Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158666 - 158666
Published: Dec. 1, 2024
Language: Английский
Chemical Communications, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Polymer electrolyte membrane fuel cells (PEMFCs) are one of the most promising energy conversion devices due to their high efficiency and zero emission; however, two major challenges, cost short lifetime, have been hindering commercialization cells. Achieving low-Pt or non-precious metal oxygen reduction reaction (ORR) electrocatalysts is main research ideas in this field. In review, degradation mechanism Pt-based catalysts firstly explained elucidated, then five strategies suggested for Pt usage without loss activity durability: modulation metal-support interactions, optimization local ionomers mass transport, composition, structure, multi-site synergistic effects. For carbon-based catalysts, problems challenges faced by heteroatom/transition-metal doped discussed, several improve carbon suggested. Particularly, an innovative quantum well catalyst structure reported quite recently presented which may open up new prospects development cell technology. Finally, review concludes with a brief conclusion future electrocatalysts.
Language: Английский
Citations
1
Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 8, 2025
Electrocatalytic glycerol oxidation reaction (GOR) to produce high-value formic acid (FA) is hindered by high formation potential of active species and sluggish C-C bond cleavage kinetics. Herein, Ni single-atom (NiSA) Co (CoSA) dual sites anchored on nitrogen-doped carbon nanotubes embedded with Ni0.1Co0.9 alloy (Ni0.1Co0.9@NiSACoSA-NCNTs) are constructed for electrochemical GOR. Remarkably, it can reach 10 mA cm-2 at a low 1.15 V versus the reversible hydrogen electrode (vs. RHE) realize formate selectivity 93.27 % even conversion 98.81 1.45 vs. RHE. The GOR mechanism pathway systematically elucidated via experimental analyses theoretical calculations. It revealed that hydroxyl (*OH) be produced during NiSA, CoSA, synergistically optimizes electronic structure CoSA sites, reducing energy barriers *OH-mediated bonds dehydrogenation C1 intermediates. This decreases number intermediates steps GOR-to-FA, thus increasing production efficiency. After coupling evolution in membrane assembly cell, 14.26 g 23.10 L H2 100 108 h.
Language: Английский
Citations
1
Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)
Published: March 13, 2025
Abstract The state-of-the-art anion-exchange membrane water electrolyzers (AEMWEs) require highly stable electrodes for prolonged operation. stability of the electrode is closely linked to effective evacuation H 2 or O gas generated from surface during electrolysis. In this study, we prepared a super-hydrophilic by depositing porous nickel–iron nanoparticles on annealed TiO nanotubes (NiFe/ATNT) rapid outgassing such nonpolar gases. NiFe/ATNT exhibited an overpotential 235 mV at 10 mA cm −2 oxygen evolution reaction in 1.0 M KOH solution, and was utilized as anode AEMWE achieve current density 1.67 A 1.80 V. addition, with electrode, which enables outgassing, showed record 1500 h 0.50 under harsh temperature conditions 80 ± 3 °C.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 1, 2024
Abstract Many existing research focuses on the differences or performance comparisons between single‐atom small‐sized nanocluster catalysts, but there is a lack of comprehensive coupling relationship structure and activity mechanism synergy. This study investigates combined catalytic potential cobalt single atoms (SAs) nanoclusters (NCs) for enhanced peroxymonosulfate (PMS) activation to degrade norfloxacin (NFX). A novel Co SAs‐NCs /CN/TiO 2 catalyst synthesized, featuring SAs NCs uniformly dispersed carbon film wrapping TiO , degradation efficiency NFX solution almost completely degraded, with mineralization rate 76.35%. Density functional theory (DFT) calculations indicate that synergistic interaction promotes more efficient PMS adsorption significantly reduces energy barrier, which enhances electron transfer increases reactive oxygen species (ROS) generation. highlights robust versatile nature this system in addressing various contaminants. elucidates providing new ideas advanced oxidation processes (AOPs) environmental remediation, linking emphasizes practicality importance effectively long‐term remediation water pollutants.
