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{"id":2943,"date":"2013-10-02T08:15:44","date_gmt":"2013-10-02T06:15:44","guid":{"rendered":"https:\/\/energethique.be\/?p=2943"},"modified":"2013-10-02T08:15:44","modified_gmt":"2013-10-02T06:15:44","slug":"trouve-sur-le-web-produire-de-lhydrogene-solaire-a-partir-de-la-rouille","status":"publish","type":"post","link":"https:\/\/energethique.be\/2013\/trouve-sur-le-web-produire-de-lhydrogene-solaire-a-partir-de-la-rouille\/","title":{"rendered":"[Trouv\u00e9 sur le Web] Produire de l’hydrog\u00e8ne solaire \u00e0 partir de la rouille"},"content":{"rendered":"Des chercheurs isra\u00e9liens et suisses d\u00e9couvrent la meilleure structure mol\u00e9culaire, \u00e9cologique et peu co\u00fbteuse, pour synth\u00e9tiser de l’hydrog\u00e8ne \u00e0 partir de la lumi\u00e8re du soleil : la rouille.<\/p>\n
![\"Rouille\"](\"http:\/\/www.bulletins-electroniques.com\/Resources_fm\/actualites\/074\/74051_01_01.jpg\")
\nCr\u00e9dits : Ian Britton<\/p>\n
Dans la course \u00e0 la recherche d’\u00e9nergies propres, l’hydrog\u00e8ne est sans doute l’une des sources les plus pris\u00e9es \u00e0 ce jour, et l’apparition de v\u00e9hicules fonctionnant avec ce gaz se fait de plus en plus visible. R\u00e9cemment, la ville de Tel-Aviv s’est \u00e9quip\u00e9e d’un bus fonctionnant seulement \u00e0 l’hydrog\u00e8ne, ce qui est une avanc\u00e9e par rapport aux moteurs hybrides d\u00e9j\u00e0 existants sur le march\u00e9.<\/p>\n
Sa synth\u00e8se n’est n\u00e9anmoins pas encore maitris\u00e9e et plusieurs chercheurs se penchent sur la question, privil\u00e9giant la voie dite \u00ab\u00a0de s\u00e9paration\u00a0\u00bb, qui consiste \u00e0 s\u00e9parer \u00e9lectrochimiquement les mol\u00e9cules d’eau en mol\u00e9cules d’oxyg\u00e8ne et d’hydrog\u00e8ne. Les cellules photo-\u00e9lectrochimiques (PEC) sont utilis\u00e9es pour effectuer cette s\u00e9paration gr\u00e2ce \u00e0 l’\u00e9nergie solaire.<\/p>\n
Des chercheurs isra\u00e9liens et suisses du Technion et de l’Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne, ont d\u00e9couvert la structure mol\u00e9culaire qui procurerait au PEC le meilleur rendement et la synth\u00e8se la moins co\u00fbteuse, et ce, en utilisant un mat\u00e9riau tr\u00e8s abondant, stable et peu on\u00e9reux : la rouille. En observant \u00e0 l’aide d’un microscope \u00e0 transmission \u00e9lectrique le chemin parcouru par les \u00e9lectrons sur la structure d’oxyde de fer, les chercheurs ont pu comprendre en profondeur le processus de s\u00e9paration qui constitue la synth\u00e8se d’hydrog\u00e8ne et ainsi cr\u00e9er la meilleure structure mol\u00e9culaire possible. Si la synth\u00e8se de cellules photovolta\u00efques actuelles pour produire de l’hydrog\u00e8ne co\u00fbte environ 15 euros le kilo, la nouvelle structure mol\u00e9culaire dont la d\u00e9couverte vient d’\u00eatre publi\u00e9e dans la prestigieuse revue Nature co\u00fbte moins de 5 euros le kilo produit.<\/p>\n
Cette d\u00e9couverte constitue une avanc\u00e9e fondamentale dans la recherche sur les \u00e9nergies du futur.\t\t\t\t\t<\/p>\n
Sources :
\n– Scott C.Warren, Kislon Vo\u00eftchovsky, Hen Dotan, Celine M. Leroy, Maurin Cornuz, Francesco Stellacci, C\u00e9cile H\u00e9bert, Avner Rothschild and Michael Gr\u00e4tzel, ‘Identification of champion nanostructures for solar water-splitting’, Nature materials online edition, July 7, 2013
\n– \u00ab\u00a0First rate nano-rust for producing solar hydrogen\u00a0\u00bb, site du Technion, 8 juillet 2013 – http:\/\/redirectix.bulletins-electroniques.com\/ZjvSX<\/a><\/p>\nR\u00e9dacteurs :
\nYonathan Aflalo, Volontaire international chercheur au Technion – Israel Institute of Technology<\/p>\n
Origine :
\nBE Isra\u00ebl num\u00e9ro 92 (30\/09\/2013) – Ambassade de France en Isra\u00ebl \/ ADIT – http:\/\/www.bulletins-electroniques.com\/actualites\/74051.htm<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Des chercheurs isra\u00e9liens et suisses d\u00e9couvrent la meilleure structure mol\u00e9culaire, \u00e9cologique et peu co\u00fbteuse, pour synth\u00e9tiser de l’hydrog\u00e8ne \u00e0 partir de la lumi\u00e8re du soleil : la rouille.<\/p>\n
\nCr\u00e9dits : Ian Britton<\/p>\n
Dans la course \u00e0 la recherche d’\u00e9nergies propres, l’hydrog\u00e8ne est sans doute l’une des sources les plus pris\u00e9es \u00e0 ce jour, et l’apparition de v\u00e9hicules fonctionnant avec ce gaz se fait de plus en plus visible. R\u00e9cemment, la ville de Tel-Aviv s’est \u00e9quip\u00e9e d’un bus fonctionnant seulement \u00e0 l’hydrog\u00e8ne, ce […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[1],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pBGwz-Lt","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/2943"}],"collection":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/comments?post=2943"}],"version-history":[{"count":0,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/2943\/revisions"}],"wp:attachment":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/media?parent=2943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/categories?post=2943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/tags?post=2943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}