• 文献标题:   Noncovalent Integration of a Bioinspired Ni Catalyst to Graphene Acid for Reversible Electrocatalytic Hydrogen Oxidation
  • 文献类型:   Article
  • 作  者:   REUILLARD B, BLANCO M, CALVILLO L, COUTARD N, GHEDJATTI A, CHENEVIER P, AGNOLI S, OTYEPKA M, GRANOZZI G, ARTERO V
  • 作者关键词:   bioinspired catalysi, pgmfree fuel cell, molecular electrocatalysi, noncovalent catalyst immobilization, molecular graphenic acid
  • 出版物名称:   ACS APPLIED MATERIALS INTERFACES
  • ISSN:   1944-8244 EI 1944-8252
  • 通讯作者地址:   Univ Grenoble Alpes
  • 被引频次:   1
  • DOI:   10.1021/acsami.9b18922
  • 出版年:   2020

▎ 摘  要

Efficient heterogeneous catalysis of hydrogen oxidation reaction (HOR) by platinum group metal (PGM)-free catalysts in proton-exchange membrane (PEM) fuel cells represents a significant challenge toward the development of a sustainable hydrogen economy. Here, we show that graphene acid (GA) can be used as an electrode scaffold for the noncovalent immobilization of a bioinspired nickel bis-diphosphine HOR catalyst. The highly functionalized structure of this material and optimization of the electrode-catalyst assembly sets new benchmark electrocatalytic performances for heterogeneous molecular HOR, with current densities above 30 mA cm(-2) at 0.4 V versus reversible hydrogen electrode in acidic aqueous conditions and at room temperature. This study also shows the great potential of GA for catalyst loading improvement and porosity management within nanostructured electrodes toward achieving high current densities with a noble-metal free molecular catalyst.