Triazolopyridine–thiophene fluorophores exhibit high fluorescence quantum yields both in solution (80–89%) and in the solid state (13–26%). Because of an excellent and reversible pH induced fluorescence quenching/recovery, sensing devices such as fluorescent papers and complex inkjet-printed patterns are successfully fabricated for the detection of volatile acids both in solution and in a vapor atmosphere.
Here,
we report an efficient Au-doped CuO
x
nanoparticle
electrocatalyst (Au-CuO
x
-80) for oxygen
evolution reaction (OER). The Au-CuO
x
-80
catalyst is prepared using a galvanic replacement
reaction and exhibited excellent catalytic activity for OER in 1 M
Na2CO3 solution (pH = 11.4) with an overpotential
of 380 mV and a Tafel slope of 74 mV dec–1 at a
current density of 10 mA·cm–2 and long-term
stability up to 24 h. We attribute the superior electrocatalytic performance
to the high electronegativity of Au doped inside the Cu2O cubes.
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