reduction or oxidation making use electricity obtained from renewable sources without emitting carbon dioxide into atmosphere. The production environmentally friendly H2O2 through reduction, even more so oxidation, currently impeded slow advancement efficient electrocatalysts, along lack suitable reactors. Nonetheless, realization producing within reach. In this regard, review paper aims to evaluate resume not only existing literature considering synthetic procedures performances different electrocatalysts but also put order clarify aspects relating mechanism role active sites various functional materials proposed (both as model system scalable one), while highlighting good practices for correct electrochemical screening thus obtaining reliable performance parameters. Hence, comprehensive evaluation catalysts, those based on noble metals, noble-metal-free, metal-free presented critically discussed. This encompasses activity selectivity considers sustainability perspective. A thorough assessment methods techniques detection quantification conducted, particular attention understanding applications: transitioning qualitative quantitative analysis involves employing unravel synthesis utilizing capable identifying quantifying environmental biomedical ones. emphasis potential cross-contamination between fields that, although distinct their aspects, may involve H2O2. Furthermore, an effort made emphasize technological advancements outline expectations development electrolyzers, taking consideration factors, rate conversion, accumulation, operating voltage.

Язык: Английский

Процитировано

20

Strong Metal‐Support Interactions through Sulfur‐Anchoring of Metal Catalysts on Carbon Supports DOI
Peng Yin, Qiangqiang Yan, Hai‐Wei Liang

и другие.

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(24)

Опубликована: Март 27, 2023

In supported metal catalysts, the supports would strongly interact with components instead of just acting as a carrier, which greatly affects both their synthesis and catalytic activity, selectivity, stability. Carbon is considered very important but inert support thus hard to induce strong metal-support interaction (SMSI). This mini-review highlights that sulfur-a documented poison reagent for catalysts-when doped in carbon can diverse SMSI phenomenon, including electronic (EMSI), classic SMSI, reactive (RMSI). These between sulfur-doped (S-C) enables catalysts extraordinary resistance sintering at high temperatures up 1100 °C, allows general single-atom, alloy cluster, intermetallic compound dispersion loading variety applications.

Язык: Английский

Процитировано

37

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials DOI
Sakthivel Kogularasu,

Yen‐Yi Lee,

Balasubramanian Sriram

и другие.

Angewandte Chemie, Год журнала: 2023, Номер 136(1)

Опубликована: Сен. 29, 2023

Abstract In the evolving field of electrocatalysis, thermal treatment nano‐electrocatalysts has become an essential strategy for performance enhancement. This review systematically investigates impact various treatments on catalytic potential nano‐electrocatalysts. The focus encompasses in‐depth analysis changes induced in structural, morphological, and compositional properties, as well alterations electro‐active surface area, chemistry, crystal defects. By providing a comprehensive comparison commonly used techniques, such annealing, calcination, sintering, pyrolysis, hydrothermal, solvothermal methods, this serves scientific guide selecting right technique favorable temperature to tailor optimal electrocatalysis. resultant modifications activity are explored across key electrochemical reactions (bio)sensing, degradation, oxygen reduction reaction, hydrogen evolution overall water splitting, fuel cells, carbon dioxide reaction. Through detailed examination underlying mechanisms synergistic effects, contributes fundamental understanding role enhancing electrocatalytic properties. insights provided offer roadmap future research aimed at optimizing nanomaterials, fostering development next‐generation sensors energy conversion technologies.

Язык: Английский

Процитировано

28

Rare Earth-Based Alloy Nanostructure for Hydrogen Evolution Reaction DOI

Yezi Lu,

Lulin Tang,

Ping Wang

и другие.

ACS Catalysis, Год журнала: 2023, Номер 13(20), С. 13804 - 13815

Опубликована: Окт. 12, 2023

Rare earth-based alloy nanostructures show great potential as materials in the hydrogen evolution reaction (HER), and they have a relatively negative enthalpy of formation compared to traditional transition metal alloys, which resist dissolution alloys reaction. In addition, liner relationship can be observed d-band filling electrochemical activity. Therefore, rare nanostructure contains advantages transmission catalysts performs better selectivity stability. However, reduction potentials earth (RE) group are relevantly low, typically less than −1.9 V, synthesis methods RE very important. this Perspective, we generalize preparation method their applications related Through recent research on reaction, future development direction is pointed out.

Язык: Английский

Процитировано

27

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials DOI
Sakthivel Kogularasu,

Yen‐Yi Lee,

Balasubramanian Sriram

и другие.

Angewandte Chemie International Edition, Год журнала: 2023, Номер 63(1)

Опубликована: Сен. 29, 2023

Abstract In the evolving field of electrocatalysis, thermal treatment nano‐electrocatalysts has become an essential strategy for performance enhancement. This review systematically investigates impact various treatments on catalytic potential nano‐electrocatalysts. The focus encompasses in‐depth analysis changes induced in structural, morphological, and compositional properties, as well alterations electro‐active surface area, chemistry, crystal defects. By providing a comprehensive comparison commonly used techniques, such annealing, calcination, sintering, pyrolysis, hydrothermal, solvothermal methods, this serves scientific guide selecting right technique favorable temperature to tailor optimal electrocatalysis. resultant modifications activity are explored across key electrochemical reactions (bio)sensing, degradation, oxygen reduction reaction, hydrogen evolution overall water splitting, fuel cells, carbon dioxide reaction. Through detailed examination underlying mechanisms synergistic effects, contributes fundamental understanding role enhancing electrocatalytic properties. insights provided offer roadmap future research aimed at optimizing nanomaterials, fostering development next‐generation sensors energy conversion technologies.

