A novel isothermal electrochemical microcalori-meter
作者： Robin J.H. Clark , Yongchun Zhu
DOI: 10.1016/0040-6031(95)02303-J
关键词: Enthalpy 、 Isothermal process 、 Amplifier 、 Electrochemistry 、 Working electrode 、 Instrumentation 、 Chemistry 、 Electronic circuit 、 Analytical chemistry 、 Wheatstone bridge
摘要: A novel isothermal electrochemical microcalorimeter has been designed and tested. It shows a very fast response to temperature change at the working electrode surface, can be used monitor cyclic voltammetric programme, optimum sweep rate being 0.020 V s−1. The thermogram estimate enthalpy of an reaction. sensitivity factor 3.012 × 10−5 J mV−1 is derived for Wheatstone bridge in chemical reaction via instantaneous measurement surface. one-dimensional semi-infinite diffusion model adopted numerically simulated describe qualitatively function measuring system programme. lock-in amplifier electric circuit offers high quality amplification weak signal.
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