Coordinated regulation on physiochemical performances activated from mixed anionic ligands in a new series of IR NLO materials was systematically investigated.

No abstract

and high catalytic activity, [12] which determine the practical application prospects.There are many methods for directly preparing the NM@C catalysts with controlling particle size and enhancing stability, [13] such as simple pyrolysis, [14] wet chemical methods, [15] and atomic layering deposition. [4,16] However, clear designs on the metal catalysts and carbon supports are still lacking, and their problems also limit the practical application of metal-based nanocatalysts. [17] Therefore, it is urgent to develop simple and effective methods to prepare efficient and stable NM@C catalysts.Inspired by biological structures, a variety of materials utilizing the biological or biomimetic structures are developed. The biological cell wall and cell membrane are natural 2D structures with good ion permeability and exchangeability. Their basic structural units are cellulose, phospholipid bilayers, membrane proteins embedded in bilayers, and sugars and glycolipids bonded to the proteins. Many labile bonds, such as COH, CO, and CN, are included in these structural units. According to these composition and structure, we designed a class of metal nanocatalysts supported on biocarbon by the ion exchange and chemical bond anchoring-in situ carbonization coreduction treatment. During the preparation process, the unstable bonds in the cell wall and the membrane are broken, and a Metal-based nanocatalysts supported on carbon have significant prospect for industry. However, a straightforward method for efficient and stable nanocatalysts still remains extremely challenging. Inspired by the structure and comptosition of cell walls and membranes, an ion chemical bond anchoring, an in situ carbonization coreduction process, is designed to obtain composite catalysts on N-doped 2D carbon (C-N) loaded with various noble and non-noble metals (for example, Pt, Ru, Rh, Pd, Ag, Ir, Au, Co, and Ni) nanocatalysts. These 2 nm particles uniformly and stably bond with the C-N support since the agglomeration and growth are suppressed by anchoring the metal ions on the cell wall and membrane during the carbonization and reduction reactions. The Pt@C-N exhibits excellent catalytic activity and long-term stability for the hydrogen evolution reaction, and the relative overpotential at 100 mA cm −2 is only 77 mV, which is much lower than that of commercial Pt/C and Pt single-atom catalysts reported recently.Metal-based nanocatalysts have an irreplaceable role in energy conversion, [1] chemical production, [2] and automotive exhaust purification. [3] Common metal nanocatalysts include noble metal [4][5][6] or transition metal [7] and alloys, [8] which provide active sites for catalytic reactions. The substrate materials commonly used as supports for metal nanocrystals are oxides, [9] sulfides, [10] and carbon materials, [6,11] which mainly serve to stabilize the catalyst and strengthen charge transfer. Metal-based nanocatalysts using carbon as supports (NM@C) own advantages of low-cost, large specific surface area, good electrical conductivi...