Next Article in Journal
Multi-Robot Cyber Physical System for Sensing Environmental Variables of Transmission Line
Previous Article in Journal
Simultaneous Localization and Map Change Update for the High Definition Map-Based Autonomous Driving Car
Article

Evaluation of Metal Oxide Surface Catalysts for the Electrochemical Activation of Amino Acids

Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824, USA
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(9), 3144; https://doi.org/10.3390/s18093144
Received: 9 August 2018 / Revised: 9 September 2018 / Accepted: 14 September 2018 / Published: 18 September 2018
(This article belongs to the Section Chemical Sensors)
Electrochemical detection of amino acids is important due to their correlation with certain diseases; however, most amino acids require a catalyst to electrochemically activate. One common catalyst for electrochemical detection of amino acids are metal oxides. Metal oxide nanoparticles were electrodeposited onto glassy carbon and platinum working electrodes. Cyclic voltammetry (CV) experiments in a flow cell were performed to evaluate the sensors’ ability to detect arginine, alanine, serine, and valine at micromolar and nanomolar concentrations as high as 4 mM. Solutions were prepared in phosphate buffer saline (PBS) and then 100 mM NaOH. Specifically, NiO surfaces were responsive to amino acids but variable, especially when exposed to arginine. Polarization resistance experiments and scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) data indicated that arginine accelerated the corrosion of the NiO catalyst through the formation of a Schiff base complex. View Full-Text
Keywords: sensor; cyclic voltammetry; electrocatalysis sensor; cyclic voltammetry; electrocatalysis
Show Figures

Figure 1

MDPI and ACS Style

Tooley, C.A.; Gasperoni, C.H.; Marnoto, S.; Halpern, J.M. Evaluation of Metal Oxide Surface Catalysts for the Electrochemical Activation of Amino Acids. Sensors 2018, 18, 3144. https://doi.org/10.3390/s18093144

AMA Style

Tooley CA, Gasperoni CH, Marnoto S, Halpern JM. Evaluation of Metal Oxide Surface Catalysts for the Electrochemical Activation of Amino Acids. Sensors. 2018; 18(9):3144. https://doi.org/10.3390/s18093144

Chicago/Turabian Style

Tooley, Christian A., Charles H. Gasperoni, Sabrina Marnoto, and Jeffrey M. Halpern 2018. "Evaluation of Metal Oxide Surface Catalysts for the Electrochemical Activation of Amino Acids" Sensors 18, no. 9: 3144. https://doi.org/10.3390/s18093144

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop