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Catalysis of the Oxygen Evolution Reaction by 4–10 Nm Cobalt Nanoparticles
Topics in Catalysis https://doi.org/10.1007/s11244-018-0923-4 ORIGINAL PAPER Catalysis of the Oxygen Evolution Reaction by 4–10 nm Cobalt Nanoparticles Edward Locke1 · Shan Jiang1 · Simon K. Beaumont1 © The Author(s) 2018 Abstract Electrolysis of water is key technology, not only for clean energy production, but to ensure a continued supply of hydrogen beyond fossil resources, essential to the manufacture of many chemical goods other than fuels. Cobalt nanomaterials have been widely identified as a promising candidate for the anode (oxygen evolution) reaction in this process, but much work has focused on applied materials or electrode design. Given the importance of oxidation state changes Co(III) → Co(IV) in the accepted reaction mechanism, in this work we look at size effects in small (4–10 nm) cobalt nanoparticles, where the ease of oxidation for lower cobalt oxidation states is known to change with particle size. To discriminate between geometric and chemical effects we have compared the catalysts in this study to others in the literature by turnover frequency (widely used in other areas of catalysis), in addition to the more commonly employed performance metric of the overpotential required to produce a current density of 10 mA cm−2. Comparisons are drawn to key examples of using well defined nanomaterials (where the surface are of cobalt sites can be estimated). This has enabled an estimated intrinsic turnover rate of ~ 1 O2 mol- ecule per surface Co atom per second at an overpotential of 500 mV in the oxygen evolution reaction under typical alkaline reaction conditions (pH 14.0) to be identified. -
Potential Ivvs.Gelbasedre
US010644304B2 ( 12 ) United States Patent ( 10 ) Patent No.: US 10,644,304 B2 Ein - Eli et al. (45 ) Date of Patent : May 5 , 2020 (54 ) METHOD FOR PASSIVE METAL (58 ) Field of Classification Search ACTIVATION AND USES THEREOF ??? C25D 5/54 ; C25D 3/665 ; C25D 5/34 ; ( 71) Applicant: Technion Research & Development HO1M 4/134 ; HOTM 4/366 ; HO1M 4/628 ; Foundation Limited , Haifa ( IL ) (Continued ) ( 72 ) Inventors : Yair Ein - Eli , Haifa ( IL ) ; Danny (56 ) References Cited Gelman , Haifa ( IL ) ; Boris Shvartsev , Haifa ( IL ) ; Alexander Kraytsberg , U.S. PATENT DOCUMENTS Yokneam ( IL ) 3,635,765 A 1/1972 Greenberg 3,650,834 A 3/1972 Buzzelli ( 73 ) Assignee : Technion Research & Development Foundation Limited , Haifa ( IL ) (Continued ) ( * ) Notice : Subject to any disclaimer , the term of this FOREIGN PATENT DOCUMENTS patent is extended or adjusted under 35 CN 1408031 4/2003 U.S.C. 154 ( b ) by 56 days . EP 1983078 10/2008 (21 ) Appl. No .: 15 /300,359 ( Continued ) ( 22 ) PCT Filed : Mar. 31 , 2015 OTHER PUBLICATIONS (86 ) PCT No .: PCT/ IL2015 /050350 Hagiwara et al. in ( Acidic 1 - ethyl - 3 -methylimidazoliuum fluoride: a new room temperature ionic liquid in Journal of Fluorine Chem $ 371 (c ) ( 1 ), istry vol . 99 ( 1999 ) p . 1-3 ; ( Year: 1999 ). * (2 ) Date : Sep. 29 , 2016 (Continued ) (87 ) PCT Pub . No .: WO2015 / 151099 Primary Examiner — Jonathan G Jelsma PCT Pub . Date : Oct. 8 , 2015 Assistant Examiner Omar M Kekia (65 ) Prior Publication Data (57 ) ABSTRACT US 2017/0179464 A1 Jun . 22 , 2017 Disclosed is a method for activating a surface of metals , Related U.S. Application Data such as self- passivated metals , and of metal -oxide dissolu tion , effected using a fluoroanion -containing composition . -
2012 Summer Undergraduate Research Fund (SURF) Recipients
2012 Summer Undergraduate Research Fund (SURF) Recipients Project Title: Improving Efficiency of Narrative Discourse Analysis in Persons with Brain Injuries Alexandra Addabbo, Communications Disorders , YOG: 2013 Faculty Mentor: Dr. Carl Coelho, Department of Communications Disorders Project Title: The Role of BspA-like Protein in the Microbial Gut Community of Reticulartermes Flavipes and Identification of Species that are Involved in Lignocellulose Degredation Adam Bartholomeo, Molecular and Cell Biology, YOG: 2013 Faculty Mentor: Dr. Daniel Gage, Department of Molecular and Cell Biology Named Award: Ocean Rain Family Foundation Fund for Summer