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4 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2022

Nanoporous Pt(Au) Alloys for the Enhanced, Non–enzymatic Detection of Hydrogen Peroxide under Biofouling Conditions

The non-enzymatic electrochemical sensing of hydrogen peroxide (H 2 O 2 ) is described. This study utilized a 3D bicontinuous nanoporous platinum-gold alloy-based sensor (NP-Pt(Au) electrode), which has a morphology that resembles a molecular sieve. SEM and CV were used to evaluate the morphological and electrochemical characteristics of the NP-Pt(Au) electrodes. The cathodic voltammetric response of H 2 O 2 was enhanced at the NP-Pt(Au) as compared to planar Pt electrodes. Further, the nanoporous electrode was able to maintain the H 2 O 2 voltammetric profile even in the presence of the biofouling agent, serum albumin. Its application as a non-enzymatic sensor for the amperometric measurement of H 2 O 2 was explored.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpPt3 by Materials Project

NpPt3 is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Np6+ sites. In the first Np6+ site, Np6+ is bonded to twelve Pt2- atoms to form a mixture of corner and face-sharing NpPt12 cuboctahedra. There are six shorter (2.90 Å) and six longer (2.99 Å) Np–Pt bond lengths. In the second Np6+ site, Np6+ is bonded to twelve Pt2- atoms to form a mixture of corner and face-sharing NpPt12 cuboctahedra. There are six shorter (2.90 Å) and six longer (2.98 Å) Np–Pt bond lengths. There are two inequivalent Pt2- sites. In the first Pt2- site, Pt2- is bonded to four Np6+ atoms to form a mixture of distorted corner and face-sharing PtNp4 cuboctahedra. In the second Pt2- site, Pt2- is bonded in a distorted square co-planar geometry to four Np6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpPt3 by Materials Project

NpPt3 is beta Cu3Ti-like structured and crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Np6+ is bonded to twelve Pt2- atoms to form a mixture of face and corner-sharing NpPt12 cuboctahedra. There are a spread of Np–Pt bond distances ranging from 2.87–3.01 Å. There are two inequivalent Pt2- sites. In the first Pt2- site, Pt2- is bonded in a distorted see-saw-like geometry to four equivalent Np6+ atoms. In the second Pt2- site, Pt2- is bonded in a distorted see-saw-like geometry to four equivalent Np6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpPt by Materials Project

PtNp crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Np is bonded in a 7-coordinate geometry to seven equivalent Pt atoms. There are a spread of Np–Pt bond distances ranging from 2.86–3.10 Å. Pt is bonded in a 7-coordinate geometry to seven equivalent Np and two equivalent Pt atoms. Both Pt–Pt bond lengths are 2.90 Å.

36 MATERIALS SCIENCE↗