keyword
https://read.qxmd.com/read/38516081/-in-situ-nafion-nanofilm-oriented-002-zn-electrodeposition-for-long-term-zinc-ion-batteries
#1
JOURNAL ARTICLE
Da Zhang, Ziyang Song, Ling Miao, Yaokang Lv, Lihua Gan, Mingxian Liu
Dendrite growth and parasitic reactions of a Zn metal anode in aqueous media hinder the development of up-and-coming Zn-ion batteries. Optimizing the crystal growth after Zn nucleation is promising to enable stable cyclic performance of the anode, but directly regulating specific crystal plane growth for homogenized Zn electrodeposition remains highly challenging. Herein, a perfluoropolymer (Nafion) is introduced into an aqueous electrolyte to activate a thermodynamically ultrastable Zn/electrolyte interface for long-term Zn-ion batteries...
March 20, 2024: Chemical Science
https://read.qxmd.com/read/38511569/on-the-thermodynamic-equivalence-of-grand-canonical-infinite-size-and-capacitor-based-models-in-first-principle-electrochemistry
#2
REVIEW
Georg Kastlunger, Sudarshan Vijay, Xi Chen, Shubham Sharma, Andrew Peterson
First principles-based computational and theoretical methods are constantly evolving trying to overcome the many obstacles towards a comprehensive understanding of electrochemical processes on an atomistic level. One of the major challenges has been the determination of reaction energetics under a constant potential. Here, a theoretical framework was proposed applying standard electronic structure methods and extrapolating to the infinite-cell size limit where reactions do not alter the potential. Today, electronically grand canonical modifications to electronic structure methods, holding the potential constant by varying the number of electrons in a finite simulation cell, become increasingly popular...
March 21, 2024: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://read.qxmd.com/read/38494440/entropy-driven-direct-air-electrofixation
#3
JOURNAL ARTICLE
Yuntong Sun, Ming Li, Jingjing Duan, Markus Antonietti, Sheng Chen
According to the rule of chemical thermodynamics, the catalytic activation of small molecules (like N2 in air and CO2 in flue gas) generally exhibits a negative activity dependence on O2 owning to the competitive oxygen reduction reaction (ORR). Nevertheless, some catalysts can show positive activity dependence for N2 electrofixation, an important route to produce ammonia under ambient condition. Here we report that the positive activity dependence on O2 of (Ni0.20Co0.20Fe0.20Mn0.19Mo0.21)3S4 catalyst arises from high-entropy mechanism...
March 17, 2024: Angewandte Chemie
https://read.qxmd.com/read/38471957/-research-progress-in-electrochemical-detection-and-removal-of-micro-nano-plastics-in-water
#4
JOURNAL ARTICLE
Wei-Kang Zheng, Zhen-Zhong Liu, Xiao-Fang Xiang
Micro/nano plastics (M/NPs) are widely dispersed in the soil, atmosphere, and water environment due to their small particle size, easy adsorption, and strong migration, and have been detected in all major water bodies in recent years. As a type of emerging pollutant, the physiological toxicity of M/NPs has a great impact on human health. The current bottleneck in this research field lies in the precise detection and efficient removal of M/NPs. Electrochemical technology, owing to its advantages of simple portability, sensitivity, and low cost in the detection of M/NPs, has the advantages of environmental friendliness, controllable reaction, and high efficiency in the removal of M/NPs, demonstrating enormous application potential...
February 8, 2024: Huan Jing Ke Xue= Huanjing Kexue
https://read.qxmd.com/read/38454788/mechanistic-insights-into-the-discharge-processes-of-li-co2-batteries
#5
JOURNAL ARTICLE
Xinxin Zhang, Tingting Luo, Yu Wang, Yafei Li
Li-CO2 batteries correspond to renewable energy storage in a cost-effective, eco-friendly CO2 fixation manner. However, an inadequate understanding of their reaction mechanism severely impedes their development. Here we outline recent mechanistic advances in the discharge processes of Li-CO2 batteries, especially from the theoretical aspect. We first highlight the vital factors affecting the formation of discharge intermediates and a surface lithiation mechanism that may dominate the catalysts with weak CO2 adsorption...
