CN110237860B - Anode catalyst for electrolyzing water and urea and preparation method thereof - Google Patents
Anode catalyst for electrolyzing water and urea and preparation method thereof Download PDFInfo
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- CN110237860B CN110237860B CN201910575353.7A CN201910575353A CN110237860B CN 110237860 B CN110237860 B CN 110237860B CN 201910575353 A CN201910575353 A CN 201910575353A CN 110237860 B CN110237860 B CN 110237860B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000004202 carbamide Substances 0.000 title claims abstract description 20
- 239000003054 catalyst Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 11
- 238000005530 etching Methods 0.000 claims abstract description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000001556 precipitation Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 28
- 239000011259 mixed solution Substances 0.000 claims description 19
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims description 2
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 18
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 7
- 229960000999 sodium citrate dihydrate Drugs 0.000 description 5
- 238000001291 vacuum drying Methods 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 239000002086 nanomaterial Substances 0.000 description 4
- -1 potassium ferricyanide Chemical compound 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- HTXDPTMKBJXEOW-UHFFFAOYSA-N iridium(IV) oxide Inorganic materials O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UCFIGPFUCRUDII-UHFFFAOYSA-N [Co](C#N)C#N.[K] Chemical compound [Co](C#N)C#N.[K] UCFIGPFUCRUDII-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 229940011182 cobalt acetate Drugs 0.000 description 1
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 description 1
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical class [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012621 metal-organic framework Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007777 multifunctional material Substances 0.000 description 1
- 239000013110 organic ligand Substances 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/18—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
- B01J31/1805—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
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Abstract
The invention discloses an anode catalyst for electrolyzing water and urea and a preparation method thereof, wherein a PBA cube is synthesized by a precipitation method; etching the PBA cube by using absolute ethyl alcohol by using a hydrothermal method to finally obtain a hollow PBA cube, namely the anode catalyst for electrolyzing water and urea; the preparation method has the advantages of uniform reaction heating, easy control, low cost of used raw materials, easy obtainment of target products, simple and easy operation, good appearance of the obtained PBA with the hollow structure, easy regulation and control, and excellent performance of water electrolysis OER and urea electrolysis UOR.
Description
Technical Field
The invention relates to the field of electrocatalysis, in particular to an anode catalyst for electrolyzing water and urea and a preparation method thereof.
Background
Prussian Blue Analogue (PBA) is a typical face-centered cubic crystal, is a typical porous multifunctional material consisting of metal centers/clusters connected by functional organic ligands, has unique performances of oxidation-reduction property, high surface area and uniform porosity, is applied to the fields of catalysis, sensors, battery electrode materials, ion storage and the like, and has attracted more and more attention in recent years. The PBA can be synthesized by electrochemical deposition and chemical synthesis.
In the field of electrochemical energy storage and conversion, a higher specific surface area can provide more electrochemical active sites and a larger contact area with an electrolyte; the thin shell structure with permeability greatly accelerates the transmission of electrons and ions; the internal hollow structure can effectively relieve the problem of volume expansion caused by ion circulation shuttling and the like. The intrinsic characteristics of the PBA nano-material are improved, and new functions are further endowed to the PBA nano-material, so that the PBA nano-material shows enhanced anode reaction for water electrolysis (OER) activity and excellent stability of anode reaction for urea electrolysis (UOR).
Disclosure of Invention
The invention aims to provide an anode catalyst for electrolyzing water and urea and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of an anode catalyst for electrolyzing water and urea comprises the following steps:
s1, synthesizing a PBA cube by a precipitation method;
and S2, etching the PBA cube by using absolute ethyl alcohol by using a hydrothermal method to finally obtain a hollow PBA cube, namely the anode catalyst for electrolyzing water and urea.
Further, the step S1 includes:
s11, weighing 0.5-1mmol of cobalt metal salt and 0.5-2mmol of sodium citrate hydrate, dissolving in deionized water, and stirring uniformly to obtain a mixed solution;
and S12, adding the mixed solution into a potassium cyanide aqueous solution with a certain concentration while stirring, continuously stirring for 5min, standing for 20-48h, centrifuging the product, washing with deionized water and absolute ethyl alcohol, and drying in vacuum to obtain the PBA cube.
Further, the step S2 includes: weighing a certain amount of PBA cube, dispersing in absolute ethyl alcohol, then pouring into 100-doped 500mg/ml PVP absolute ethyl alcohol solution under continuous stirring, uniformly stirring, transferring the mixed solution into a hydrothermal kettle, reacting at 160-doped 200 ℃ for 6-48h, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum to obtain the hollow PBA cube.
Further, the cobalt metal salt is one or more of nitrate, sulfate, acetate and chloride.
An anode catalyst for electrolysis of water and urea, which has a hollow nanocube structure.
Compared with the prior art, the invention has the following beneficial technical effects:
the preparation method has the advantages of uniform reaction heating, easy control, low cost of used raw materials, easy obtainment of target products, simple and easy operation, good appearance and easy regulation of the obtained PBA with the hollow structure, and excellent electro-catalysis oxygen generation performance, and compared with the PBA cube nano material which is not etched, the hollow cube PBA obtained by the invention through the chemical etching of ethanol has larger specific surface area and exposes more active sites, thereby having more excellent electro-catalysis activity and excellent performance of water electrolysis OER and urea electrolysis UOR.
