Journal of Materials Chemistry C, Год журнала: 2024, Номер unknown
Опубликована: Дек. 31, 2024
A Si/Co 3 O 4 /Au photocathode was obtained on pyramidal Si, which exhibited high and stable photoelectrocatalytic performance for hydrogen production. This work presents a promising approach the rational design of effective Si-based photocathodes.
Язык: Английский
Nanomaterials, Год журнала: 2025, Номер 15(2), С. 103 - 103
Опубликована: Янв. 10, 2025
In this work, a series of BaxMn0.7Cu0.3O3 samples (x: 1, 0.9, 0.8, and 0.7, BxMC) was synthesized, characterized, used as catalysts for CO oxidation reaction. All formulations were active in the tested conditions. A correlation between electrical conductivity, obtained by impedance spectroscopy, reducibility samples, H2-TPR, observed. The Ba0.8Mn0.7Cu0.3O3 composition (B0.8MC) showed best catalytic performance (comparable to that 1% Pt/Al2O3 reference sample) during tests conducted under conditions similar those found exhaust gases current gasoline engines. characterization data suggest simultaneous presence high Mn(IV)/Mn(III) surface ratio, oxygen vacancies, reduced copper species, these two latter being key properties ensuring conversion percentage both are sites oxidation. reaction temperature reactant atmosphere seem be most important factors achieving good performance, they strongly determine location stability species.
Язык: Английский
Процитировано
1
Ceramics International, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1
Опубликована: Янв. 1, 2025
Процитировано
1
Inorganic Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Март 4, 2025
The strong metal-support interaction (SMSI) in supported metal catalysts represents a crucial factor the design of highly efficient heterogeneous catalysts. This can modify surface adsorption state, electronic structure, and coordination environment metal, altering interface structure catalyst. These changes serve to enhance catalyst's activity, stability, reaction selectivity. In recent years, multitude researchers have uncovered range novel SMSI types induction methods including oxidized (O-SMSI), adsorbent-mediated (A-SMSI), wet chemically induced (Wc-SMSI). Consequently, systematic critical review is desirable illuminate latest advancements deliberate its application within article provides characteristics various most methods. It concluded that significantly contributes enhancing catalyst selectivity, increasing catalytic activity. Furthermore, this paper offers comprehensive extensive electrocatalysis hydrogen evolution (HER), oxygen (OER), reduction (ORR), carbon dioxide (CO2RR). Finally, opportunities challenges faces future are discussed.
Язык: Английский
Процитировано
1
Small, Год журнала: 2025, Номер unknown
Опубликована: Фев. 3, 2025
Abstract An efficient approach for fabrication of non‐noble metal‐based electrocatalyst is desirable designing the energy storage and conversion devices in real‐world usages due to low cost excellent catalytic properties. The preparation hollow carbon capsules (HCC) containing cobalt (Co)‐based reported by a simple synthesis process without using templates first time. Initially, phenylphosphonate (Co‐MOF) nanorods are fabricated through hydrothermal approach. as‐formed Co‐MOF covered with thin coating polydopamine (DP‐Co‐MOF) chemical polymerization dopamine Tris‐HCl (pH 8.5). DP‐Co‐MOF used as self‐degraded template formation HCC under pyrolysis. mechanism hydrogen evolution reaction (HER) activity investigated. structure derived N 2 exhibits overpotential (295 mV at 100 mA cm −2 ) stability (90.98%) 150 h, which further verified density functional theory (DFT) calculations. Finally, designed anion exchange membrane (AEM) water electrolyzer based on C─Co─N cathode delivers current 500 (at 2.19 V) 1000 mAcm 2.33 1.0 m KOH 60 °C. new Co‐based highly beneficial cost‐effective high‐performance AEMWEs.
Язык: Английский
Процитировано
1
Advanced Energy Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 19, 2024
Abstract Electrocatalytic water splitting is an attractive approach for large‐scale hydrogen generation, critical global carbon neutrality. However, the prevalent commercialized alkaline electrolysis generally conducted at low current densities due to sluggish kinetics and high overpotential, severely hampering high‐efficiency production. Exploration of evolution reaction (HER) electrocatalysts that can reliably operate ampere‐level under overpotentials thus a primary challenge. In contrast extensive studies using powdery electrocatalysts, self‐supported metallic catalytic cathode has become burgeoning direction toward densities, owing their integrated design with intensive interfacial binding, conductivity mechanical stability industrial tolerance/adaption. Recent years have witnessed tremendous research advances in designing electrocatalysts. Therefore, this flourishing area specially summarized. Beginning introduction theory mechanism HER, engineering strategies on electrodes are systematically summarized, including metal alloy construction, heterostructure engineering, doping manipulation, surface design. Meanwhile, particular emphasis focused relationship between structure, activity, HER. Finally, existing challenges, requirements industrial‐scale application, future aiming provide better solution electrolysis.
Язык: Английский
Процитировано
6
Nanomaterials, Год журнала: 2024, Номер 14(16), С. 1334 - 1334
Опубликована: Авг. 10, 2024
Mixed oxides featuring perovskite-type structures (ABO3) offer promising catalytic properties for applications focused on the control of atmospheric pollution. In this work, a series BaxMnO3 (x = 1, 0.9, 0.8 and 0.7) samples have been synthesized, characterized tested as catalysts CO oxidation reaction in conditions close to that found exhausts last-generation automotive internal combustion engines. All were observed be active during CO-TPRe tests, with Ba0.7MnO3 (B0.7M) being most one, it presents highest amount oxygen vacancies (which act sites oxidation) Mn (IV), which features levels reducibility best redox properties. B0.7M has also showcased high stability reactions at 300 °C, even though slightly lower conversion is achieved second consecutive cycle. This performance appears related decrease (IV)/Mn (III) ratio.
Язык: Английский
Процитировано
5
ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Янв. 12, 2025
Supported noble metal catalysts have a high catalytic activity and selectivity. However, fast surface reconstruction sintering of particles during high-temperature reaction process pose major challenge to the stability catalysts. In this study, sinter-resistant supported were prepared by constructing an oxide nanotrap. Pt/Al2O3 was used as research paradigm. Dopamine applied structure-directing agent pore-forming form porous CeO2 overlay on encapsulate Pt nanoparticles. Due confinement its interaction with Pt, modified Pt/Al2O3@CeO2 exhibits superior antisintering stability. This method can be extended other catalyst systems.
Язык: Английский
Процитировано
0
Journal of Industrial and Engineering Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Materials Science in Semiconductor Processing, Год журнала: 2025, Номер 190, С. 109338 - 109338
Опубликована: Янв. 31, 2025
Язык: Английский
Процитировано
0