Ion Structure Transition Enhances Charging Dynamics in Subnanometer Pores

ACS Nano ◽  
2020 ◽  
Vol 14 (2) ◽  
pp. 2395-2403 ◽  
Author(s):  
Tangming Mo ◽  
Sheng Bi ◽  
Yuan Zhang ◽  
Volker Presser ◽  
Xuehang Wang ◽  
...  
Keyword(s):  
Structure Transition ◽  
Ion Structure ◽  
Charging Dynamics

Problems in Structural Inorganic Chemistry

2018 ◽  
Author(s):  
Wai-Kee Li ◽  
Hung Kay Lee ◽  
Dennis Kee Pui Ng ◽  
Yu-San Cheung ◽  
Kendrew Kin Wah Mak ◽  
...  
Keyword(s):  
Inorganic Chemistry ◽  
Molecular Geometry ◽  
Orbital Theory ◽  
Crystal Field Theory ◽  
Structure Transition ◽  
Oxford University ◽  
Chinese University ◽  
Peking University ◽  
The Subject ◽  
Hybrid Orbitals

The First Edition of this book, which appeared in 2013, serves as a problem text for Part I (Fundamentals of Chemical Bonding) and Part II (Symmetry in Chemistry) of the book Advanced Structural Inorganic Chemistry published by Oxford University Press in 2008. A Chinese edition was published by Peking University Press in August in the same year. Since then the authors have received much feedback from users and reviewers, which prompted them to prepare a Second Edition for students ranging from freshmen to senior undergraduates who aspire to attend graduate school after finishing their first degree in Chemistry. Four new chapters are added to this expanded Second Edition, which now contains over 400 problems and their solutions. The topics covered in 13 chapters follow the sequence: electronic states and configurations of atoms and molecules, introductory quantum chemistry, atomic orbitals, hybrid orbitals, molecular symmetry, molecular geometry and bonding, crystal field theory, molecular orbital theory, vibrational spectroscopy, crystal structure, transition metal chemistry, metal clusters: bonding and reactivity, and bioinorganic chemistry. The problems collected in this volume originate from examination papers and take-home assignments that have been part of the teaching program conducted by senior authors at The Chinese University of Hong Kong over nearly a half-century. Whenever appropriate, source references in the chemical literature are given for readers who wish to delve deeper into the subject. Eight Appendices and a Bibliography listing 157 reference books are provided to students and teachers who wish to look up comprehensive presentations of specific topics.

scholarly journals Fischer–Tropsch Synthesis for Light Olefins from Syngas: A Review of Catalyst Development

Reactions ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 227-257
Author(s):  
Arash Yahyazadeh ◽  
Ajay K. Dalai ◽  
Wenping Ma ◽  
Lifeng Zhang
Keyword(s):  
Pore Size ◽  
Crystal Size ◽  
Tropsch Synthesis ◽  
Light Olefins ◽  
Face Centered Cubic ◽  
Fischer Tropsch ◽  
Light Olefin ◽  
Structure Transition ◽  
Fischer Tropsch Synthesis ◽  
Olefin Selectivity

Light olefins as one the most important building blocks in chemical industry can be produced via Fischer–Tropsch synthesis (FTS) from syngas. FT synthesis conducted at high temperature would lead to light paraffins, carbon dioxide, methane, and C5+ longer chain hydrocarbons. The present work focuses on providing a critical review on the light olefin production using Fischer–Tropsch synthesis. The effects of metals, promoters and supports as the most influential parameters on the catalytic performance of catalysts are discussed meticulously. Fe and Co as the main active metals in FT catalysts are investigated in terms of pore size, crystal size, and crystal phase for obtaining desirable light olefin selectivity. Larger pore size of Fe-based catalysts is suggested to increase olefin selectivity via suppressing 1-olefin readsorption and secondary reactions. Iron carbide as the most probable phase of Fe-based catalysts is proposed for light olefin generation via FTS. Smaller crystal size of Co active metal leads to higher olefin selectivity. Hexagonal close-packed (HCP) structure of Co has higher FTS activity than face-centered cubic (FCC) structure. Transition from Co to Co3C is mainly proposed for formation of light olefins over Co-based catalysts. Moreover, various catalysts’ deactivation routes are reviewed. Additionally, techno-economic assessment of FTS plants in terms of different costs including capital expenditure and minimum fuel selling price are presented based on the most recent literature. Finally, the potential for global environmental impacts associated with FTS plants including atmospheric and toxicological impacts is considered via lifecycle assessment (LCA).