Undergraduate Research Award Project Title: Surveying the Self-Medication Practices of Adults with Sickle Cell Disease Courtney Beyers, Nursing, YOG: 2013 Faculty Mentor: Victoria Odesina, DNP, Department of Nursing Project Title: Investigating of an Efficient System to Harvest Clean Energy from Structural Vibrations Bryan Blanc, Civil Engineering, YOG: 2013 Faculty Mentor: Dr. Ramesh Malla, Department of Civil and Environmental Engineering Named Award: The DeMaio Family Summer Undergraduate Research Fund Project Title: Investigating of an Efficient System to Harvest Clean Energy from Structural Vibrations Kelsey Boch, Chemical Engineering, YOG: 2013 Faculty Mentor: Dr. Yong Wang, Department of Chemical, Materials, and Biomolecular Engineering Project Title: On the Semantic Organization of Concrete and Abstract Terms: a Follow-up to Dunabietia et al. 2009 Christopher Brozowski, Cognitive Science, YOG: 2013 Faculty Mentor: Dr. James Magnuson, Department of Psychology Project Title: Psychological and Emotional Factors to Development in Young Adults with HIV Jenna Burns, Nursing, YOG: 2013 Faculty Mentor: Dr. Elizabeth Anderson, Department of Nursing Project Title: An Investigation into the Synthesis and Reaction Properties of Sulfur Monoxide Casey Camire, Chemistry, YOG: 2014 Faculty Mentor: Dr. -
Nitrato Complexes of Manganese
NITFLAT0 COMPLEXES OF MANGANESE (II I ) DAVID WILLIAM JOHNSON B.Sc., University of Alberta, Calgary, 1966 A THESIS SUBMITTED IN PARTIAL FULFILMENT OF Tm REQUIREMENTS FOR THE3 DEGRE3E OF DOCTOR OF PHILOSOPHY in the Department of Chemistry 0 DAVID WILLIAM JOHNSON SIMON FRASER UNIVERSITY AUGUST, 1972, APPROVAL Name: David William Johnson Degree : Doctor of Philosophy Title of Thesis: Nitrato Complexes of ~snganese(111) Examining Committee : Chairman: T.N. Bell D. Sutton, denior Supervisor F.W.B, Einstein C.H,W, Jones L.K. Peterson - - N. Paddock, Professor, University of British Columbia Vancouver, B .C . Date Approved : I! Abstract The thesis describes a study of the reactions of a variety of manganese compounds with N204 or N205 leading to the synthesis of new manganese compounds with coordinated nitrate groups and other ligands, The aim of this work, to synthesise the first reported nitrato-complexes of manganese in an oxidation state higher than the common state (II), has been achieved, Manganese(II1) trinitrate, M~L(NO~)~,has been prepared by reaction of manganese(II1) trifluoride and dinitrogen pentoxide in dinltrogen tetroxide, Manganese (111) trinitrate is stable indefinitely below -14OC, but rapidly evolves N204 at room temperature and fumes in moist alr, The properties indicate that all nitrate groups are strongly coordinated and suggest that the compound fs polymeric with bridging nitrate groups. The bipyridyl, -o-phenanthroline, triphenylphosphine oxide and acetonitrile complexes of Mn(N0 have been prepared; all are stable at -
Defect Chemistry and Transport Properties of Solid State Materials for Energy Storage Applications
University of Kentucky UKnowledge Theses and Dissertations--Chemical and Materials Engineering Chemical and Materials Engineering 2018 DEFECT CHEMISTRY AND TRANSPORT PROPERTIES OF SOLID STATE MATERIALS FOR ENERGY STORAGE APPLICATIONS Xiaowen Zhan University of Kentucky, [email protected] Author ORCID Identifier: https://orcid.org/0000-0002-1422-6233 Digital Object Identifier: https://doi.org/10.13023/etd.2018.418 Right click to open a feedback form in a new tab to let us know how this document benefits ou.y Recommended Citation Zhan, Xiaowen, "DEFECT CHEMISTRY AND TRANSPORT PROPERTIES OF SOLID STATE MATERIALS FOR ENERGY STORAGE APPLICATIONS" (2018). Theses and Dissertations--Chemical and Materials Engineering. 88. https://uknowledge.uky.edu/cme_etds/88 This Doctoral Dissertation is brought to you for free and open access by the Chemical and Materials Engineering at UKnowledge. It has been accepted for inclusion in Theses and Dissertations--Chemical and Materials Engineering by an authorized administrator of UKnowledge. For more information, please contact [email protected]. STUDENT AGREEMENT: I represent that my thesis or dissertation and abstract are my original work. Proper attribution has been given to all outside sources. I understand that I am solely responsible for obtaining any needed copyright permissions. I have obtained needed written permission statement(s) from the owner(s) of each third-party copyrighted matter to be included in my work, allowing electronic distribution (if such use is not permitted by the fair use doctrine) which will be submitted to UKnowledge as Additional File. I hereby grant to The University of Kentucky and its agents the irrevocable, non-exclusive, and royalty-free license to archive and make accessible my work in whole or in part in all forms of media, now or hereafter known. -
