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Low Platinum-Content Electrocatalysts for Highly Sensitive Detection of Endogenously Released H2O2

期刊

BIOSENSORS-BASEL
卷 12, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/bios12090672

关键词

hydrogen peroxide; electrochemical sensing; cathodic reduction; platinum-based electrocatalysts; bimetallic alloys

资金

  1. Foundation for Science and Technology (FCT, Portugal) [UIDB/04567/2020, UIDP/04567/2020]
  2. PADDIC 2021-22 - ALIES-ASSOCIACAO LUSOFONA PARA O DESENVOLVIMENTO DA INVESTIGACAO E ENSINO EM CIENCIAS DA SAUDE

向作者/读者索取更多资源

The commercial viability of electrochemical sensors relies on highly efficient electrode materials with high catalytic activity. Understanding the fundamental structures and typical catalytic properties of nanocatalysts is crucial for selecting the most efficient material. Transition metal nanoparticles have gained attention due to their high surface-to-volume ratio, higher electron transfer rate, and simple functionalization process.
The commercial viability of electrochemical sensors requires high catalytic efficiency electrode materials. A sluggish reaction of the sensor's primary target species will require a high overpotential and, consequently, an excessive load of catalyst material to be used. Therefore, it is essential to understand nanocatalysts' fundamental structures and typical catalytic properties to choose the most efficient material according to the biosensor target species. Catalytic activities of Pt-based catalysts have been significantly improved over the decades. Thus, electrodes using platinum nanocatalysts have demonstrated high power densities, with Pt loading considerably reduced on the electrodes. The high surface-to-volume ratio, higher electron transfer rate, and the simple functionalisation process are the main reasons that transition metal NPs have gained much attention in constructing high-sensitivity sensors. This study has designed to describe and highlight the performances of the different Pt-based bimetallic nanoparticles and alloys as an enzyme-free catalytic material for the sensitive electrochemical detection of H2O2. The current analysis may provide a promising platform for the prospective construction of Pt-based electrodes and their affinity matrix.

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