March 7, 2024: Chemistry: a European Journal
https://read.qxmd.com/read/38439976/tuning-charge-transport-by-manipulating-concentration-dependent-single-molecule-absorption-configurations
#6
JOURNAL ARTICLE
Xia Long, Wangping Xu, Tingting Duan, Liyan Lin, Yandong Guo, Xiaohong Yan, Juexian Cao, Yong Hu
Understanding and tuning charge transport in molecular junctions is pivotal for crafting molecular devices with tailored functionalities. Here, we report a novel approach to manipulate the absorption configuration within a 4,4'-bipyridine (4,4'-BPY) molecular junction, utilizing the scanning tunneling microscope break junction technique in a concentration-dependent manner. Single-molecule conductance measurements demonstrate that the molecular junctions exhibit a significant concentration dependence, with a transition from high conductance (HC) to low conductance (LC) states as the concentration decreases...
March 15, 2024: IScience
https://read.qxmd.com/read/38426524/s-o-s-shape-orientation-and-size-tune-solvation-in-electrocatalysis
#7
JOURNAL ARTICLE
Alessandra Serva, Simone Pezzotti
Current models to understand the reactivity of metal/aqueous interfaces in electrochemistry, e.g., volcano plots, are based on the adsorption free energies of reactants and products, which are often small hydrophobic molecules (such as in CO2 and N2 reduction). Calculations played a major role in the quantification and comprehension of these free energies in terms of the interactions that the reactive species form with the surface. However, solvation free energies also come into play in two ways: (i) by modulating the adsorption free energy together with solute-surface interactions, as the solute has to penetrate the water adlayer in contact with the surface and get partially desolvated (which costs free energy); (ii) by regulating transport across the interface, i...
March 7, 2024: Journal of Chemical Physics
https://read.qxmd.com/read/38423336/techniques-for-recovery-and-recycling-of-ionic-liquids-a-review
#8
REVIEW
Ying Siew Khoo, Tommy Chandra Tjong, Jia Wei Chew, Xiao Hu
Due to beneficial properties like non-flammable, thermal stability, low melting point and low vapor pressure, ionic liquids (ILs) have gained great interest from engineers and researchers in the past decades to replace conventional solvents. The superior characteristics of ILs make them promising for applications in fields as wide-ranging as pharmaceuticals, foods, nanoparticles synthesis, catalysis, electrochemistry and so on. To alleviate the high cost and environmental impact of ILs, various technologies have been reported to recover and purify the used ILs, as well as recycling the ILs...
February 27, 2024: Science of the Total Environment
https://read.qxmd.com/read/38405393/multi-band-metasurface-driven-surface-enhanced-infrared-absorption-spectroscopy-for-improved-characterization-of-in-situ-electrochemical-reactions
#9
JOURNAL ARTICLE
Malo Duportal, Luca M Berger, Stefan A Maier, Andreas Tittl, Katharina Krischer
Surface-enhanced spectroscopy techniques are the method-of-choice to characterize adsorbed intermediates occurring during electrochemical reactions, which are crucial in realizing a green and sustainable future. Characterizing species with low coverage or short lifetimes has so far been limited by low signal enhancement. Recently, single-band metasurface-driven surface-enhanced infrared absorption spectroscopy (SEIRAS) has been pioneered as a promising technology to monitor a single vibrational mode during electrochemical CO oxidation...
February 21, 2024: ACS Photonics
https://read.qxmd.com/read/38396229/unlocking-the-potential-of-high-entropy-alloys-in-electrochemical-water-splitting-a-review
#10
REVIEW
Abrar Ahmad, Adeela Nairan, Zhuo Feng, Ruiming Zheng, Yelin Bai, Usman Khan, Junkuo Gao
The global pursuit of sustainable energy is focused on producing hydrogen through electrocatalysis driven by renewable energy. Recently, High entropy alloys (HEAs) have taken the spotlight in electrolysis due to their intriguing cocktail effect, broad design space, customizable electronic structure, and entropy stabilization effect. The tunability and complexity of HEAs allow a diverse range of active sites, optimizing adsorption strength and activity for electrochemical water splitting. This review comprehensively covers contemporary advancements in synthesis technique, design framework, and physio-chemical evaluation approaches for HEA-based electrocatalysts...
