Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 2, Pages 2207-2215Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b13571
Keywords
mechanochemistry; graphitic carbon nitride; silver nanoparticles; hemoglobin; bioconjugates; hydrogen evolution reaction; electrocatalysis; synergy
Funding
- MINECO [CTQ2016-78289-P, FJCI-2016-29014]
- FEDER funds
- Plan Propio de Investigacion from the Universidad de Cordoba (UCO)
- Programa Operativo de fondos FEDER Andalucia
- RUDN University, Program 5-100
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A graphitic carbon nitride nanostructure has been successfully functionalized by incorporation of different silver contents and subsequent modification with an alpha-rich protein, namely hemoglobin. Mechanochemistry has been employed, as an efficient and sustainable procedure, for the incorporation of the protein. A complete characterization analysis has been performed following a multitechnique approach. Particularly, XPS data exhibited considerable differences in the C 1s region for the Hb/xAg@CN, ensuring the successful protein anchorage on the surface of the graphitic carbon nitride-based materials. The as-synthesized nanomaterials delivered impressive performance toward hydrogen evolution reactions with an overpotential of 79 mV at a current density of 10 mA/cm(2) for Hb/20Ag@CN nanohybrids, which is comparable with the most efficient HER electrocatalysts reported in the literature. The outstanding HER properties were associated with the unique synergistic interactions, quantitatively measured, between AgNPs, Hb tertiary architecture, and the graphitic carbon nitride networks.
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