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NiAl Layered Double Hydroxides and PdNiO as Multifunctional Anodes for Prospective Self‐Powered Lab‐on‐a‐Chip Dopamine Sensors
Author(s) -
GalindodelaRosa J.,
Arriaga L. G.,
Álvarez A.,
Arjo.,
Déctor A.,
ChavézRamírez A. U.,
VallejoBecerra V.,
LedesmaGarcía J.
Publication year - 2018
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201800119
Subject(s) - nial , layered double hydroxides , materials science , bimetallic strip , anode , dopamine , power density , urea , chemical engineering , metallurgy , catalysis , electrode , chemistry , intermetallic , power (physics) , alloy , organic chemistry , physics , quantum mechanics , neuroscience , metal , biology , engineering
The purpose of this work is the evaluation of two bimetallic materials, PdNiO and NiAl‐layered double hydroxides (NiAl‐LDHs) for their prospective use in Lab‐on‐a‐Chip devices, in which urea contained in human urine is used as fuel to provide the energy required by the device and dopamine in the sample is detected. A urea microfluidic fuel cell, using human urine as fuel and NiAl‐LDHs and PdNiO as anodes, was constructed and evaluated, resulting in a cell potential of 1 V with 50.19 mW/cm 2 power density for NiAl‐LDHs and 0.9 V and 32.94 mW/cm 2 for PdNiO. The multifunctionality of these anodes was extended for detecting dopamine with detection limits of 7.38×10 −8 M and 5.46×10 −6 M for NiAl‐LDHs and PdNiO, respectively. The higher content of hydroxides on NiAl‐LDHs than PdNiO material allowed a better activity for urea oxidation and dopamine detection. These results show the prospects for self‐powered biomedical Lab‐on‐a‐Chip device development.