Photocatalytic Reduction of CO₂ with H₂O Mediated by Ce-Tailored Bismuth Oxybromide Surface Frustrated Lewis Pairs

Abstract

Photocatalytic reduction of CO2 into available organic compounds has received remarkable attention. However, photocatalytic CO2 reduction is limited to meet industrial application requirements because of the lack of effective photocatalysts. Surface frustrated Lewis pairs (FLP) are found in bismuth oxybromide (BiOBr), which are effective catalytic sites to activate and photocatalytically reduce CO2. Furthermore, the introduction of Ce4+ and oxygen vacancy can optimize both the electronic state and the FLP property of BiOBr. The combined experimental and theoretical characterizations reveal that Ce4+ and O2– can form the frustrated Lewis acid–base pairs, which can catch, excite, and reduce CO2 into CO at a high yield of 50.9 μL h–1, being 9.8 times as large as pristine BiOBr. This work illustrates a rational strategy for both construction of highly efficient photocatalysts and insights into the photocatalytic mechanism at the atomic level.

Zn3Sb4O6F6 and KI-Doped Zn3Sb4O6F6: A Metal Oxyfluoride System for Photocatalytic Activity, Knoevenagel Condensation, and Bacterial Disinfection

“…The radiative or nonradiative electron and hole recombination occurs on the photocatalysts’ surfaces . Numerous attempts have been implemented in the production of low cost, environmentally acceptable photocatalytic materials by tuning band gaps with the variation of different properties, such as composition, structure, phase, size, shape, and surface functionalization for better photocatalytic performance. − …”

Structural Engineering of Donor−π–Acceptor Conjugated Polymers for Facilitating Charge Separation: A Dual-Functional Photocatalysis

“…Moreover, organic solvents, such as acetonitrile and dimethylformamide, are often selected to improve CO 2 solubility. 7 Such processes are unsustainable, limiting their practical applications. The development of efficient photocatalysts to boost the efficiency of CO 2 reduction in pure water without the participation of organic reactants, hole sacrificial agents, and photosensitizers is thus highly desirable.…”

“…Thus, additional hole scavengers and photosensitizers are frequently required to enhance the efficiency. Moreover, organic solvents, such as acetonitrile and dimethylformamide, are often selected to improve CO 2 solubility . Such processes are unsustainable, limiting their practical applications.…”

Co‐Dissolved Isostructural Polyoxovanadates to Construct Single‐Atom‐Site Catalysts for Efficient CO2Photoreduction

“…Solar-driven CO 2 reduction into value-added chemicals and fuels represents one of the most promising solutions to address environmental problems and energy crises. [1][2][3][4][5] To date, numerous efforts have been devoted to rational design and synthesis of efficient catalysts for CO 2 photoreduction, [6][7][8][9][10][11] great progress has been achieved in the past decades, especially for noble metal-based heterogeneous catalysts. [6,7] In this field, heterogeneous catalysts are attractive for their robust durability and excellent recyclability, however, these catalysts usually show size-/shapedependent catalytic activities with rather low atom utilization efficiency.…”