Noble Gas Bonding Interactions Involving Xenon Oxides and Fluorides
molecules Review Noble Gas Bonding Interactions Involving Xenon Oxides and Fluorides Antonio Frontera Department of Chemistry, Universitat de les Illes Balears, Crta de valldemossa km 7.5, 07122 Palma de Mallorca (Baleares), Spain; [email protected] Academic Editor: Felice Grandinetti Received: 17 July 2020; Accepted: 27 July 2020; Published: 28 July 2020 Abstract: Noble gas (or aerogen) bond (NgB) can be outlined as the attractive interaction between an electron-rich atom or group of atoms and any element of Group-18 acting as an electron acceptor. The IUPAC already recommended systematic nomenclature for the interactions of groups 17 and 16 (halogen and chalcogen bonds, respectively). Investigations dealing with noncovalent interactions involving main group elements (acting as Lewis acids) have rapidly grown in recent years. They are becoming acting players in essential fields such as crystal engineering, supramolecular chemistry, and catalysis. For obvious reasons, the works devoted to the study of noncovalent Ng-bonding interactions are significantly less abundant than halogen, chalcogen, pnictogen, and tetrel bonding. Nevertheless, in this short review, relevant theoretical and experimental investigations on noncovalent interactions involving Xenon are emphasized. Several theoretical works have described the physical nature of NgB and their interplay with other noncovalent interactions, which are discussed herein. Moreover, exploring the Cambridge Structural Database (CSD) and Inorganic Crystal Structure Database (ICSD), it is demonstrated that NgB interactions are crucial in governing the X-ray packing of xenon derivatives. Concretely, special attention is given to xenon fluorides and xenon oxides, since they exhibit a strong tendency to establish NgBs. Keywords: noble gas interactions; noncovalent interactions; crystal packing; xenon 1. -
Chemistry of the Noble Gases*
CHEMISTRY OF THE NOBLE GASES* By Professor K. K. GREE~woon , :.\I.Sc., sc.D .. r".lU.C. University of N ewca.stle 1tpon Tyne The inert gases, or noble gases as they are elements were unsuccessful, and for over now more appropriately called, are a remark 60 years they epitomized chemical inertness. able group of elements. The lightest, helium, Indeed, their electron configuration, s2p6, was recognized in the gases of the sun before became known as 'the stable octet,' and this it was isolated on ea.rth as its name (i]A.tos) fotmed the basis of the fit·st electronic theory implies. The first inert gas was isolated in of valency in 1916. Despite this, many 1895 by Ramsay and Rayleigh; it was named people felt that it should be possible to induce argon (apy6s, inert) and occurs to the extent the inert gases to form compounds, and many of 0·93% in the earth's atmosphere. The of the early experiments directed to this end other gases were all isolated before the turn have recently been reviewed.l of the century and were named neon (v€ov, There were several reasons why chemists new), krypton (KpVn'TOV, hidden), xenon believed that the inert gases might form ~€vov, stmnger) and radon (radioactive chemical compounds under the correct con emanation). Though they occur much less ditions. For example, the ionization poten abundantly than argon they cannot strictly tial of xenon is actually lower than those of be called rare gases; this can be illustrated hydrogen, nitrogen, oxygen, fl uorine and by calculating the volumes occupied a.t s.t.p. -
Sop Pyrophoric 2 12/16/2019
