Results 161 to 170 of about 272 (215)

Near‐Unity Selectivity Inversion Between CO2 Electroreduction and H2 Evolution via Atomic Coordination Editing

Advanced Science, EarlyView.
Atomic coordination editing functions as an on/off switch that toggles single‐atom catalysts between CO2 electroreduction and hydrogen evolution. ABSTRACT Precise atomic coordination editing of single‐atom catalysts (SACs) provides an effective strategy to tune their electronic structures and catalytic selectivity. Yet, achieving near‐unity selectivity
Yukun Zhao, Yuanyuan He, Mengyu Duan, Peng Yin, Jinxing Chen, Xu Han, Jie Yang, Yulin Wang, Xingjie Fu, Shibo Xi, Chuncheng Chen, Jiong Lu   +11 more
wiley   +1 more source

Multiferroic‐Centric Materials and Systems Engineering for Battery Applications: An Insight Into Mechanisms, Strategies, and Characterizations

Advanced Science, EarlyView.
Multiferroic order parameters – polarization, magnetization, and ferroelastic strain – are positioned as dynamic design variables for batteries. Their mechanistic roles, practical tuning through fabrication and external fields, and ferroic‐resolved characterization routes are unified into a closed‐loop framework, revealing how coupled ferroic responses
Jiaqi Su, Yanda Zhu, Hao Peng, Manman Li, Xuzihan Zhang, Meixiao Wu, Siyuan Zhang, Yuhan Zeng, Jiwen Liao, Ming Luo, Hetaishan Huang, Yutong Wang, Sean Li, Wenxian Li   +13 more
wiley   +1 more source

Recent Advances in Carbon Cathode Materials toward High‐Performing Zinc‐Ion Hybrid Supercapacitors

Advanced Science, EarlyView.
Aqueous zinc‐ion hybrid supercapacitors (ZHSCs) have emerged as promising next‐generation electrochemical energy‐storage devices. Porous carbon materials have been extensively studied as cathodes, with advances in tailoring pore structures and material properties to enhance performance.
Take Hirooka, Zhaolin Liu, Ivan P. Parkin, Guanjie He   +3 more
wiley   +1 more source

Halide Perovskite: A Rich Source of Thermal Insulator

Advanced Science, EarlyView.
Halide perovskites exhibit ultralow thermal conductivity driven by intrinsic lattice softness and strong anharmonicity, falling below conventional defect‐engineering limits. Weak metavalent bonding, A‐site rattling, and dynamic octahedral tilting drive phonon scattering to the Ioffe–Regel limit, where wave‐like tunneling replaces particle‐like ...
Haolin Ye, Bangzhi Ge, Yuan Yu, Chongjian Zhou   +3 more
wiley   +1 more source

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Symmetric hydrogen bonds in ice X

Physics Letters, Section A: General, Atomic and Solid State Physics, 1984
Abstract Raman measurements on Ice VIII under pressures up to 50 GPa reveal strong line shifts, changes in isotope frequency ratio, intensity decreases, and the appearance of one new line around 38 GPa. These observations are consistent with the formation of symmetric hydrogen bonds and a new phase, Ice X, with cuprit structure.
W B Holzapfel
exaly   +2 more sources

Quantum Symmetrization of Hydrogen Bonds in Ice

JETP Letters, 2021
The structure of hydrogen bonds in ice is considered theoretically taking into account the quantum tunneling of protons along the bonds and the Coulomb interaction of protons of different bonds. It is shown that the width and height of the potential barrier become very small at sufficiently small hydrogen-bond lengths and the tunneling of protons along
I. A. Ryzhkin, M. I. Ryzhkin
openaire   +1 more source

Symmetric hydrogen bonding in dimethylammonium hydrogen diphenyldiphosphonate

Acta Crystallographica Section C Crystal Structure Communications, 2006
In the title compound, C2H8N+.C12H11O5P2-, pairs of hydrogen diphenyldiphosphonate anions form dimers across a twofold axis, with two symmetric O...H...O hydrogen bonds [O...O = 2.406 (3) and 2.418 (3) A]. The 12-membered ring thus formed has crystallographic 2 and quasi-222 symmetry.
Brandy H, Courtney, Booker W O, Juma, Steven F, Watkins, Frank R, Fronczek, George G, Stanley   +4 more
openaire   +2 more sources

Vibrational Analysis of the Hydrogen-Bond Symmetrization in Ice

The Journal of Physical Chemistry B, 2010
This paper presents a calculation of the vibrational spectra of hydrogen atoms and the probability distributions for protons along the hydrogen bonds to study the hydrogen-bond symmetrization in ice by performing ab initio molecular dynamics simulations.
Xue Z, Lu, Ying, Zhang, Peng, Zhao, Shao J, Fang   +3 more
openaire   +2 more sources

A hydrogen-bonded `trimer' of two symmetric dipyridones

Acta Crystallographica Section C Crystal Structure Communications, 2001
The isomers 3,3'-(1,2-ethynediyl)bis(2-pyridone), (I), and 6,6'-(1,2-ethynediyl)bis(2-pyridone), (II), were designed to form a hydrogen-bonded pair through alignment of their complementary cyclic lactam moieties. Instead, an equimolar mixture of (I) and (II) dissolved in methanol produced crystals of 3,3'-(1,2-ethynediyl)bis(2-pyridone)-6,6'-(1,2 ...
E F, Maverick, P L, Wash, D A, Lightner
openaire   +2 more sources

Intramolecular Hydrogen Bonding in Symmetric Dipyrrylmethanes

Spectroscopy Letters, 1995
Abstract Symmetric dipyrrylmethanes were prepared by converting ethyl 5-methylpyrrole-2-carboxylates into corresponding 5-methyl substituted pyrroles oxidized by bromine, and then self-condensed without separation and purification. The N-H H NMR analysis and molecular conformation computation revealed that strong intramolecular hydrogen bondings exist ...
Jinshi Ma, Qingqi Chen, Lingjiang Cheng, Changqi Wang, Shen Jin   +4 more
openaire   +1 more source