Aim Understanding the scales over which land use affects animal populations is critical for conservation planning, and it can provide information about the mechanisms that underlie correlations between species distributions and land use. We used a citizen science database of anuran surveys to examine the relationship between road density, land use and the distribution of frogs and toads across spatial scales and regions of the United States.
Recently, researchers are seeking alternatives to replace
Pt-based
oxygen reduction reaction (ORR) catalysts used in fuel cells due to
their high cost and certain stability and selectivity issues. For
this purpose, we have synthesized a nanoconjugate, cobalt(II) porphyrin
(5,10,15-triphenyl-20-(4-aminophenyl)porphyrinatocobalt(II), CoTPP-NH2) covalently attached to the acid-functionalized multiwalled
carbon nanotubes and characterized by various techniques including
UV–vis spectroscopy, FTIR, TGA, FESEM, TEM, and Raman spectroscopy.
The oxygen reduction performance of the nanoconjugate is checked in
basic medium. The ORR onset potential of the nanoconjugate-modified
electrode is nearly the same as that of the state-of-the-art platinum-carbon
electrode and stable for more than 3000 CV cycles with a 20 mV difference
in the onset potential before and after the 3000 CV cycles. The above
extrapolations reveal that the nanoconjugate has efficient performance
for the ORR in basic medium.
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