Owner DOC. NO. REV. DATE C.H.O SOP PYROPHORIC 2 12/16/2019 DOC. TITLE SOP FOR PYROPHORIC CHEMICALS Environmental Health & Safety STANDARD OPERATING PROCEDURES (SOP) FOR WORKING WITH PYROPHORIC CHEMICALS AT AMHERST COLLEGE ___________________________________________________________________ General Information Pyrophoric Chemicals are solid, liquid, or gas compounds that, when exposed to air or moisture at or below 54°C (130°F), can spontaneously ignite. Examples of Pyrophoric chemicals used at Amherst College Laboratories include: sodium hydride, zinc powder, and Grignard reagents. See the “Appendix” page below for a full list of Pyrophoric Chemicals. Pyrophoric chemicals are often used as catalysts in chemical reactions or as reducing and deprotonating agents in organic chemistry. Note that Pyrophoric chemicals may also be characterized by other hazards, hence, users of these chemicals may also need to refer to other SOPs that cover other hazards. In addition, each individual chemical’s Safety Data Sheet (SDS) should be consulted before they are used. _____________________________________________________________________________________ Personal Protective Equipment When working with Pyrophoric Chemicals, the following personal protective equipment (PPE) must be worn, at a minimum. Depending on the specific chemical, other forms of protection might be required. Consult the SDS for each chemical before use: Splash goggles Lab coat (Fire resistant lab coat highly recommended) Long pants Close toed shoes Gloves – Nitrile gloves adequate for accidental contact with small quantities. However, the use of fire resistant Nomex/ Leather Pilot’s gloves is highly recommended _____________________________________________________________________________________ Safety Devices All work with Pyrophoric chemicals must be done in a glove box, vacuum manifold, or any enclosed inert environment. If work must be done in a fume hood, ensure that the hood sash is in the lowest feasible position. -
Lightning in a Test Tube
Published on ASSIST (https://assist.asta.edu.au) Home > Lightning in a test tube Lightning in a test tube Posted by Anonymous on Thu, 2015-08-20 15:08 Lightning in a test tube: I have a teacher who is planning on performing the 'lightning in a test tube' demonstration in the school lecture theatre. The experiment involves layering ethanol on top of sulfuric acid in a test tube and then dropping some potassium permanganate crystals into the sulfuric acid. I would prefer it to be performed in a fume cupboard. Voting: 0 No votes yet Year Level: 7 8 9 10 Senior Secondary Laboratory Technicians: Laboratory Technicians Showing 1-1 of 1 Responses Lightning in a test tube Submitted by sat on 25 August 2015 Science ASSIST strongly advises against this demonstration being performed in a school. The risks are too high and the demonstration is not able to be adequately controlled. Each of the chemicals involved in this activity has its own particular significant hazards. Ethanol: flammable liquid Sulfuric acid: corrosive acid Potassium permanganate: oxidising agent Sulfuric acid reacts with potassium permanganate to form manganese (VII) oxide (Mn2O7) [also called manganese heptoxide], which is explosive and reacts violently with the ethanol. Significant risks of explosion or fires or both are foreseeable and cannot be controlled, so the risk assessment would conclude that the risks of the demonstration are significant and cannot be adequately controlled at the moment and therefore should not be conducted. An alternative method for demonstrating this -
Mole Ratio Problems
Name: Answer Key Period: ______ Date: __________ Chem B Problems 1 – 6 for HW, the rest for extra practice/review WS 4.6: Mole Ratio Problems Directions: Solve the Following Problems. Show all work on a separate sheet of paper and box your final answer. 1) How many moles of Nitrogen Dioxide will be made from the reaction of 5.5 moles of Dinitrogen Tetraoxide? N2O4(g) → 2 NO2(g) 11 mol NO2 2) How many moles of NH3 will be produced when 13 moles of H2 reacts? N2(g) + 3 H2(g) → 2 NH3(g) 8.7 mol NH3 3) How many moles of NH3 will be produced when 7.0 moles of N2 reacts? N2(g) + 3 H2(g) → 2 NH3(g) 14 mol NH3 4) How many moles of Technetium(VII) Oxide will can be produced from 3.8 moles of Technetium? 