Hollow core-shell heterojunction TAPB-COF@ZnInS as highly efficient photocatalysts for carbon dioxide reduction.

The conversion of carbon dioxide (CO) into carbon-neutral fuels using solar energy is crucial for achieving energy sustainability. However, the high carrier charge recombination and low CO adsorption capacity of the photocatalysts present significant challenges. In this paper, a TAPB-COF@ZnInS-30 (TAPB-COFZ-30) heterojunction photocatalyst was constructed by growth of ZnInS (ZIS) on a hollow covalent organic framework (HCOF) with a hollow core-shell structure for CO to CO conversion.

BiVO-Based Heterojunction Photocathode for High-Performance Photoelectrochemical Hydrogen Peroxide Production.

Photoelectrochemical (PEC) cells provide a promising solution for the synthesis of hydrogen peroxide (HO). Herein, an integrated photocathode of p-type BiVO (p-BVO) array with tetragonal zircon structure coupled with different metal oxide (MO, M = Sn, Ti, Ni, and Zn) heterostructure and NiNC cocatalyst (p-BVO/MO/NiNC) was synthesized for the PEC oxygen reduction reaction (ORR) in production of HO. The p-BVO/SnO/NiNC array achieves the production rate 65.

Engineering single-atom active sites anchored covalent organic frameworks for efficient metallaphotoredox CN cross-coupling reactions.

Photoredox catalysis has become an indispensable solution for the synthesis of small organic molecules. However, the precise construction of single-atomic active sites not only determines the catalytic performance, but also avails the understanding of structure-activity relationship. Herein, we develop a facile approach to immobilize single-atom Ni sites anchored porous covalent organic framework (COF) by use of 4,4',4″-(1,3,5-triazine-2,4,6-triyl)trianiline and 2,6-diformylpyridine (Ni SAS/TD-COF).

Engineering Single-Atom Active Sites on Covalent Organic Frameworks for Boosting CO Photoreduction.

Solar carbon dioxide (CO) conversion is an emerging solution to meet the challenges of sustainable energy systems and environmental/climate concerns. However, the construction of isolated active sites not only influences catalytic activity but also limits the understanding of the structure-catalyst relationship of CO reduction. Herein, we develop a universal synthetic protocol to fabricate different single-atom metal sites (e.

Engineering MoO /MXene Hole Transfer Layers for Unexpected Boosting of Photoelectrochemical Water Oxidation.

The development of semiconductor photoanodes is of great practical interest for the realization of photoelectrochemical (PEC) water splitting. Herein, MXene quantum dots (MQD) were grafted on a BiVO substrate, then a MoO layer by combining an ultrathin oxyhydroxide oxygen evolution cocatalyst (OEC) was constructed as an integrated photoanode. The OEC/MoO /MQD/BiVO array not only achieves a current density of 5.

Engineering Single-Atomic Ni-N-O Sites on Semiconductor Photoanodes for High-Performance Photoelectrochemical Water Splitting.

Direct photoelectrochemical (PEC) water splitting is a promising solution for solar energy conversion; however, there is a pressing bottleneck to address the intrinsic charge transport for the enhancement of PEC performance. Herein, a versatile coupling strategy was developed to engineer atomically dispersed Ni-N sites coordinated with an axial direction oxygen atom (Ni-N-O) incorporated between oxygen evolution cocatalyst (OEC) and semiconductor photoanode, boosting the photogenerated electron-hole separation and thus improving PEC activity. This state-of-the-art OEC/Ni-N-O/BiVO photoanode exhibits a record high photocurrent density of 6.

Two-Dimensional Defective Boron-Doped Niobic Acid Nanosheets for Robust Nitrogen Photofixation.

Direct nitrogen photofixation is a feasible solution toward sustainable production of ammonia under mild conditions. However, the generation of active sites for solar-dirven nitrogen fixation not only limits the fundamental understanding of the relationship among light absorption, charge transfer, and catalytic efficiency but also influences the photocatalytic activity. Herein, we report two-dimensional boron-doped niobic acid nanosheets with oxygen vacancies (B-V-HNbO NSs) for efficient N photofixation in the absence of any scavengers and cocatalysts.

Engineering Lattice Oxygen Activation of Iridium Clusters Stabilized on Amorphous Bimetal Borides Array for Oxygen Evolution Reaction.

Developing robust oxygen evolution reaction (OER) catalysts requires significant advances in material design and in-depth understanding for water electrolysis. Herein, we report iridium clusters stabilized surface reconstructed oxyhydroxides on amorphous metal borides array, achieving an ultralow overpotential of 178 mV at 10 mA cm for OER in alkaline medium. The coupling of iridium clusters induced the formation of high valence cobalt species and Ir-O-Co bridge between iridium and oxyhydroxides at the atomic scale, engineering lattice oxygen activation and non-concerted proton-electron transfer to trigger multiple active sites for intrinsic pH-dependent OER activity.

Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting.

Rational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control of active sites is essential for electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding of catalytic mechanisms.

Conformal Macroporous Inverse Opal Oxynitride-Based Photoanode for Robust Photoelectrochemical Water Splitting.

Direct photoelectrochemical (PEC) water splitting is of prime importance in sustainable energy conversion systems; however, it is a big challenge to simultaneously control light harvesting and charge transport for the improvement of PEC performance. Herein, we report a three-dimensional ordered macroporous (3DOM) CsTaWON inverse opal array as a promising candidate for the first time. To address the critical challenge, an ultrathin carbon-nitride-based layer-intercalated 3DOM CsTaWON architecture as a conformal heterojunction photoanode was assembled.

Engineering active sites on hierarchical transition bimetal oxides/sulfides heterostructure array enabling robust overall water splitting.

Rational design of the catalysts is impressive for sustainable energy conversion. However, there is a grand challenge to engineer active sites at the interface. Herein, hierarchical transition bimetal oxides/sulfides heterostructure arrays interacting two-dimensional MoO/MoS nanosheets attached to one-dimensional NiO/NiS nanorods were fabricated by oxidation/hydrogenation-induced surface reconfiguration strategy.