3D Hydrangea‐like InVO₄/Ti₃C₂T_x Hierarchical Heterosystem Collaborating with 2D/2D Interface Interaction for Enhanced Photocatalytic CO₂ Reduction

Abstract 3D hydrangea‐like InVO₄/Ti₃C₂T_x heterosystem is fabricated by in‐situ growth of InVO₄ on Ti₃C₂T_x and on spot self‐assembly. The formation of a hierarchical architecture collaborating with well‐defined 2D/2D interfacial interaction is constructed by optimizing the ratio of Ti₃C₂T_x incorporated in the formation of InVO₄. The as‐obtained InVO₄/Ti₃C₂T_x presents improved photon trapping capacity and exposure of reactive sites owing to the enhanced BET specific surface areas, and the capture capacity towards CO₂ is strengthened coordinated with the basic feature of Ti₃C₂T_x. Based on DFT calculations, the electron transfer from InVO₄ to Ti₃C₂T_x is demonstrated, and the unique 2D/2D interface interaction in InVO₄/Ti₃C₂T_x heterosystem efficiently improves the separation of photogenerated charge carriers. As a result, the 3D hierarchical InVO₄/Ti₃C₂T_x heterosystem presents 13.83 μmol g⁻¹ h⁻¹ of CO production (3.1‐folds of pristine InVO₄) with 92% selectivity and superior stability. The 3D hierarchical design collaborating with 2D/2D interfacial interaction provides a new avenue to develop ideal catalysts for artificial photosynthesis.