Novel amorphous molybdenum selenide as an efficient catalyst for the hydrogen evolution reaction.

Title Novel amorphous molybdenum selenide as an efficient catalyst for the hydrogen evolution reaction.
Authors Q.T. Nguyen; P.Dinh Nguyen; D.N. Nguyen; Q.Duc Truong; T.Thi Kim Chi; T. Ung; I. Honma; N.Quang Liem; P.D. Tran
Journal ACS Appl Mater Interfaces
DOI 10.1021/acsami.7b18675
Abstract

Amorphous molybdenum selenide nanopowder, obtained by refluxing Mo(CO)6 and Se precursors in dichlorobenzene, shows several structural and electrochemical similarities to the amorphous molybdenum sulfide analogue. The molybdenum selenide displays attractive catalytic properties for the hydrogen evolution reaction in water over a wide range of pH. In a pH 0 solution, it operates with a small onset overpotential of 125 mV and requires an overpotential of 270 mV for generating a catalytic current of 10 mA/cm2. Compared with the molybdenum sulfide, the selenide analogue is more robust in a basic electrolyte. Therefore, the molybdenum selenide is a potential candidate for incorporating within an electrolyser or a photoelectrochemical cell for water electrolysis either in acidic, neutral or alkaline medium.

Citation Q.T. Nguyen; P.Dinh Nguyen; D.N. Nguyen; Q.Duc Truong; T.Thi Kim Chi; T. Ung; I. Honma; N.Quang Liem; P.D. Tran.Novel amorphous molybdenum selenide as an efficient catalyst for the hydrogen evolution reaction.. ACS Appl Mater Interfaces. 2018. doi:10.1021/acsami.7b18675

Related Elements

Molybdenum

See more Molybdenum products. Molybdenum (atomic symbol: Mo, atomic number: 42) is a Block D, Group 6, Period 5 element with an atomic weight of 95.96. Molybdenum Bohr ModelThe number of electrons in each of molybdenum's shells is [2, 8, 18, 13, 1] and its electron configuration is [Kr] 4d5 5s1. The molybdenum atom has a radius of 139 pm and a Van der Waals radius of 209 pm. In its elemental form, molybdenum has a gray metallic appearance. Molybdenum was discovered by Carl Wilhelm in 1778 and first isolated by Peter Jacob Hjelm in 1781. Molybdenum is the 54th most abundant element in the earth's crust. Elemental MolybdenumIt has the third highest melting point of any element, exceeded only by tungsten and tantalum. Molybdenum does not occur naturally as a free metal, it is found in various oxidation states in minerals. The primary commercial source of molybdenum is molybdenite, although it is also recovered as a byproduct of copper and tungsten mining. The origin of the name Molybdenum comes from the Greek word molubdos meaning lead.

Selenium

Selenium Bohr ModelSee more Selenium products. Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d10 4s2 4p4. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Selenium is a non-metal with several allotropes: a black, vitreous form with an irregular crystal structure three red-colored forms with monoclinic crystal structures and a gray form with a hexagonal crystal structure, the most stable and dense form of the element. Elemental SeleniumOne of the most common uses for selenium is in glass production the red tint that it lends to glass neutralizes green or yellow tints from impurities in the glass materials. Selenium was discovered and first isolated by Jöns Jakob Berzelius and Johann Gottlieb Gahn in 1817. The origin of the name Selenium comes from the Greek word "Selênê," meaning moon.

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