A Simple and Fast Electrochemical CO Sensor Based on Li La Zr O for Environmental Monitoring.

In the goal of a sustainable energy future, either the energy efficiency of renewable energy sources is increased, day-to-day energy consumption by smart electronic feedback loops is managed in a more efficient way, or contribution to atmospheric CO is reduced. By defining a next generation of fast-response electrochemical CO sensors and materials, one can contribute to local monitoring of CO flows from industrial plants and processes, for energy management and building control or to track climate alterations. Electrochemical Li -garnet-based sensors with Li La Zr O solid electrolytes can reach notable 1 min response time at lowered operation temperatures to track 400-4000 ppm levels of CO when compared with state-of-the-art NASICON-based sensors. By using principles of redefining the electrode electrochemistry, it is demonstrated that Li La Zr Ta O can be used to alter its classic use as energy-storage function to gain additional functions such as CO tracking.