Sulfur-Mediated Microenvironment Modulation of High-Density Fe-N Sites for High-Efficiency Oxygen Reduction and Cryotolerant Quasi-Solid-State Zinc-Air Batteries.

Single-atom catalysts (SACs) featuring Fe-N active sites hold significant potential for the oxygen reduction reaction (ORR). However, achieving high-density Fe-N active sites while precisely modulating their microenvironment to enhance ORR activity remains a formidable challenge. Here, an S-mediated strategy is presented for the preparation of Fe single-atom-loaded S,N-doped carbon (FeNSC).

Ce(III)-Doped Mixed-Valence Metal-Organic Frameworks Boosting Ligand-To-Metal Charge Transfer for Photooxidation of a Mustard-Gas Simulant.

Due to the high toxicity and potential threats to society, extensive efforts are devoted to developing catalysts for efficient photodegradation of mustard gas. Metal-organic frameworks (MOFs) are considered as promising candidates for photooxidation, but the limited charge separation efficiency of the pristine MOFs restricts their further applications. Herein, through a one-pot synthesis strategy, Ce(III) ions are incorporated in a Ti-based porphyrin MOF (DGIST-1), leading to a mixed-valence MOF with enhanced charge transfer efficiency.

Asymmetric Mn/Fe Dual Single-Atom Catalysts for pH-Universal Oxygen Electroreduction and Sustainable Metal-Air Batteries.

Conquering the sluggish kinetics of the oxygen reduction reaction (ORR) is significantly important for sustainable metal-air batteries. However, the synthesis of advanced Pt-free ORR electrocatalysts still remains challenging owing to the intrinsic activity, site accessibility, and structural stability. Herein, a catalyst of asymmetric N, P-coordinated Mn and Fe dual single atoms supported on hollow carbon polyhedra (MnFe-PNC) is synthesized via a metal-organic framework pyrolysis strategy, which displays excellent pH-universal ORR performance with half-wave potentials of 0.

Synergistic Catalysis by Cu Single Atoms and Atomically Cu-Doped Au Nanoparticles in a Metal-Organic Framework for Photocatalytic CO Reduction to CH.

Photocatalytic CO reduction to C hydrocarbons is considered more valuable and yet highly challenging due to the multielectron process and sluggish kinetics of C-C coupling, which requires multiple active sites to work synergistically. In this work, through a photodeposition method, Cu single-atom sites and atomically Cu-doped Au nanoparticles were simultaneously anchored on a photoactive metal-organic framework (MOF) with mesoporous channels, closely integrating distinct sites within a confined environment. Thanks to the electron accumulation of plasmonic metal nanoparticles and the synergy among different active sites, this MOF composite can achieve efficient photocatalytic reduction of CO to CH with a production rate as high as 69.

Rational Design of a Quasi-Metal-Organic Framework by Ligand Engineering for Efficient Biomass Upgrading.

The electrooxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), a monomer for degradable bioplastic, is a promising strategy for biomass upgrade and yet requires well-designed catalysts with high efficiency and selectivity. Taking advantage of the open metal sites of metal-organic frameworks (MOFs), quasi-MOFs represent viable catalysts, but the poor designability and unpredictable structures hinder their development. In this work, a Ni-based quasi-MOF was rationally designed and synthesized by controlled ligand engineering.

2D-on-2D Al-Doped NiCo LDH Nanosheet Arrays for Fabricating High-Energy-Density, Wide Voltage Window, and Ultralong-Lifespan Supercapacitors.

Battery-type electrode materials with high capacity, wide potential windows, and good cyclic stability are crucial to breaking through energy storage limitations and achieving high energy density. Herein, a novel 2D-on-2D Al-doped NiCo layered double hydroxide (NiCoAl LDH) nanosheet arrays with high-mass-loading are grown on a carbon cloth (CC) substrate via a two-step hydro/solvothermal deposition strategy, and the effect of Al doping is employed to modify the deposition behavior, hierarchical morphology, phase stability, and multi-metallic synergistic effect. The optimized NiCoAl LDH electrode exhibits capacities of 5.

Regulating the Electronic Structure of Bismuth Nanosheets by Titanium Doping to Boost CO Electroreduction and Zn-CO Batteries.

The electrochemical carbon dioxide reduction reaction (E-CO RR) to formate is a promising strategy for mitigating greenhouse gas emissions and addressing the global energy crisis. Developing low-cost and environmentally friendly electrocatalysts with high selectivity and industrial current densities for formate production is an ideal but challenging goal in the field of electrocatalysis. Herein, novel titanium-doped bismuth nanosheets (TiBi NSs) with enhanced E-CO RR performance are synthesized through one-step electrochemical reduction of bismuth titanate (Bi Ti O ).

