Method for preparing metal monatomic-graphene composite material
A composite material, graphene technology, applied in graphene, non-metallic elements, chemical instruments and methods, etc., can solve the problems of difficult to achieve industrialized mass preparation, low Ni loading, etc., achieve large loading, uniform distribution, Actionable strong effect
Pending Publication Date: 2021-12-24
DALIAN UNIV
View PDF0 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
First, use (NH 4 ) 2 SO 4 Solution precipitation of Ni 30 mn 70 Mn in the alloy, Ni with nanopores was prepared; then, the nanoporous Ni was treated with H at 800°C 2 / Ar flow protection for reduction treatment; after that, use H 2 / Ar gas flow into benzene, graphene is synthesized on the surface of nanoporous Ni; finally, metal Ni is dissolved with 2.0M HCl solution, and the remaining Ni is the metal single atom anchored on graphene. This method is also difficult to realize large-scale industrialization. Batch preparation with very low Ni loading
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0039] Example 1 Self-synthesized hydrogen-rich graphene-supported metal single atom-graphene composite material
[0040] 1. Preparation of hydrogen-rich graphene carrier:
[0041] (1.1) Low-temperature reaction: Take a clean beaker (2.5L), add 230mL of concentrated sulfuric acid and 5.0g of sodium nitrate into it, stir and mix well under ice bath, when the temperature is lower than 5°C, add 10.0g of graphite powder, mix evenly 2.5h; then weigh 30.0g potassium permanganate (KMnO 4 ), slowly added to the mixture system, and the temperature of the system should not be higher than 20°C during the addition;
[0042] (1.2) Medium-temperature reaction: transfer the beaker in step (1.1) to a constant temperature water bath at 35°C, and continue heating and stirring for 2 hours;
[0043] (1.3) High temperature reaction: Take out the beaker and add 460mL deionized water to it, stir evenly, at this time sulfuric acid dilution will release heat, then put the beaker into the oil bath, h...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| Specific surface area | aaaaa | aaaaa |
| Specific surface area | aaaaa | aaaaa |
| Water absorption | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a method for preparing a metal monatomic-graphene composite material. According to the preparation method, hydrogen-rich graphene is taken as a carrier, a large number of metal monoatoms are embedded into hydrogen-rich graphene crystal lattices by adopting a dipping-roasting method, and the metal monoatom-graphene composite material is prepared. Due to the fact that a low-temperature etching step is added when graphene is prepared, and the solubility of salt and the wettability of graphene are compatible during dipping, the preparation method of the metal monatomic-graphene composite material is simple, the atom utilization rate is high, the prepared metal monatomic-graphene composite material has the characteristics of large metal monatomic loading capacity and relatively uniform distribution, and the material is roasted at a nitrogen atmosphere of 500 DEG C, the loaded metal monatomic stability is good, and the metal monatomic-graphene composite material has very high industrial application value.
Description
technical field [0001] The invention relates to a method for preparing a metal single atom-graphene composite material, in particular to a material for supporting a metal single atom on graphene and a preparation method for the material. Background technique [0002] Graphene-based nanomaterials are considered to be the most promising materials of the twenty-first century. Graphene composites have shown excellent catalytic performance in the field of catalysis. Graphene with a large specific surface area, open two-dimensional structure and good electrical conductivity can not only be used as a catalyst carrier, but also be able to adjust the physical and chemical properties of these metal components after compounding with Fe, Co, Ni, Pt, Pd and other metal single atoms. Properties, such as directional hydrogenation performance, acid and alkali resistance, hydrothermal environment resistance, oxidation deactivation resistance, etc. Fe, Co, Ni and other transition metals can ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): B01J23/75C01B32/19C01B32/194B01J37/02B01J37/08
CPCB01J23/75B01J37/0201B01J37/08C01B32/19C01B32/194
Inventor 周锦霞贾玉峰毛璟博李慎敏尹静梅
Owner DALIAN UNIV