Ionophobic nanopore enhancing capacitance and charging dynamics in supercapacitor with ionic liquids

2021 ◽  
Author(s):  
Zhongdong Gan ◽  
Yanlei Wang ◽  
Mi Wang ◽  
Enlai Gao ◽  
Feng Huo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Power Density ◽  
Porous Electrodes ◽  
Charging Dynamics

Nano-porous electrodes combined with ionic liquids (ILs) are widely favored to promote the energy density of supercapacitors. However, this is always accompanied by the reduced power density, especially considering the...

Charging dynamics in electron transmission through Al2O3 capillaries

2012 ◽  
Vol 279 ◽  
pp. 190-193 ◽  
Author(s):  
A.R. Milosavljević ◽  
K. Schiessl ◽  
C. Lemell ◽  
K. Tőkési ◽  
M. Mátéfi-Tempfli ◽  
...  
Keyword(s):  
Electron Transmission ◽  
Charging Dynamics

Thermochemistry of Organic and Heteroorganic Species. Part IX. Photoionization Studies of Isomerization and Fragmentation of Polysubstituted Cyclopropenes: Phenyl-Substituted Cyclopropenes

2000 ◽  
Vol 6 (1) ◽  
pp. 53-64 ◽  
Author(s):  
V.V. Takhistov ◽  
I.N. Domnin ◽  
D.A. Ponomarev
Keyword(s):  
Mass Spectrometry ◽  
Enthalpy Of Formation ◽  
Good Alternative ◽  
Enthalpies Of Formation ◽  
Isodesmic Reactions ◽  
Ion Structure ◽  
Photoionization Mass Spectrometry ◽  
General Methodology ◽  
Fragment Ions ◽  
The Enthalpy Of Formation

Ionization and appearance energies of some fragment ions from 1,2,3-trimethy1-3-phenyl-, 3-methyl-1,2,3-triphenyl-, 1,2-diphenyl-3-methoxycarbonyl-, 1,2,3-triphenyl-3-methoxycarbonyl- and 1,3,3-triphenyl-2-methoxycarbonyl-cyclopropenes were measured by photoionization mass spectrometry. It was shown that in none of these compounds did the fragment ions possess the expected stable substituted cyclopropenium ion structure. Accordingly, possible schemes of molecular ion isomerization are given. The enthalpies of formation of nearly 50 substituted cyclopropenium ions, and ions of related structure, were estimated using series of isodesmic reactions. This publication, together with the previous works of the authors in this Journal, demonstrates the general methodology for estimation of the enthalpy of formation for even-electron ions. It is suggested that the present methodology can provide a good alternative to other estimation or computation procedures applied to the thermochemistry of ions.

Charging dynamics of integrated circuit passivation layer probe holes in the electron beam tester

1994 ◽  
Vol 65 (26) ◽  
pp. 3341-3343 ◽  
Author(s):  
J. C. H. Phang ◽  
K. S. Sim ◽  
D. S. H. Chan
Keyword(s):  
Electron Beam ◽  
Integrated Circuit ◽  
Passivation Layer ◽  
Charging Dynamics

Solubility, structure transition and chemical durability of Th-doped Nd2Zr2O7 pyrochlore

2021 ◽  
Vol 137 ◽  
pp. 103774
Author(s):  
Lielin Wang ◽  
Jiangbo Li ◽  
Hua Xie ◽  
Qingyun Chen ◽  
Yuqi Xie
Keyword(s):  
Chemical Durability ◽  
Structure Transition

scholarly journals Structure transition of Au18 from pyramidal to a hollow-cage during soft-landing onto a TiO2(110) surface

2015 ◽  
Vol 51 (46) ◽  
pp. 9535-9538 ◽  
Author(s):  
Lei Li ◽  
Hui Li ◽  
Xiao Cheng Zeng
Keyword(s):  
Large Scale ◽  
Soft Landing ◽  
Structure Transition

Simulation of the soft-landing process of pyramidal Au18 onto a rutile TiO2(110) surface using large-scale BOMD simulation.

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