If you are an author contributing to an RSC publication, you do not need to request permission Please go to the Copyright Clearance Center request page. To request permission to reproduce material from this article in a commercial publication, Provided that the correct acknowledgement is given and it is not used for commercial purposes. This article in other publications, without requesting further permission from the RSC, Sivula,Ĭreative Commons Attribution-NonCommercial 3.0 Unported Licence. The unique composition and structure of the Gibeon meteorite suggest that further investigation of Ir–Co–Ni–Fe systems or other alloys inspired by natural materials for water oxidation are of interest.Ī Gibeon meteorite yields a high-performance water oxidation electrocatalystį. 300 hours of operation as indicated through XPS depth profiling and cyclic voltammetry. The growth of the catalyst layer was self-limiting to <200 nm after ca. Mechanistic studies suggest an operando surface modification involving the formation of a 3D oxy(hydroxide) layer with a metal atom composition of Co 0.11Fe 0.33Ni 0.55, as indicated by Raman and XPS studies and trace Ir as indicated via elemental analysis. The Faradaic efficiency for the OER was unity and no deterioration in performance was detected during 1000 hours of OER operation at 500 mA cm −2. After ageing under operational conditions in an alkaline electrolyte, an activity matching or possibly slightly superior to the best performing OER catalysts emerges, with stable overpotentials as low as 270 mV (for 10 mA cm −2) and Tafel slopes of 37 mV decade −1. Herein, we report the electrocatalytic function of an iron-based Gibeon meteorite for the oxygen evolution reaction (OER). Healing Crystals by Cassandra Eason.Examining the electrocatalytic performance of naturally-occurring metallic minerals is of interest for energy conversion applications given their unique atomic composition and formation history. Gems in Myth, Legend, and Lore by Bruce G. Gemstones of the World by Walter Schumann. Guide to Gems and Precious Stones Simon & Schuster 1986 Stones - Their Collection, Identification and Uses by R. National Audubon Society Field Guide to Rocks and Minerals Alfed A. International Colored Gemstone Association The Curious Lore of Precious Stones by G.F. "Colorful & Dramatic Handcrafted Designer Jewelry" A selection of free form cabochons available for custom designed jewelry. Meteorite specimen exhibiting regmaglypts. Polished fragment showing " Widmanstatten lines". Nickel is thought to purify the blood and increase the body's iron content. Meteoric iron is used for alignment and balancing it symbolizes the aptitude and strength required for endurance. Kalahari Desert tribesmen picked up meteorites that lay on the ground's surface and made arrowheads and assagai-heads, a javelin type weapon made of long, thin pointed iron rods with sharp edges. Gibeon Meteorite Folklore, Legend & Healing Properties: Imagine bread dough that has been kneaded which leaves finger imprints in the dough ball. The surface on some meteorite's may develop shallow pits during the entry process and these pits resemble thumb prints and are known as regmaglypts. As the meteorite descends, it slows down, and the heat from friction decreases resulting in a thin layer of dark glass. When a meteorite enters the Earth's atmosphere, friction raises the surface temperature above its melting point. Probably due to better metal detection equipment, many smaller specimens have been recovered recently. One of the largest masses ever found weighed over 1400 pounds. Until recent years, most Gibeon meteorites that were recovered weighed between 2 pounds. ![]() Lines and patterns are the result of cooling in outer space over billions of years and etching slices with dilute nitric acid allow these patterns known as "Widmanstatten lines" to be more visible. Some other minerals that may be found in the meteorite are chromite, deabreelite, enstatite, kamacite, taenite, troilite or tridymite. Gibeon meteorites are composed of iron, nickel and small amounts of cobalt and classified as a fine octahedrite iron meteorite. The Gibeon meteorites come from broken asteroid fragments or an exploded star and radiometric dating places the age at around 4 billion years old. Since it was first discovered in 1836 in Great Namaqualand, Namibia, Africa, more than 25 tons of Gibeon meteorites have been recovered and although export and sale was banned by the Namibian government, it is still one of the most commonly available meteorites on the market today. Gibeon Meteorite Facts, Information and Description Jewelry in gold and silver with gemstones. Gibeon Meteorite - Facts, Lore, History, Myths and Pictures
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