Ammonia Synthesis Over Co Catalyst in an Electric Field

Recent progress in use and observation of surface hydrogen migration over metal oxides

“…Furthermore, r associative was multiplied by H atom coverage over supports (y(H + )) because the rate-determining step in this reaction mechanism is N 2 H formation. 12 As presented in Fig. 13(a), the reaction rates (red closed plot) calculated based on assumption described above show great agreement with the experimentally obtained values (black closed plot).…”

“…Hydrogen migration plays an important role in various catalyses such as hydrogenation-dehydrogenation of hydrocarbon, 1-5 CO 2 reduction [6][7][8][9] and NH 3 synthesis. [10][11][12][13][14][15][16][17] However, the utilisation of hydrogen migration is not limited to catalysis. It is also fundamentally important for catalyst preparation, 18,19 hydrogen storage, 20,21 fuel cells and sensors.…”

“…To date, this method has been applied to various catalytic reactions, revealing that surface ion conduction participates in low-temperature catalysis. 39,40,84 Herein, we have described reaction mechanisms that are relevant to surface protonics under a H 2 atmosphere: NH 3 synthesis proceeds via N 2 H [11][12][13][14][15][16][17] and dehydrogenation of methylcyclohexane (MCH) facilitated by H + collision. Both compounds are promising hydrogen carrier candidates.…”

“…First, we examined the support role in NH 3 synthesis in the electric field combining experiments and DFT calculations. 12 Ru was chosen as a supported metal. Ru particle was expressed by a Ru rod having a periodic structure in DFT calculation, as presented in Fig.…”

First observation of surface protonics on SrZrO3 perovskite under a H2 atmosphere

“…[4][5][6] Recently, an important role of surface protonics during heterogeneous catalytic reactions was found in an electric field under both H 2 O and H 2 atmospheres. [7][8][9][10][11][12][13][14][15][16][17][18][19] It promotes low-temperature catalysis for hydrogen production, ammonia synthesis, and other processes. Electrochemical impedance spectroscopy (EIS) of oxide surfaces under a H 2 O atmosphere has been investigated to elucidate the correlation between catalysis in an electric field and surface protonics (Scheme 1).…”