A New Class of Efficient Electrocatalysts for the Reduction of Protons into Hydrogen Based on the [Mo2O2S2]2+ Building Block

Autor:	Sébastien Floquet, Marc Bénard, Ali Kachmar, Jean François Lemonnier, Bineta Keita, Marie Madeleine Rohmer, Louis Nadjo, Emmanuel Cadot
Rok vydání:	2008
Předmět:	Inorganic chemistry Protonation Overpotential Electrocatalyst Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis Coulometry chemistry.chemical_compound General Energy chemistry Trifluoroacetic acid Perchloric acid Physical and Theoretical Chemistry Cyclic voltammetry
Zdroj:	The Journal of Physical Chemistry C. 112:1109-1114
ISSN:	1932-7455 1932-7447
DOI:	10.1021/jp0774138
Popis:	Oxothiomolybdenum wheels represent a new family of efficient electrocatalysts for the reduction of protons into hydrogen. The present study focuses on the complex [Mo8S8O8(OH)8(Ox)]2- (1) as a lithium salt (Ox2- = oxalate), which exhibits an electrocatalytic reduction wave of protons in the presence of perchloric acid at about −1.00 V versus SCE in DMF. Efficiency of this new electrocatalyst was evidenced by cyclic voltammetry and coulometry. DFT calculations were reported and bring about data of the protonated state of the catalyst, the first step of the postulated mechanism in the catalytic reaction. Other weak acids such as p-toluenesulfonic acid, trifluoroacetic acid, and acetic acid in DMF were tested and found to be efficient for the reduction of protons. The complex [Mo12S12O12(OH)12(Trim)]3- (2) behaves also as an electrocatalyst, functioning at a very low overpotential. Finally, the biomimetic behaviors of this new class of efficient electrocatalysts for hydrogen production mimic those of hydroge...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dc99bffaf67bbeb5e4092508368567c9 https://doi.org/10.1021/jp0774138 Zobrazit plný text záznamu