SURFACE CHEMISTRY

Assessing slow surface heating

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Science  02 Jan 2015:
Vol. 347, Issue 6217, pp. 39-40
DOI: 10.1126/science.347.6217.39-d

Calorimetry can provide essential information about surface reactions, but the small amount of heat released from a surface makes experiments challenging. Pyroelectric detection can measure the heat produced when molecules are adsorbed by a thin metal surface, but calibration is simple only for rapid reactions (ones over in ~30 ms). For slower reactions, it is more difficult to assess how the experimental setup distorts the signal. Wolcott and Campbell report a fast Fourier transform method that can deconvolute the measured signal for slower reactions. They use it to reproduce successfully how heat is generated when methyl iodide is adsorbed by a platinum surface, as determined with a more complex modeling method.

Surf. Sci. 10.1016/j.susc.2014.11.005 (2014).

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