Atomically and electronically coupled Pt and CoO hybrid nanocatalysts are fabricated for electrocatalytic oxygen reduction reaction. The atomic coupling between the Pt and the CoO endows precise control of the atomic interface between the Pt and the CoO, which directly results in electron donation from the CoO to the Pt, and thus favorable tuning of the electronic structure of the Pt.

Laser ablation in liquids has been, for the first time, employed to produce oxygen vacancy-modified CoOOH nanosheets for efficient water oxidation.

As a low-cost and promising electrocatalyst for hydrogen evolution reaction (HER), molybdenum disulfide (MoS 2 ) possesses both an inert basal plane and catalytically active edges. As a result, considerable efforts have been made to activate the MoS 2 basal plane for improving the HER activity. Herein, we first employed laser ablation in liquid to create plentiful sulfur (S)-vacancies in the basal plane of 2H-MoS 2 nanosheets under ambient conditions. The experimental measurements and theoretical calculations prove that S vacancies in the basal plane can serve as the additional active sites and optimize the free energy change for hydrogen adsorption (ΔG H* ) at the same time. As a result, in comparison with pristine MoS 2 (P-MoS 2 ), laser treated MoS 2 (L-MoS 2 ) realizes a significant improvement in the HER activity. Our work represents a facile method to enhance the catalytic performance of 2H-MoS 2 nanosheets and may help to guide the synthesis of other efficient two-dimensional metal chalcogenide catalysts.

Photocatalytic Reactions of Typical Alcohols under Different Conditions and the Hydrogen Kinetic Isotope Effects (KIEs)……………………………………………………………….…S2-S8 UV-Vis Absorption Spectroscopies of Copper/Solvents Systems…………………………...……S9 Isotopic Experimental Section…………………………………………………...……………… S10 Mechanism of the Dehydrogenation Reactions by Copper Complex and Pt/TiO 2 ……….S11-S12 Mass Spectra Corresponding to the Products of Different Reactions………………….…S13-S33

Titanium dioxide (TiO2) as a common photothermal material usually faces with low photothermal conversion efficiency, mainly owing to the little utilization of visible (Vis) and near-infrared (NIR) light in the solar spectrum. Introducing oxygen vacancies is an effective strategy for narrowing its bandgap and thus enhancing the light absorption capacity. However, traditional approaches are always not energy-efficient or unable to create enough oxygen vacancies. Herein, laser ablation in liquid (LAL) was successfully employed to prepare rutile TiO2 nanoparticles (NPs) with abundant oxygen vacancies in one step, which were then assembled into the self-floating evaporator. Our experimental results demonstrate that the existence of oxygen vacancies narrows the bandgap and forms conduction band tail states, leading to significant improvements of light absorbance and photothermal conversion efficiency. Moreover, the light trapping structure of nickel foam (NF) support also contributes to the high solar absorption of laser TiO2 (L-TiO2)/NF. Eventually, the L-TiO2/NF evaporator realizes an excellent water evaporation rate of 1.25 kg m–2 h–1 and light-to-water evaporation efficiency of 78.5% under one-sun irradiation, which are both 1.81 times than those of commercial TiO2 (C-TiO2)/NF and even surpass those of most recently reported titanium oxide-based evaporators.