Fig. 8

Reaction temperature vs. achieved pressure from the formic acid dehydrogenation using selected catalysts. Selected data are shown as follows: red filled circles referred from (Iguchi, et al., 2016a, b; Kawanami et al., 2020), blue filled diamond referred from (Fellay et al., 2009), green filled triangle referred from (Papp et al., 2016), yellow square is referred from (Czaun et al., 2016), and black crosses are referred (Broicher et al., 2017; Zhong et al., 2017)