Solid-state electrochemical hydrogen sensors: A review

Hydrogen is an excellent energy carrier and considered a promising candidate to replace petroleum-based fossil fuels. But there are unsafe factors in the use process of hydrogen. Therefore, it is necessary to develop a commercially viable and highly reliable hydrogen sensor. Here, this review, the findings presented in recent research papers and future directions of solid electrolyte electrochemical hydrogen sensor based is introduced. We discovered that solid-state electrochemical hydrogen sensors have the advantages of portability, miniaturization, real-time monitoring, reliable and fast response. Future development directions will include improvement of material properties, high sensor responsiveness and durability, enhancement of integration and miniaturization, and new material systems, including nanomaterials, composite material. In the future, networking, intelligent and the trend of combining multiple technologies into smart/intelligent detection devices will favor the development of hydrogen sensors in a wide measuring range and better response time.