Yufeng Lai

Nov 28, 2024 | mdpi.com | Xuanqi Liu |Yufeng Lai |Yuchen Zhang |Muyi Pan

1. IntroductionFlame colour, as one of the most fundamental characteristics of a flame, has been studied for centuries. Among several kinds of combustible gaseous fuels, hydrogen has been of great research interest due to its unique advantages, such as being renewable and non-toxic. Although the hydrogen flame colour was first described as “faint reddish-brown” by W. F.