%0 Journal Article %T From Hydrogenases to Noble Metal-Free Catalytic Nanomaterials for H$_2$ Production and Uptake %+ Service de Physique et de Chimie des Surfaces et Interfaces (SPCSI) %+ Institut de Biosciences et de Biotechnologies de Grenoble (ex-IRTSV) (BIG) %+ Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN) %+ Collège de France - Chaire Chimie des processus biologiques %A Goff Alan, Le %A Vincent, Artero %A Jousselme, Bruno %A Tran Phong, Dinh %A Nicolas, Guillet %A Metayé, Romain %A Aziz, Fihri %A Palacin, Serge %A Fontecave, Marc %< avec comité de lecture %@ 0036-8075 %J Science %I American Association for the Advancement of Science (AAAS) %V 326 %N 5958 %P 1384-1387 %8 2009 %D 2009 %R 10.1126/science.1179773 %Z Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics %Z Physics [physics]Journal articles %X Interconversion of water and hydrogen in unitized regenerative fuel cells is a promising energy storage framework for smoothing out the temporal fluctuations of solar and wind power. However, replacement of presently available platinum catalysts by lower-cost and more abundant materials is a requisite for this technology to become economically viable. Here, we show that the covalent attachment of a nickel bisdiphosphine–based mimic of the active site of hydrogenase enzymes onto multiwalled carbon nanotubes results in a high–surface area cathode material with high catalytic activity under the strongly acidic conditions required in proton exchange membrane technology. Hydrogen evolves from aqueous sulfuric acid solution with very low overvoltages (20 millivolts), and the catalyst exhibits exceptional stability (more than 100,000 turnovers). The same catalyst is also very efficient for hydrogen oxidation in this environment, exhibiting current densities similar to those observed for hydrogenase-based materials. %G English %2 https://cea.hal.science/cea-00817460/document %2 https://cea.hal.science/cea-00817460/file/legh.pdf %L cea-00817460 %U https://cea.hal.science/cea-00817460 %~ INSERM %~ CEA %~ UNIV-SAVOIE %~ UGA %~ CNRS %~ UNIV-GRENOBLE1 %~ CDF %~ INRA %~ LCPB %~ PUBNIMBE %~ DRT %~ INC-CNRS %~ SPCSI %~ PSL %~ AGREENIUM %~ CEA-DRF %~ LITEN %~ BIG %~ SORBONNE-UNIVERSITE %~ IRIG %~ CEA-GRE %~ SU-INF-2018 %~ SU-SCIENCES %~ INRAE %~ CDF-PSL %~ USMB-COMUE %~ SU-TI %~ IRAMIS %~ ALLIANCE-SU %~ INES %~ TEST2-HALCNRS %~ CHIMIE-SU