CoO engineered Co9S8 catalyst for CO2 photoreduction with accelerated electron transfer endowed by the built-in electric field

Reaction Mechanism of the Enhanced Reaction Activity and Rate of N-Doped CoO Photocatalysts for Photoreduction of CO2 in Air

“…The formation of a local electric field provides a directional path for the transfer of photogenerated charges. The possibility of carrier recombination is reduced, and the transmission rate of photogenerated electrons increases, thereby increasing the efficiency of the catalytic reaction as a whole. , The high-resolution TEM image (Figure c) further reveals the lattice structure of the nanowires. Two different crystal lattices can be clearly observed, the 0.33 nm crystal lattice of the (220) crystal plane of the CoO phase and the 0.23 nm crystal lattice of the (200) crystal plane of the CoO phase.…”

“…The possibility of carrier recombination is reduced, and the transmission rate of photogenerated electrons increases, thereby increasing the efficiency of the catalytic reaction as a whole. 32,33 The high-resolution TEM image (Figure 1c Compared with the standard card (PDF# 97-024-5320), the positions of the diffraction peaks of N-doped CoO are slightly shifted to the low-angle direction. This is consistent with the increase in the lattice distance of the synthesized photocatalyst caused by the introduction of N. As the reaction temperature increases, the peak shape of the diffraction peak of N-doped CoO becomes sharper.…”

Scalable Synthesis of Holey Deficient 2D Co/NiO Single‐Crystal Nanomeshes via Topological Transformation for Efficient Photocatalytic CO2 Reduction

“…On assessing the combined gas yield (mmol g −1 h −1 ), Co/NiO‐2 outperforms many state‐of‐the‐art heterogeneous photocatalysts in previous literatures, such as Co 9 S 8 /CoO@C ( V CO = 17.1 mmol g −1 h −1 , $${V_{{{\rm{H}}_2}}}$$ = 4.75 mmol g −1 h −1 ), [ 34 ] Ni MOLs ( V CO = 12.5 mmol g −1 h −1 , $${V_{{{\rm{H}}_2}}}$$ = 0.28 mmol g −1 h −1 ), [ 35 ] NiCo 2 O 4 HCs ( V CO = 10.5 mmol g −1 h −1 , $${V_{{{\rm{H}}_2}}}$$ = 0.74 mmol g −1 h −1 ), [ 36 ] and other catalysts summaries in Figure 3f and Table S2 in the Supporting Information. [ 37 ] The Co/NiO‐2 maintains high efficiency in five cycling tests (Figure S15, Supporting Information).…”

“…The CO/H 2 ratio of syngas generated over Co/NiO-2 is about 1.82, and the obtained syngas is of strong utility as the important feedstock for preparing value-added chemical such as methanol. [33] On assessing the combined gas yield (mmol g −1 h −1 ), Co/ NiO-2 outperforms many state-of-the-art heterogeneous photo catalysts in previous literatures, such as Co 9 S 8 /CoO@C (V CO = 17.1 mmol g −1 h −1 , V H2 = 4.75 mmol g −1 h −1 ), [34] Ni MOLs (V CO = 12.5 mmol g −1 h −1 , V H2 = 0.28 mmol g −1 h −1 ), [35] NiCo 2 O 4 HCs (V CO = 10.5 mmol g −1 h −1 , V H2 = 0.74 mmol g −1 h −1 ), [36] and other catalysts summaries in Figure 3f and Table S2 in the Supporting Information. [37] The Co/NiO-2 maintains high efficiency in five cycling tests (Figure S15, Supporting Information).…”

Designing a Built-In Electric Field for Efficient Energy Electrocatalysis

“…). − Aiming at this, various strategies toward electrocatalyst design, including nanostructure arraying, − defect engineering, − alloying, − atomic site designing, − heteroatom doping, − etc., have been explored. It is worth noting that built-in electric field (BIEF) is critical not only to optimize the adsorption/desorption toward reactants and key intermediates, − but also to have positive effects on interface behavior (Figure ).…”