4 Tc + 7 O2 → 2 Tc2O7 1.9 mol Tc2O7 5) Given the reaction below, how many moles of Vandium(II) Chloride will form when 3.22 moles of Hydrogen gas reacts? 2 VCl3 + H2 → 2 VCl2 + 2 HCl 6.44 mol VCl2 6) If 12 moles C8H18 burns in excess oxygen, how many moles of Carbon Dioxide will enter the atmosphere and further contribute to global warming? 2 C8H18(l) + 25 O2(g) → 16 CO2(g) + 18 H2O(g) 96 mol CO2 7) If 45.0 moles of CH4 reacts, how many moles of water will be produce? CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g) 90.0 mol H2O 8) How many moles of lead can be extracted if 50 moles of Carbon are used? 2 PbO + C → 2 Pb + CO2 100 mol Pb 9) For the reaction below, determine how many moles of S2Cl2 formed when 7.80 moles of Sulfur reacts? S8 + 4 Cl2 → 4 S2Cl2 31.2 mol S2Cl2 10) How many moles of Bismuth(III) Sulfate “Bi2(SO4)3” will can be produced if 25.0 moles -
Multi-Ionic Lithium Salts for Use in Solid Polymer
A Dissertation Submitted to the Temple University Graduate Board In Partial Fulfillment of the Requirements for the Degree by Examining Committee Members: ABSTRACT Commercial lithium ion batteries use liquid electrolytes because of their high ionic conductivity (>10-3 S/cm) over a broad range of temperatures, high dielectric constant, and good electrochemical stability with the electrodes (mainly the cathode). The disadvantages of their use in lithium ion batteries are that they react violently with lithium metal, have special packing needs, and have low lithium ion transference + numbers (tLi = 0.2-0.3). These limitations prevent them from being used in high energy and power applications such as in hybrid electric vehicles (HEVs), plug in electric vehicles (EVs) and energy storage on the grid. Solid polymer electrolytes (SPEs) will be good choice for replacing liquid electrolytes in lithium/lithium ion batteries because of their increased safety and ease of processability. However, SPEs suffer from RT low ionic conductivity and transference numbers. There have been many approaches to increase the ionic conductivity in solid polymer electrolytes. These have focused on decreasing the crystallinity in the most studied polymer electrolyte, polyethylene oxide (PEO), on finding methods to promote directed ion transport, and on the development of single ion conductors, where the anions are + + immobile and only the Li ions migrate (i.e. tLi = 1). But these attempts have not yet achieved the goal of replacing liquid electrolytes with solid polymer electrolytes in lithium ion batteries. In order to increase ionic conductivity and lithium ion transference numbers in solid polymer electrolytes, I have focused on the development of multi-ionic lithium salts. -
Chemical Names and CAS Numbers Final
Chemical Abstract Chemical Formula Chemical Name Service (CAS) Number C3H8O 1‐propanol C4H7BrO2 2‐bromobutyric acid 80‐58‐0 GeH3COOH 2‐germaacetic acid C4H10 2‐methylpropane 75‐28‐5 C3H8O 2‐propanol 67‐63‐0 C6H10O3 4‐acetylbutyric acid 448671 C4H7BrO2 4‐bromobutyric acid 2623‐87‐2 CH3CHO acetaldehyde CH3CONH2 acetamide C8H9NO2 acetaminophen 103‐90‐2 − C2H3O2 acetate ion − CH3COO acetate ion C2H4O2 acetic acid 64‐19‐7 CH3COOH acetic acid (CH3)2CO acetone CH3COCl acetyl chloride C2H2 acetylene 74‐86‐2 HCCH acetylene C9H8O4 acetylsalicylic acid 50‐78‐2 H2C(CH)CN acrylonitrile C3H7NO2 Ala C3H7NO2 alanine 56‐41‐7 NaAlSi3O3 albite AlSb aluminium antimonide 25152‐52‐7 AlAs aluminium arsenide 22831‐42‐1 AlBO2 aluminium borate 61279‐70‐7 AlBO aluminium boron oxide 12041‐48‐4 AlBr3 aluminium bromide 7727‐15‐3 AlBr3•6H2O aluminium bromide hexahydrate 2149397 AlCl4Cs aluminium caesium tetrachloride 17992‐03‐9 AlCl3 aluminium chloride (anhydrous) 7446‐70‐0 AlCl3•6H2O aluminium chloride hexahydrate 7784‐13‐6 AlClO aluminium chloride oxide 13596‐11‐7 AlB2 aluminium diboride 12041‐50‐8 AlF2 aluminium difluoride 13569‐23‐8 AlF2O aluminium difluoride oxide 38344‐66‐0 AlB12 aluminium dodecaboride 12041‐54‐2 Al2F6 aluminium fluoride 17949‐86‐9 AlF3 aluminium fluoride 7784‐18‐1 Al(CHO2)3 aluminium formate 7360‐53‐4 1 of 75 Chemical Abstract Chemical Formula Chemical Name Service (CAS) Number Al(OH)3 aluminium hydroxide 21645‐51‐2 Al2I6 aluminium iodide 18898‐35‐6 AlI3 aluminium iodide 7784‐23‐8 AlBr aluminium monobromide 22359‐97‐3 AlCl aluminium monochloride