Language: Английский
Citations
7
eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100332 - 100332
Published: Nov. 1, 2024
Language: Английский
Citations
4
Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 8, 2025
Abstract Electrocatalytic glycerol oxidation reaction (GOR) to produce high‐value formic acid (FA) is hindered by high formation potential of active species and sluggish C−C bond cleavage kinetics. Herein, Ni single‐atom (Ni SA ) Co (Co dual sites anchored on nitrogen‐doped carbon nanotubes embedded with 0.1 0.9 alloy @Ni ‐NCNTs) are constructed for electrochemical GOR. Remarkably, it can reach 10 mA cm −2 at a low 1.15 V versus the reversible hydrogen electrode (vs. RHE) realize formate selectivity 93.27 % even conversion 98.81 1.45 vs. RHE. The GOR mechanism pathway systematically elucidated via experimental analyses theoretical calculations. It revealed that hydroxyl (*OH) be produced during , synergistically optimizes electronic structure sites, reducing energy barriers *OH‐mediated bonds dehydrogenation C 1 intermediates. This decreases number intermediates steps GOR‐to‐FA, thus increasing production efficiency. After coupling evolution in membrane assembly cell, 14.26 g 23.10 L H 2 100 108 h.
Language: Английский
Citations
0
ACS Catalysis, Journal Year: 2025, Volume and Issue: 15(3), P. 1477 - 1486
Published: Jan. 9, 2025
Electronic perturbation induced by the microenvironment regulation adjacent to FeN4 sites anchored on metal–N–C materials will accelerate its oxygen reduction reaction (ORR) kinetics. Herein, we report a fine-tuning in charge configuration of through defect-rich N/S-doped carbon nest derived from chemically cross-linked pyrrole/thiophene copolymer (CCPPT) with sp3-hybridized cross-linker. Compared (PPT) without cross-linker, CCPPT knitted three-dimensional (3D) network delivers higher defect density and ∼2-fold sulfur retention after pyrolysis. The structural characterizations combined theoretical calculations suggest that vacancy defects (Cvd) FeN4/S2 moiety together induce redistribution resultant CC-Fe1/NSC CCPPT, reducing adsorption strength oxygen-containing intermediates energy barrier ORR. As expected, shows an impressive half-wave potential ∼0.91 V vs reversible hydrogen electrode (RHE), surpassing both PPT-derived Fe1/NSC (0.88 V) commercial Pt/C (0.86 V). This work provides distinctive path manipulate single-atom catalysts toward ORR or even beyond.
Language: Английский
Citations
0
Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Language: Английский
Citations
0
ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 2434 - 2458
Published: Jan. 27, 2025
Subnanometric supported metal atomic clusters (SMACs) composed of several to tens surface atoms have attracted increased research interest in electrocatalysis. SMACs been known show distinct properties compared their nanoparticles and single atom counterparts long developed for functional improvements. Tremendous advancements made the past few years, with a notable trend more precise design down an atomic/molecular level investigation transferring into practical devices, which motivates this timely review. To begin, review presents classifies classic latest synthetic strategies state-of-the-art characterization techniques SMACs. It then outlines discusses basic structure principles SMACs, highlighting importance organic ligands, size effect clusters, support-cluster interactions determining catalytic activity device stability. Thereafter, recent advances typical electrocatalysis processes from laboratory scale industrial are discussed obtain general understanding structure–activity correlations Current challenges future perspectives emerging field also discussed, aiming at practicing SMAC catalysts energy conversion devices.
Language: Английский
Citations
0
Molecules, Journal Year: 2025, Volume and Issue: 30(3), P. 630 - 630
Published: Jan. 31, 2025
As an energy carrier characterized by its high density and eco-friendliness, hydrogen holds a pivotal position in transition. This paper elaborates on the scientific foundations recent progress of photo- electro-catalytic water splitting, including corresponding mechanism, material design optimization, economy production. It systematically reviews research photo(electro)catalytic materials, oxides, sulfides, nitrides, noble metals, non-noble metal, some novel photocatalysts provides in-depth analysis strategies for optimizing these materials through design, component adjustment, surface modification. In particular, it is pointed out that nanostructure regulation, dimensional engineering, defect introduction, doping, alloying, functionalization can remarkably improve catalyst performance. The importance adjusting reaction conditions, such as pH addition sacrificial agents, to boost catalytic efficiency also discussed, along with comparison cost-effectiveness different production technologies. Despite significant advancements made splitting technology, this highlights challenges faced field, development more efficient stable photo(electro)catalysts, improvement system conversion efficiency, cost reduction, promotion technology industrialization, addressing environmental issues.
Language: Английский
Citations
0