Язык: Английский

Процитировано

26

One-Pot Room Temperature Synthesis of Nitrogen-Doped Graphene and Its Application as Catalyst Support for ORR in PEMFCs DOI
R. Bhaskaran, Raghuram Chetty

ACS Applied Energy Materials, Год журнала: 2024, Номер 7(2), С. 390 - 402

Опубликована: Янв. 5, 2024

Catalyst durability is one of the crucial factors for large-scale commercialization proton-exchange membrane fuel cells (PEMFCs). Graphene a potential candidate catalyst support, among various alternatives, owing to its excellent properties, such as high surface area and stability. Its employment has, however, been limited due difficulties involved in production maintaining optimal functional groups Pt incorporation without compromising innate In this work, we synthesized functionalized multilayer graphene with situ nitrogen doping using simple, one-step electrochemical process at room temperature an eco-friendly source. We investigated parameters, electrolyte concentrations, synthesis conditions, need post-exfoliation procedures produce optimized support. Nitrogen up 10 at. % was obtained by increasing precursor concentration. performed ultrafast microwave-assisted polyol process. Uniform distribution average particle size <2 nm on When tested activity toward oxygen reduction reaction (ORR) acidic media, catalysts exhibited higher onset mass than commercial Pt/C catalyst. Accelerated degradation tests revealed electrochemically active retention compared commercially available Pt/C.

Язык: Английский

Процитировано

16

Efficient evaporation of seawater desalination by novel double-interface evaporator: Photothermal conversion, water transfer and salt-resistant DOI
Zhe Zhang,

Chuanyou Xie,

Yangyang Wang

и другие.

Separation and Purification Technology, Год журнала: 2024, Номер 354, С. 128698 - 128698

Опубликована: Июль 9, 2024

Язык: Английский

Процитировано

12

Pt-Based Ternary Alloy on Nanohoneycomb Nitrogen-Doped Carbon Support for Highly Active and Stable Oxygen Reduction Reaction DOI

Xiaoxiong Feng,

Zilong Zhou, Huijuan Zhang

и другие.

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 12, 2025

Язык: Английский

Процитировано

1

Pt NPs Supported on CeO2/C as Electrocatalysts for Oxygen Reduction Reaction: Novel Physicochemical Insights on the Synthesis and on the Improved Activity and Stability DOI Creative Commons
Mattia Parnigotto, Gregorio Dal Sasso, Enrico Berretti

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 5, 2025

Abstract This study emphasizes the effect of CeO 2 on Pt nanoparticle (NP) dimension, stability, and activity versus oxygen reduction reaction. It is demonstrated that one‐pot synthesis NPs along with over carbon support produces small (2 nm) higher activity, than sole NPs, thanks to cooperative interaction exerted by . nicely using synchrotron wide‐angle X‐ray total scattering advanced data analysis, monitoring in situ nucleation growth presence preformed or a Ce precursor. Raman, photoelectron spectroscopy, high‐resolution transmission electron microscopy analyses are carried out formation vacancies responsible for metal–support interaction. Moreover, most effective catalyst, PtCeO /C250 (mass activity: MA 0.9 V = 423 Ag −1 ; specific SA 446 µAcm −2 ), exhibits comparable commercial benchmark Pt/C, yet significantly greater stability as accelerated stress tests conducted gas diffusion electrode. Specifically, retains 62% ± 7% its 0.65 79% 9% , compared 43% 5% 7%, respectively, benchmark.

Язык: Английский

Процитировано

1

Carbon Encapsulation of Supported Metallic Iridium Nanoparticles: An in Situ Transmission Electron Microscopy Study and Implications for Hydrogen Evolution Reaction DOI
Panpan Liu, Alexander Klyushin,

Praveen Chandramathy Surendran

и другие.

ACS Nano, Год журнала: 2023, Номер 17(23), С. 24395 - 24403

Опубликована: Дек. 4, 2023

Carbon-supported metal nanoparticles (NPs) comprise an important class of heterogeneous catalysts. The interaction between the and carbon support influences overall material properties, viz., catalytic performance. Herein we use in situ ex transmission electron microscopy (TEM) combination with X-ray spectroscopy (XPS) to investigate encapsulation metallic iridium NPs by Ir/C catalyst. Real-time atomic-scale imaging visualizes particle reshaping increased graphitization upon heating vacuum. According TEM results, overcoating grows over Ir during process, starting from ca. 550 °C. With overlayers formed, no sintering migration is observed at 800 °C, yet initial sinter or below i.e., a temperature associated incomplete encapsulation. overlayer corrugates when decreased 200 °C this process surface reconstruction reversible, such that corrugated can be smoothed out increasing back performance (activity stability) encapsulated hydrogen evolution reaction (HER) higher than (nonencapsulated) state Ir/C. Overall, work highlights microscopic details currently understudied phenomenon supported noble demonstrates additionally effective measure for tuning

Язык: Английский

Процитировано

23