Potassium zincate formula

Chemical compound Sodium zincate refers to anionic zinc oxides or hydroxides, depending on conditions. In the applications of these materials, the exact formula is not necessarily important and it is likely that aqueous zincate solutions consist of mixtures. Hydroxyzincates [ ] Solutions of sodium ZnO + H 2O + 2 NaOH → Na 2Zn(OH) 4 Zn + 2 H 2O + 2 NaOH → Na 2Zn(OH) 4 + H 2 From such solutions, one can crystallize salts of containing the anions Zn(OH) 4 2−, Zn 2(OH) 6 2−, and Zn(OH) 6 4−. Na 2Zn(OH) 4 consists of tetrahedral zincate ion and octahedral sodium cations. The salt Sr 2Zn(OH) 6 features zinc in an octahedral coordination sphere. Oxozincates [ ] Related oxides are also known such as Na 2ZnO 2, 2Zn 2O 3, 10Zn 4O 9. References [ ] • Glenn O. Mallory, Juan B. Hajdu, (1990), Electroless Plating: Fundamentals and Applications, American Electroplaters and Surface Finishers Society, , William Andrew Inc., • Chemistry of the Elements (2nded.). 978-0-08-037941-8. • Synthese und Kristallstruktur von Na 2Zn(OH) 4, R. Stahl , R. Niewa , H. Jacobs, Zeitschrift für anorganische und allgemeine Chemie, volume 625, pp. 48 - 50, • D. Trinschek, M. Jansen (1996): "Na 2ZnO2, ein neues Natriumzinkat". Zeitschrift für Naturforschung B, volume 51, issue 5, pages 711-714. • Eine neue Modifikation von Na 2Zn 2O 3, D. Trinschek, M. Jansen: , Z. Naturforschung 51b, (1996), 917-21 • Ein neues Oxozinkat mit trigonal-planar koordiniertem Zink, D. Trinschek, M. Jansen: Na 10Zn 4O 9, Zeitschrift...

The results of a study of the nature of the concentrated potassium zincate solutions in alkali are reported. Data from several independent but complementary techniques are mutually consistent and show that electrolytically produced solutions of high concentration are relatively complex, the complexity depending upon the age. It is concluded that initially quasi-colloidal particles, based on Zn(OH) 2 and molecules of solvation, are present. The particles of colloidal character are electroinactive and undergo a first order decay to yield a solution containing the species [Zn(OH) 2·2H 2O], [Zn(OH) 3·H 2O] – and [Zn(OH) 4] 2–, the actual constitution depending on the concentration. It is shown that previous spectral assignments are erroneous, reported bands at 283 and 310 Δcm –1 arising from the KOH solution itself. The new data show the non-colloidal zinc species to be tetrahedral, and not planar or octahedral. It was found that the ν 1 band (Raman) of Zn(OH) 2– 4 occurred at 471.2 ± 0.9 Δcm –1(previously accepted value ∼484 Δcm –1). The 430 Δcm –1 value for ν 3 was confirmed but the expected, weak ν 2 and ν 4 bands were not detectable due to the high background and overlapping KOH solution bands. Concentrated potassium zincate solutions studied using laser Raman spectroscopy and potentiometry A. G. Briggs, N. A. Hampson and A. Marshall, J. Chem. Soc., Faraday Trans. 2, 1974, 70, 1978 DOI: 10.1039/F29747001978 To request permission to reproduce material from this article, ple...

Arrhenius formula was applied to calculate the apparent activation energy of zincate reaction. The standard electrode potential of all the metal coordinating ions and the order of galvanic couple of different metals in zincate solution were also calculated. Electrochemical behavior of zincate process was studied by Tafel polarization curves, E—t curves, and electrochemical impedance spectroscopy(EIS). The results show that the apparent activation energy of zincate reaction in non-cyanide multi-metal zincate solution is smaller than that in simple zincate solution, and precipitation sequence of all the metals in zincate solution is Cu, Ni, Fe and Zn. Relationship between the potential at 30 s before zincate and coverage was attained according to the change of potential of zincate. EIS shows that inductive reactance is produced during zincate. Citation Excerpt : Therefore, the effect of electrode substrate has to be seriously considered for the morphology control of zinc deposit. Dendrite deposition was investigated on glassy carbon [42], carbon [123], porous carbon foam [32], Ni [124], zinc powder [26], aluminum [38], Cu, Au, Cd, Pb, Tl, Sn, In [40,41], Al-Si [39], Ag [125,126] and steel [36]. Lead and cadmium substrates were also reported as those facilitating dramatically zinc dendrite formation [40,41]. Zinc-air fuel cells (ZAFCs) present a promising energy source with a competing potential with the lithium-ion battery and even with proton-exchange membrane fuel cells (P...

CN101930148B - 3-stibium 4-potassium zincate compound and monocrystal as well as preparation method and application thereof - Google Patents CN101930148B - 3-stibium 4-potassium zincate compound and monocrystal as well as preparation method and application thereof - Google Patents 3-stibium 4-potassium zincate compound and monocrystal as well as preparation method and application thereof Info Publication number CN101930148B CN101930148B CN200910112069.2A CN200910112069A CN101930148B CN 101930148 B CN101930148 B CN 101930148B CN 200910112069 A CN200910112069 A CN 200910112069A CN 101930148 B CN101930148 B CN 101930148B Authority CN China Prior art keywords antimony monocrystal potassium zincate preparation high temperature Prior art date 2009-06-26 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number CN200910112069.2A Other languages Chinese ( zh) Other versions CN101930148A ( en Inventor 杨松林 程文旦 张�浩 何长振 林晨升 Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Fujian Institute of Research on the Structure of Matter of CAS Original Assignee Fujian Institute of Research on the Structure of Matter of CAS Priority date (The priority date is an assumption and is not a legal conclusion....