Hydrogen-bond induced and hetero coupling dual effects in N-doped carbon coated CrN/Ni nanosheets for efficient alkaline freshwater/seawater hydrogen evolution.

Developing efficient and robust non-precious-metal-based hydrogen evolution reaction (HER) catalysts is highly desirable but remains quite challenging for alkaline freshwater/seawater electrolysis. In the present study, we report a theory-guided design and synthesis of a nickel foam (NF) supported N-doped carbon-coated (NC) nickel (Ni)/chromium nitride (CrN) nanosheets (NC@CrN/Ni) as a highly active and durable electrocatalyst. Our theoretical calculation firstly reveals that CrN/Ni heterostructure can greatly promote the HO dissociation via hydrogen-bond induced effect, and the N site can be optimized by hetero coupling to achieve a facile hydrogen associative desorption, thereby significantly boosting alkaline HER.

Restrictive Regulation of Ionic Liquid Quaternary Ammonium Salt in SBA-15 Pore Channel for Efficient Carbon Dioxide Conversion.

Herein, the synthesis of a new type of catalyst, SBA-M (Schiff complex of different metal types grafted on SBA-15) based on a quaternization reaction, is described. Various amounts of ionic liquid were grafted into the pore channels of SBA-15 using the post-grafting method, which allowed the ionic liquid to be grafted into the pore channels restrictively. Notably, over six cycles, SBA-Mn (0.

Heterointerface and Defect Dual Engineering in a Superhydrophilic NiP/WO Microsphere for Boosting Alkaline Hydrogen Evolution Reaction at High Current Density.

Developing a high-performance electrocatalyst for hydrogen evolution reaction (HER) requires a comprehensive consideration of the three key factors, that is, intrinsic activity, electric conductivity, and active site number. Herein, we report the facile synthesis of a self-supported NiP/WO heterointerface microsphere as a highly active and low-cost catalyst for alkaline HER, which has simultaneously addressed these key issues by a joint application of heterointerface construction and defect and architecture engineering strategies. Our density functional theory calculations revealed NiP and WO optimized by the interface coupling effect work in concert to improve the intrinsic activity of the catalyst.

Tuning d-Band Center of Pt by PtCo-PtSn Heterostructure for Enhanced Oxygen Reduction Reaction Performance.

The development of efficient and stable Pt-based catalysts is significant but challenging for fuel cells. Herein, Sn and Co elements are introduced into Pt to form PtCo-PtSn/C heterostructure for enhancing the oxygen reduction reaction (ORR). Electrochemical results indicate that it has remarkable ORR intrinsic activity with a high mass activity (1,158 mA mg Pt) at 0.

Sulfur Vacancy and Ti C T Cocatalyst Synergistically Boosting Interfacial Charge Transfer in 2D/2D Ti C T /ZnIn S Heterostructure for Enhanced Photocatalytic Hydrogen Evolution.

Constructing an efficient photoelectron transfer channel to promote the charge carrier separation is a great challenge for enhancing photocatalytic hydrogen evolution from water. In this work, an ultrathin 2D/2D Ti C T /ZnIn S heterostructure is rationally designed by coupling the ultrathin ZnIn S with few-layered Ti C T via the electrostatic self-assembly strategy. The 2D/2D Ti C T /ZnIn S heterostructure possesses larger contact area and strong electronic interaction to promote the charge carrier transfer at the interface, and the sulfur vacancy on the ZnIn S acting as the electron trap further enhances the separation of the photoinduced electrons and holes.

Design and preparation of three-dimensional hetero-electrocatalysts of NiCo-layered double hydroxide nanosheets incorporated with silver nanoclusters for enhanced oxygen evolution reactions.

Layered double hydroxides (LDHs) are one of the most effective electrocatalysts. However, it is still necessary to improve the lower conductivity and limited active sites of LDHs to enhance their catalytic performance. Targeted generation of vacancies on the catalyst's surface by the incorporation of metal nanoparticles has been explored as a promising strategy to synthesize highly efficient electrocatalysts.

Mn-Modified CuO, CuFeO, and γ-FeO Three-Phase Strong Synergistic Coexistence Catalyst System for NO Reduction by CO with a Wider Active Window.

A series of samples with the precursor's molar ratio of {KMnO}/{CuFeO} = 0, 0.008, 0.010, 0.