February 23, 2024: Small
https://read.qxmd.com/read/38392758/cement-sulfur-for-lithium-sulfur-cells
#11
JOURNAL ARTICLE
Tzu-Ming Hung, Cheng-Che Wu, Chung-Chan Hung, Sheng-Heng Chung
Lithium-sulfur batteries represent a promising class of next-generation rechargeable energy storage technologies, primarily because of their high-capacity sulfur cathode, reversible battery chemistry, low toxicity, and cost-effectiveness. However, they lack a tailored cell material and configuration for enhancing their high electrochemical utilization and stability. This study introduces a cross-disciplinary concept involving cost-efficient cement and sulfur to prepare a cement/sulfur energy storage material...
February 19, 2024: Nanomaterials
https://read.qxmd.com/read/38383697/fabricating-high-purity-graphite-disk-electrodes-as-a-cost-effective-alternative-in-fundamental-electrochemistry-research
#12
JOURNAL ARTICLE
Claudia Spallacci, Mikaela Görlin, Amol Kumar, Luca D'Amario, Mun Hon Cheah
Graphite electrodes offer remarkable electrochemical properties, emerging as a viable alternative to glassy carbon (GCE) and other carbon-based electrodes for fundamental electrochemistry research. We report the fabrication and characterization of high-purity graphite disk electrodes (GDEs), made from cost-effective materials and a solvent-free methodology employing readily available laboratory equipment. Analysis of their physical properties via SEM, EDX and XPS reveals no metallic interferences and a notably high porosity, emphasizing their potential...
February 21, 2024: Scientific Reports
https://read.qxmd.com/read/38340075/pka-as-a-predictive-descriptor-for-electrochemical-anion-adsorption
#13
JOURNAL ARTICLE
Mohammad H Hasan, Ian McCrum
The adsorption of anions onto metal surfaces is important in many applications including effective (electro)catalyst design, metal surface modification, and contaminant removal in wastewater treatment. In electrocatalysis, anions can be both reactive intermediates or site-blocking spectators, where their adsorption strength therefore dictates the rate of reaction. In this work, we have measured the adsorption energy of a series of carboxylic acids on a Pt (111) single-crystal electrode surface from aqueous solution...
February 10, 2024: Angewandte Chemie
https://read.qxmd.com/read/38337202/fabrication-of-mildew-resistant-wood-with-multi-functional-properties-based-on-in-situ-growth-of-metal-organic-frameworks
#14
JOURNAL ARTICLE
Xingyu Liang, Tao Zhang, Junting Li, Wei Wang, Tiancheng Yuan, Yanjun Li
Wood is easily affected by decay fungi, mildew fungi, insects, water, UV, and other factors when used outdoors. In particular, mildew on the surface of wood negatively affects the appearance and practical use of wood or wood-based engineered products. In recent years, as a class of popular crystalline materials, metal-organic frameworks (MOFs) have been widely applied in electrochemistry, adsorption, anti-mildew efforts, and other areas. In this study, we first grew a Co-based metal-organic framework (Co-MOF) in situ on a wood surface and subsequently converted the Co-MOF in situ into a cobalt-nickel double hydroxide layer, which formed micro- and nanohierarchical composite structures on the wood surface...
January 23, 2024: Polymers
https://read.qxmd.com/read/38303716/developing-a-novel-lithium-ion-battery-anode-material-via-thiol-functionalization-of-diatom-frustules-plus-ag-modification
#15
JOURNAL ARTICLE
Yuxin Chen, Hongchang Liu, Ze Shen, Kang Yang, Jinlan Xia, Peng Yuan, Zhenyuan Nie, Hongwei Liu, Jianping Xie
The biosilicification of diatoms allows for the customization of the synthesis of functionalized diatom frustules. The S active sites (-SH) on diatom frustules were created by adding the organic silicon sources tetramethoxysilane (TMOS) and (3-mercaptopropyl)trimethoxysilane (MPTMS). The mechanisms of adsorption-reduction and the indirect effects of S active sites on electrochemical performance were declared. The DBS@C-Ag-3 anode material sourced from the cultivation condition with a silicon source of TMOS:MPTMS = 3:1 shows the best comprehensive performance and delivers a discharge capacity of ∼660 mAh·g-1 after 1000 cycles at 1 A·g-1 ...
