Herein, we explore ag eneral Cu 2Àx Sn anocube template-assisted and reverse cation exchange-mediated growth strategy for fabricating hollowmultinary metal sulfide. Unlike the traditional cation exchange method controlled by the metal sulfide constant, the introduction of tri-n-butylphosphine (TBP) can reverse cation exchange to give as eries of hollowm etal sulfides.Avariety of hollowm ultinary metal sulfide cubic nanostructures has been demonstrated while preserving anisotropic shapes to the as-synthesized templates, including binary compounds (CdS,Z nS,A g 2 S, PbS,S nS), ternary compound (CuInS 2 ,Z n x Cd 1Àx S), and quaternary compound (single-atom platinum anchored Zn x Cd 1Àx S; Zn x Cd 1Àx S-Pt 1 ). Experimental and density functional theory (DFT) calculations showt hat the hollowm etal sulfide semiconductors obtained could significantly improve the separation and migration of photogenerated electron-hole pairs.Owing to the efficient charge transfer,t he Zn x Cd 1Àx S-Pt 1 exhibited outstanding photocatalytic performance of CO 2 to CO,w ith the highest CO generation rate of 75.31 mmol h À1 .

As an effective approach toward sustainability and global carbon balance, the reductive conversion of CO2 into value-added chemicals is of considerable significance. Here, by simply calcining the mixture of NH4SCN and KCl in an air atmosphere, potassium dopants and negatively charged electron-rich centers are simultaneously introduced into carbon nitride materials via a metalation engineering strategy. The resultant metalized catalysts with deprotonated imide sites and doped potassium ions demonstrate much-enhanced activity for catalyzing CO2 reductive hydrosilylation with excellent conversion and >90% selectivity, whereas the pristine carbon nitride catalyst shows only negligible activity. Both experimental and theoretical results reveal the crucial role of the negatively charged electron-rich centers and potassium dopants in tailoring the energy band positions and electronic structure for the efficient donor–acceptor interaction and much increased driving force for CO2 reduction. The present work offers molecular-level insights into the boosted CO2 reduction activity via engineering the electronic structure of the metalized carbon nitride catalyst and reducing the energy offset between frontier molecular orbitals of CO2 and the catalyst, which can provide a conceptual guide for further development of efficient catalytic CO2 reduction systems.

The electrocatalytic oxygen reduction reaction (2e− ORR) via a two-electron process is a promising pathway for the production of hydrogen peroxide (H2O2). Here, we systematically investigated the 2e− ORR process on graphdiyne (GDY) supported single transition metal atoms (TM1@GDY) using density functional theory (DFT) calculations. Among the 23 TM1@GDY catalysts, Pt1@GDY showed the best performance for the H2O2 product with an overpotential as low as 0.15 V. The electronic structure analysis, on the one hand, elucidates that the electron transfer between Pt1@GDY and the adsorbed O2 facilitates the activation of O2, and, on the other hand, reveals that the high 2e− ORR activity of Pt1@GDY lies in the transfer of electrons from the filled Pt-3d orbitals to the 2p antibonding orbitals of OOH*, which effectively activates the O–O bond. This work provides insights to design efficient electrocatalysts for H2O2 generation.

Herein, we explore a general Cu2−xS nanocube template‐assisted and reverse cation exchange‐mediated growth strategy for fabricating hollow multinary metal sulfide. Unlike the traditional cation exchange method controlled by the metal sulfide constant, the introduction of tri‐n‐butylphosphine (TBP) can reverse cation exchange to give a series of hollow metal sulfides. A variety of hollow multinary metal sulfide cubic nanostructures has been demonstrated while preserving anisotropic shapes to the as‐synthesized templates, including binary compounds (CdS, ZnS, Ag2S, PbS, SnS), ternary compound (CuInS2, ZnxCd1−xS), and quaternary compound (single‐atom platinum anchored ZnxCd1−xS; ZnxCd1−xS‐Pt1). Experimental and density functional theory (DFT) calculations show that the hollow metal sulfide semiconductors obtained could significantly improve the separation and migration of photogenerated electron‐hole pairs. Owing to the efficient charge transfer, the ZnxCd1−xS‐Pt1 exhibited outstanding photocatalytic performance of CO2 to CO, with the highest CO generation rate of 75.31 μmol h−1.

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