P-induced Co-based interfacial catalysis on Ni foam for hydrogen generation from ammonia borane

Efficient oxygen evolution reaction from iron-molybdenum nitride/molybdenum oxide heterostructured composites

“…The formed Mo–N bonds, pyridine N and graphite N species may generate a cooperative effect to boost the electrocatalytic OER performance by weakening the energy barrier for active intermediates and improving the electrical conductivity of the hybrid electrocatalyst. 14 The O 1s high resolution XPS spectrum exhibits two peaks located at around 531.08 and 532.42 eV, corresponding to the metal–oxygen bond and hydroxyl species originated from the adsorbed water, which further confirmed the presence of MoO 3 in the as-prepared composite catalyst.…”

“…Other three peaks corresponding to pyridinic N, pyrrolic N and graphitic N are detected at 398.58, 399.75 and 401.21 eV, respectively. The formed Mo-N bonds, pyridine N and graphite N species may generate a cooperative effect to boost the electrocatalytic OER performance by weakening the energy barrier for active intermediates and improving the electrical conductivity of the hybrid electrocatalyst 14.…”

Highly electron-deficient ultrathin Co nanosheets supported on mesoporous Cr2O3 for catalytic hydrogen evolution from ammonia borane

“…7d displays the DMPO-˙OH signals with the characteristic intensity of spin trap signals of ˙OH with 1 : 2 : 2 : 1. 59 Noticeably, the intensity of spin-trap signals of ˙OH in Co/Cr 2 O 3 is also stronger than in Cr 2 O 3 , suggesting that Co/Cr 2 O 3 also can facilitate the generation of ˙OH. In addition, no signals were observed in the dark.…”

Rational 3D Structure of Monolithic Catalysts for Enhanced Hydrolytic Dehydrogenation of Ammonia Borane

“… To sum up, as for the unmodified CoMoB active layer, element B acts as an electron donor to generate electron-rich Co, and Mo provides a small amount of oxygen vacancies in the form of high-valent oxides, which plays as electron promoter to transfer electrons to surface Co atoms. , By further electrochemical modification, the introduction of Fe elements intensifies the electron enrichment of Co, and a large number of Co and O vacancies are introduced through the directional migration of atoms . The above increases the number of catalytic active sites and electronic modulation of metallic sites (Co), and the effective kinetic activation of H 2 O on the electron-rich Co allows an easier dissociation into OH and H, which is the rate-determining step of a reaction step of AB hydrolysis. , The above multilevel synergistic from electron transfer to vacancy generation to micromorphology leads to a significant performance enhancement of the Fe-CoMoB active layer, providing an ∼3-fold catalytic activity in hydrolytic dehydrogenation of AB (Figure S8).…”