Back Cover: Magnetic‐Field‐Stimulated Efficient Photocatalytic N₂ Fixation over Defective BaTiO₃ Perovskites (Angew. Chem. Int. Ed. 21/2021)

Abstract

Magneticf ield stimulated … …p hotocatalytic N 2 fixation over defective BaTiO 3 perovskites is described by Ming Feng,H aibo Li, Zhongwei Chen, and co-workers in their Research Article on page 11910. Thee lectromagnetic synergistic effect promotes N 2 adsorption and activation while facilitating fast charge separation under UV/Vis irradiation. This study offers an alternative route for exploring photocatalytic N 2 fixation materials.

Enabling Internal Electric Fields to Enhance Energy and Environmental Catalysis

“…The thermal reduction method was used to create O vacancies on the surface of BaTiO 3 , and the concentration of O vacancies could be controlled by the reduction time. [ 10 ] The introduction of surface O vacancies not only accurately modulated the surface electronic state and spin polarization but also acted as active sites for the NRR by increasing N 2 adsorption and triple bond dissociation. However, excessive O vacancies also behaved as recombination centers for photogenerated carriers, hindering the photocatalytic process.…”

“…By strengthening the intensity of internal electric field, enlarging the scope of internal electric field and building multiple internal electric fields, the photocatalytic activities were further improved. As shown in Figure 14 , elemental doping, [ 103,147 ] defect engineering, [ 10,32 ] molecular regulation, [ 148 ] facet and crystallinity control can be used to heighten the intensity of internal electric field, [ 117,118 ] and strengthening the applied external force is suitable for enhancing the intensity of internal electric field of catalytic systems containing piezoelectric materials. [ 18,119 ] Tailoring microstructures to enlarge the specific surface area is usually applied to enlarge the scope of internal electric field, such as 0D, 1D, 2D, and 3D structures.…”

“…For photo(electro)catalysis driven by solar energy, the formation of internal electric fields can circumvent the rapid recombination of photoinduced carriers by providing a driving force for the directional migration of photogenerated electrons and holes. [ 10 ] For some multicomponent materials, the formation of an internal electric field at phase boundaries can promote the recombination of relatively inefficient electrons and holes, resulting in the spatial separation of highly effective electrons and holes with optimal redox potential. [ 11 ] Note that internal electric fields cannot only provide continuous electron transfer paths and optimal redox potential but also balance the appropriate conditions for intermediate adsorption.…”

Unique Tubular BiOBr/g‐C3N4 Heterojunction with Efficient Separation of Charge Carriers for Photocatalytic Nitrogen Fixation

“…However, most of the studies reported low conversion efficiency of photocatalysts for the reduction of N 2 to ammonia. The main problems are severe photogenerated electron and hole recombination and the difficult activation and dissociation of N 2 molecules [4] . So, designing semiconductor catalysts with high carrier separation efficiency and high nitrogen molecular activation capacity is the key to obtain high ammonia yield.…”

Enhanced oxygen evolution reactionviathe tunability of spin polarization and electronic states in a flexible van der Waals membranous catalyst

“…19–23 It is highly anticipated that TMO catalysts will exhibit both magnetic field and strain tunable OER performance, as d electrons typically possess spin polarization characteristics. 24–30…”