Enhanced selective performance of mixed potential ammonia gas sensor by Au nanoparticles decorated CeVO4 sensing electrode

A mixed-potential type sensor using a new sensing electrode (SE) of CeVO4 is developed for NH3 detection. Well-dispersed Au nanoparticles are introduced into the CeVO4-SE by a simple immersion method to further improve the performances, especially the selectivity of the sensor. The sensor using the CeVO4-SE exhibits well response-recovery characteristics to NH3 at 500–600 °C. Good linear correlations between the response potential difference of...