title: Carbon-Nanotube-Supported Bio-Inspired Nickel Catalyst and Its Integration in Hybrid Hydrogen/Air Fuel Cells.
abstract: A biomimetic nickel bis-diphosphine complex incorporating the amino acid arginine in the outer coordination sphere was immobilized on modified carbon nanotubes (CNTs) through electrostatic interactions. The functionalized redox nanomaterial exhibits reversible electrocatalytic activity for the H2/2 H+interconversion from pH 0 to 9, with catalytic preference for H2oxidation at all pH values. The high activity of the complex over a wide pH range allows us to integrate this bio-inspired nanomaterial either in an enzymatic fuel cell together with a multicopper oxidase at the cathode, or in a proton exchange membrane fuel cell (PEMFC) using Pt/C at the cathode. The Ni-based PEMFC reaches 14 mW cm-2, only six-times-less as compared to full-Pt conventional PEMFC. The Pt-free enzyme-based fuel cell delivers ≈2 mW cm-2, a new efficiency record for a hydrogen biofuel cell with base metal catalysts.
authors.affiliation: Univ. Grenoble Alpes, CNRS, DCM UMR 5250, 38000, Grenoble, France.|Laboratoire de Chimie et Biologie des Métaux, Univ. Grenoble Alpes, CNRS UMR5249, CEA, 38000, Grenoble, France.
authors.forename: Solène
authors.initials: S
authors.lastname: Gentil
authors.affiliation: Univ. Grenoble Alpes, CNRS, DCM UMR 5250, 38000, Grenoble, France.
authors.forename: Noémie
authors.initials: N
authors.lastname: Lalaoui
authors.affiliation: Pacific Northwest National Laboratory, Richland, WA, 99532, USA.|Current address: Chemistry Department, IIT Gandhinagar, Gujarat, 382355, India.
authors.forename: Arnab
authors.initials: A
authors.lastname: Dutta
authors.affiliation: Univ. Grenoble Alpes, CNRS, DCM UMR 5250, 38000, Grenoble, France.
authors.forename: Yannig
authors.initials: Y
authors.lastname: Nedellec
authors.affiliation: Univ. Grenoble Alpes, CNRS, DCM UMR 5250, 38000, Grenoble, France.
authors.forename: Serge
authors.initials: S
authors.lastname: Cosnier
authors.affiliation: Pacific Northwest National Laboratory, Richland, WA, 99532, USA.
authors.forename: Wendy J
authors.initials: WJ
authors.lastname: Shaw
authors.affiliation: Laboratoire de Chimie et Biologie des Métaux, Univ. Grenoble Alpes, CNRS UMR5249, CEA, 38000, Grenoble, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Artero
authors.affiliation: Univ. Grenoble Alpes, CNRS, DCM UMR 5250, 38000, Grenoble, France.
authors.forename: Alan
authors.identifier: 0000-0002-6765-5859
authors.initials: A
authors.lastname: Le Goff
keywords: H2 oxidation; bio-inspired catalysts; biofuel cells; multicopper oxidases; nickel complexes