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Although strong modulation of interfacial electron concentrations by the relative acidity of surface additives has been suggested, direct observation of corresponding changes in surface conductivity, crucial for understanding the role of…

材料科学 · 物理学 2025-05-21 Gyu Rac Lee , Thomas Defferriere , Jinwook Kim , Han Gil Seo , Yeon Sik Jung , Harry L. Tuller

The design and development of inexpensive highly efficient electrocatalysts for hydrogen production, underpins several emerging clean-energy technologies. In this work, for the first time, molybdenum disulfide (MoS2) nanodots have been…

材料科学 · 物理学 2015-07-02 John Benson , Meixian Li , Shuangbao Wang , Peng Wang , Pagona Papakonstantinou

The electrochemical corrosion rate of Magnesium (Mg) and Mg alloys depends on the stability of the formed surface layer. Based on the Mg substrate, the oxide structure comprises a dense MgO/Mg(OH)2 mixture underneath a porous plate-like…

In the present work, extended Argon ion bombardment was used to modify anatase TiO2 nanotube (NTs) layers. In situ X-ray photoelectron spectroscopy revealed a high content of sub-oxide formed (Ti3+, Ti2+ states) in the nanotube layers.…

材料科学 · 物理学 2016-10-14 Xuemei Zhou , Ning Liu , Patrik Schmuki

Irradiation of isolated water molecules by few-cycle pulses of intense infrared laser light can give rise to ultrafast rearrangement resulting in formation of the H2+ ion. Such unimolecular reactions occur on the potential energy surface of…

化学物理 · 物理学 2015-06-03 Manish Garg , Ashwani K. Tiwari , Deepak Mathur

In this study we report on the results from emission $^{57}$Fe M${\"o}$ssbauer Spectroscopy experiments, using dilute $^{57}$Mn implantation into pristine (TiO$_2$) and hydrogenated anatase held at temperatures between 300-700 K. Results of…

This paper devotes to formulating several multiscale models to study the effect of pH-dependent ionic inhomogeneity on the electrical potential distributions and the graded elastic properties of a nanoscale DNA film and the related bending…

应用物理 · 物理学 2017-06-27 Neng-Hui Zhang , Wei-Lie Meng , Cheng-Yin Zhang , Jun-Zheng Wu

We have systematically investigated the annealing effect on the superconductivity of iron chalcogenide Fe1+y(Te1-xSex). The atmospheres used for annealing include O2, N2, I2 vapor, air and vacuum. We observed that annealing in O2, I2 and…

超导电性 · 物理学 2012-11-07 J. Hu , G. C. Wang , B. Qian , Z. Q. Mao

For generation of sustainable, clean and highly efficient energy, the electrocatalytic oxygen evolution reaction represents an attractive platform, thus inviting immense research activities in recent years. However, designing the catalyst…

Electrochemical reduction is a promising way to make use of CO$_2$ as feedstock for generating renewable fuel and valuable chemicals. Several metals can be used in the electrocatalyst to generate CO and formic acid but hydrogen formation is…

This work reports the synthesis, the physicochemical characterization and the electrochemical studies of new electrocatalysts (ECs) for the oxygen reduction reaction (ORR) that: (i) are based on a hierarchical graphene-based support; and…

We investigate electron correlation effects in internuclear-distance-dependent enhanced ionization of $\mathrm{H}_2$, $\mathrm{LiH}$, and $\mathrm{HF}$ molecules by intense near-infrared laser pulses using a 3D description of the systems…

原子物理 · 物理学 2019-02-27 Siddhartha Chattopadhyay , Lars Bojer Madsen

The hybrid nanostructures of nitrogen doped carbon materials and nonprecious transition metals are among the most promising electrocatalysts to replace noble metal catalysts for renewable energy applications. However, the fundamental…

材料科学 · 物理学 2018-05-14 Wei Pei , Si Zhou , Yizhen Bai , Jijun Zhao

The last decade has witnessed the emergence of hydrovoltaic technology, which can harvest electricity from different forms of water movement, such as raindrops, waves, flows, moisture, and natural evaporation. In particular, the…

化学物理 · 物理学 2023-04-10 Chunxiao Zheng , Sunmiao Fang , Weicun Chu , Jin Tan , Bingkun Tian , Xiaofeng Jiang , Wanlin Guo

Aqueous radiation chemistry emerges through ultrafast proton transfer and ion-radical formation with unexplored energy-redistribution dynamics steering the subsequent reactions. We performed time-resolved disruptive probing on pure water…

The d-band center descriptor based on the adsorption strength of adsorbate has been widely used in understanding and predicting the catalytic activity in various metal catalysts. However, its applicability is unsure for the…

材料科学 · 物理学 2021-07-07 Wen Qiao , Shiming Yan , Deyou Jin , Xiaoyong Xu , Wenbo Mi , Dunhui Wang

This study combines surface-sensitive photoemission experiments with density functional theory (DFT) to give a microscopic description of H adsorption-induced modifications of the ZnO(10${\overline{1}}$0) surface electronic structure. We…

材料科学 · 物理学 2015-06-23 J. -C. Deinert , O. T. Hofmann , M. Meyer , P. Rinke , J. Stähler

The hydrogen-bonded structure of methanol-water mixtures is investigated over the entire alcohol concentration range (from $x_{\mathrm{Methanol}}=$ 0.1 to 1.0) at several temperatures, from 300 K down to the freezing point of the given…

化学物理 · 物理学 2023-07-07 Ildikó Pethes , László Pusztai , László Temleitner

Platinum, to date, is the most widely applied electrocatalyst for hydrogen evolution reaction (HER) in acidic media. It is assumed to be a proton-blocking catalyst with only surface-limited adsorption of the reaction intermediates. Here, we…

化学物理 · 物理学 2025-10-13 Aparna Saksena , Yujun Zhao , J. Manoj Prabhakar , Dierk Raabe , Baptiste Gault , Yug Joshi

Using the molecular dynamics method, dynamics of hydrogen bond (HB) networks emerging on the surface of a graphene sheet during its functionalization with hydroxyl groups OH are simulated. It is demonstrated that two OH groups form an…

介观与纳米尺度物理 · 物理学 2020-12-30 Alexander V. Savin