TY - JOUR
T1 - Plasmonic Imaging of Electrochemical Reactions at Individual Prussian Blue Nanoparticles
AU - Garcia, Adaly
AU - Wang, Kinsley
AU - Bedier, Fatima
AU - Benavides, Miriam
AU - Wan, Zijian
AU - Wang, Shaopeng
AU - Wang, Yixian
N1 - Funding Information:
This work was supported by National Science Foundation (NSF) Major Research Instrumentation (MRI) grant (CHE 1828334, YW), NSF CAREER award (CHE 2045839, YW), and NSF Partnership for Research and Education in Materials (PREM) (DMR-1523588, AG, KW, FB, and MB). ZW and SW acknowledge the use of facilities within the Arizona State University NanoFab supported in part by NSF program NNCI-ECCS-1542160.
Publisher Copyright:
© Copyright © 2021 Garcia, Wang, Bedier, Benavides, Wan, Wang and Wang.
PY - 2021/9/6
Y1 - 2021/9/6
N2 - Prussian blue is an iron-cyanide-based pigment steadily becoming a widely used electrochemical sensor in detecting hydrogen peroxide at low concentration levels. Prussian blue nanoparticles (PBNPs) have been extensively studied using traditional ensemble methods, which only provide averaged information. Investigating PBNPs at a single entity level is paramount for correlating the electrochemical activities to particle structures and will shed light on the major factors governing the catalyst activity of these nanoparticles. Here we report on using plasmonic electrochemical microscopy (PEM) to study the electrochemistry of PBNPs at the individual nanoparticle level. First, two types of PBNPs were synthesized; type I synthesized with double precursors method and type II synthesized with polyvinylpyrrolidone (PVP) assisted single precursor method. Second, both PBNPs types were compared on their electrochemical reduction to form Prussian white, and the effect from the different particle structures was investigated. Type I PBNPs provided better PEM sensitivity and were used to study the catalytic reduction of hydrogen peroxide. Progressively decreasing plasmonic signals with respect to increasing hydrogen peroxide concentration were observed, demonstrating the capability of sensing hydrogen peroxide at a single nanoparticle level utilizing this optical imaging technique.
AB - Prussian blue is an iron-cyanide-based pigment steadily becoming a widely used electrochemical sensor in detecting hydrogen peroxide at low concentration levels. Prussian blue nanoparticles (PBNPs) have been extensively studied using traditional ensemble methods, which only provide averaged information. Investigating PBNPs at a single entity level is paramount for correlating the electrochemical activities to particle structures and will shed light on the major factors governing the catalyst activity of these nanoparticles. Here we report on using plasmonic electrochemical microscopy (PEM) to study the electrochemistry of PBNPs at the individual nanoparticle level. First, two types of PBNPs were synthesized; type I synthesized with double precursors method and type II synthesized with polyvinylpyrrolidone (PVP) assisted single precursor method. Second, both PBNPs types were compared on their electrochemical reduction to form Prussian white, and the effect from the different particle structures was investigated. Type I PBNPs provided better PEM sensitivity and were used to study the catalytic reduction of hydrogen peroxide. Progressively decreasing plasmonic signals with respect to increasing hydrogen peroxide concentration were observed, demonstrating the capability of sensing hydrogen peroxide at a single nanoparticle level utilizing this optical imaging technique.
KW - hydrogen peroxide
KW - plasmonic electrochemical microscopy
KW - prussian blue nanoparticles
KW - single entity electrochemistry
KW - surface plasmon resonance
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U2 - 10.3389/fchem.2021.718666
DO - 10.3389/fchem.2021.718666
M3 - Article
AN - SCOPUS:85115224435
SN - 2296-2646
VL - 9
JO - Frontiers in Chemistry
JF - Frontiers in Chemistry
M1 - 718666
ER -