A Schiff base modified gold catalyst for green and efficient H2 production from formic acid†
Formic acid (FA) dehydrogenation is an atom-economic method for H2 production, while diluted FA with extra additives is generally required in heterogeneous dehydrogenation of FA. Here, we report a novel Schiff base functionalized gold catalyst, which showed excellent catalytic performances for H2 production in catalytic dehydrogenation of high-concentration FA without any additives. The record turnover frequency (TOF) was as high as 4368 h−1 in 10 M FA solutions, and was up to 2882 h−1 even in 99% FA at a mild temperature of 50 °C. According to characterization results, a synergetic mechanism for C–H activation between the protonated Schiff base and electronegative gold nanoparticles (NPs) at the interface was suggested to be responsible for its unusual catalytic activity toward H2 production from FA.