February 16, 2024: IScience
https://read.qxmd.com/read/38274064/a-ru-ruo-2-heterostructure-boosting-electrochemistry-assisted-selective-benzoic-acid-hydrogenation
#16
JOURNAL ARTICLE
Zifan Cao, Chenhui Wang, Yifan Sun, Menghui Liu, Wei Li, Jinli Zhang, Yan Fu
Electrocatalytic hydrogenation of benzoic acid (BA) to cyclohexanecarboxylic acid (CCA) at ambient temperature and pressure has been recognized as a promising alternative to thermal hydrogenation since water is required as the hydrogen source. So far, only a few Pt-based electrocatalysts have been developed in acidic electrolyte. To overcome the limitations of reactant solubility and catalyst corrosion, herein, carbon fiber-supported Ru electrocatalysts with abundant Ru/RuO2 heterojunctions were fabricated via cyclic electrodeposition between -0...
January 24, 2024: Chemical Science
https://read.qxmd.com/read/38241870/design-superhydrophobic-no-noble-metal-substrates-for-highly-sensitive-and-signal-stable-sers-sensing
#17
JOURNAL ARTICLE
Hongquan Xu, Yuchen Zhang, Zhong Wang, Yuehan Jia, Xiaotian Yang, Ming Gao
Surface-enhanced Raman spectroscopy (SERS) is an analytical technique with a broad range of potential applications in fields such as biomedicine, electrochemistry, and hazardous chemicals. However, it is challenging to develop SERS substrates that are both good sensitive and signal stable. Here we designed a superhydrophobic Nd doped MoS2 uniformly assembled on the activated carbon fiber cloth (CFC) to avoid the coffee ring effect and enrich the analyte, improving the enhancement factor (EF) to 3.9 × 109 and pesticide endosulfan (<10-10 ) analyte detection...
January 14, 2024: Journal of Colloid and Interface Science
https://read.qxmd.com/read/38226886/n-heterocyclic-carbene-adsorption-states-on-pt-111-and-ru-0001
#18
JOURNAL ARTICLE
Tianchi Zhang, Sonali B Khomane, Ishwar Singh, Cathleen M Crudden, Peter H McBreen
N-heterocyclic carbene ligands (NHCs) are increasingly used to tune the properties of metal surfaces. The generally greater chemical and thermal robustness of NHCs on gold, as compared to thiolate surface ligands, underscores their potential for a range of applications. While much is now known about the adsorption geometry, overlayer structure, dynamics, and stability of NHCs on coinage elements, especially gold and copper, much less is known about their interaction with the surfaces of Pt-group metals, despite the importance of such metals in catalysis and electrochemistry...
January 16, 2024: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/38224594/high-surface-area-mesoporous-sc-2-o-3-with-abundant-oxygen-vacancies-as-new-and-advanced-electrocatalyst-for-electrochemical-biomass-valorization
#19
JOURNAL ARTICLE
Yufeng Wu, Liyao Ma, Junxiu Wu, Mingwei Song, Changlong Wang, Jun Lu
Scandium oxide (Sc2 O3 ) is considered as omnipotent "Industrial Ajinomoto" and holds promise in catalytic applications. However, rarely little attention have been paid to its electrochemistry. Here, we reported the first nanocasting design of high-surface area Sc2 O3 with abundant oxygen vacancies (mesoporous VO -Sc2 O3 ) for efficient electrochemical biomass valorization. In the case of the electro-oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), quantitative HMF conversion, high yield and high faradic efficiency of 2,5-furandicarboxylic acid (FDCA) via the hydroxymethylfurancarboxylic acid (HMFCA) pathway were achieved by this advanced electrocatalyst...
January 15, 2024: Advanced Materials
https://read.qxmd.com/read/38158770/carboxylated-hexagonal-boron-nitride-graphene-configuration-for-electrosynthesis-of-high-concentration-neutral-hydrogen-peroxide
#20
JOURNAL ARTICLE
Zhixin Song, Xiao Chi, Shu Dong, Biao Meng, Xiaojiang Yu, Xiaoling Liu, Yu Zhou, Jun Wang
The electrosynthesis of hydrogen peroxide (H2O2) via two-electron (2e-) oxygen (O2) reduction reaction (ORR) has great potential to replace the traditional energy-intensive anthraquinone process, but the design of low-cost and highly active and selective catalysts is greatly challenging for the long-term H2O2 production under industrial relevant current density, especially under neutral electrolytes. To address this issue, this work constructed a carboxylated hexagonal boron nitride/graphene (h-BN/G) heterojunction on the commercial activated carbon through the coupling of B, N co-doping with surface oxygen groups functionalization...
December 29, 2023: Angewandte Chemie
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