According to the invention, a hydrothermal method is adopted to chemically etch the PBA cubic structure to form a nano cubic structure with a hollow structure, the uneven surface reactivity of the solid PBA nano cubic structure is the main reason for forming the hollow structure, the etching on the PBA cubic structure preferentially occurs at the vertex, the etching rate is gradually accelerated along the body diagonal direction of the cubic structure, and the hollow nano cubic structure is finally formed, so that the advantages of the structure and the function of the PBA material are maximized, and the application of the metal organic framework in the aspect of urea electrolysis is expanded.
Drawings
FIG. 1 is an XRD pattern of CoFe-PBA prepared in example 1;
FIG. 2 is an SEM image of CoFe-PBA prepared in example 1;
FIG. 3 is a SEM representation of the Hollow CoFe-PBA prepared in example 1;
FIG. 4 is a TEM representation of the Hollow CoFe-PBA prepared in example 1;
FIG. 5 is a graph of LSV curves of CoFe-PBA and Hollow CoFe-PBA prepared in example 1 in a 1M KOH electrolyte;
FIG. 6 is a graph of LSV curves for CoFe-PBA and Hollow CoFe-PBA prepared in example 1 in a 1M KOH and 0.5M urea electrolyte;
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention thereto.
The preparation method of the anode catalyst for electrolyzing water and urea comprises the following steps:
weighing 0.5-1mmol of cobalt metal salt and 0.5-2mmol of sodium citrate hydrate, dissolving in 20ml of deionized water, adding a potassium cyanide aqueous solution while stirring to obtain a mixed solution, standing for a period of time, and centrifuging, washing and drying the product to obtain a PBA cube.
Weighing a certain amount of PBA cube powder, dispersing the PBA cube powder in absolute ethyl alcohol, then pouring the PBA cube powder into 100-fold-500 mg/mL PVP absolute ethyl alcohol solution under continuous stirring, stirring for 15min, transferring the mixed solution into a 50mL hydrothermal kettle, reacting for 6-48h at 160-fold-200 ℃, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum to obtain a hollow PBA cube;
the invention is illustrated in more detail below by means of specific examples:
example 1
Dissolving 143mg of cobalt chloride hexahydrate and 265mg of sodium citrate dihydrate in 20mL of deionized water, adding 20mL of potassium ferricyanide aqueous solution while stirring to obtain a mixed solution, standing for 20h, and centrifuging, washing and vacuum drying the product for 24h to obtain the CoFe-PBA.
Weighing 20mg of the CoFe-PBA powder, dispersing the powder in 20mL of absolute ethyl alcohol, then pouring the powder into 100mg/20mL of PVP absolute ethyl alcohol solution under continuous stirring, stirring for 15min, transferring the mixed solution into a 50mL hydrothermal kettle, reacting for 48h at 180 ℃, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum for 24h to obtain the hollow CoFe-PBA.
FIG. 1 is the XRD pattern of CoFe-PBA, respectively, and it can be seen that diffraction peaks are shown at approximately 17.2, 24.4, 38.1 and 39.1, 42.9, 45.7, 52.5, 53.3, 59.5, respectively, corresponding to the (200), (220), (400), (420), (422), (440), (600) and (620) planes of CoFe-PBA, respectively, indicating the formation of CoFe-PBA.
FIG. 2 is an SEM representation of CoFe-PBA at 100nm magnification, and it can be seen that the synthesized CoFe-PBA has a solid cubic structure, and is uniform in size and distribution.
FIG. 3 is an SEM representation of CoFe-PBA after ethanol etching, and it can be seen that after etching, the CoFe-PBA cube is etched from the vertex and is in a hollow cube structure.
FIG. 4 is a TEM representation of CoFe-PBA after ethanol etching, and it can be clearly seen that the CoFe-PBA after ethanol etching has a hollow structure and the cubic shape is well maintained.
FIG. 5 shows CoFe-PBA, Hollow CoFe-PBA, and noble metal catalyst IrO2The LSV curve chart shows that the prepared hollow CoFe-PBA has good electrocatalytic oxygen production performance in 1M KOH electrolyte, compared with the CoFe-PBA, the OER performance is obviously improved and reaches 10mA/cm2The overpotential is about 338 mV.
FIG. 6 shows CoFe-PBA, Hollow CoFe-PBA, and noble metal catalyst IrO2The LSV curve chart shows that the prepared hollow CoFe-PBA has good electrocatalytic oxygen production performance in alkaline solution, compared with the CoFe-PBA, the UOR performance is obviously improved and reaches 10mA/cm2The overpotential is about 170 mV.
Example 2
Dissolving 175mg of cobalt nitrate hexahydrate and 265mg of sodium citrate dihydrate in 20mL of deionized water, adding 20mL of potassium ferricyanide aqueous solution while stirring to obtain a mixed solution, standing for 48h, and centrifuging, washing and vacuum drying the product for 24h to obtain the CoFe-PBA.
Weighing 20mg of the CoFe-PBA powder, dispersing the powder in 20mL of absolute ethyl alcohol, then pouring the powder into 100mg/20mL of PVP absolute ethyl alcohol solution under continuous stirring, stirring for 15min, transferring the mixed solution into a 50mL hydrothermal kettle, reacting for 48h at 200 ℃, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum for 24h to obtain the hollow CoFe-PBA.
Example 3
Dissolving 106mg of cobalt acetate and 265mg of sodium citrate dihydrate in 20mL of deionized water, adding 20mL of potassium ferricyanide aqueous solution while stirring to obtain a mixed solution, standing for 48h, and centrifuging, washing and vacuum drying the product for 24h to obtain CoFe-PBA.
Weighing 20mg of the CoFe-PBA powder, dispersing the powder in 20mL of absolute ethyl alcohol, then pouring the powder into 200mg/20mL of PVP absolute ethyl alcohol solution under continuous stirring, stirring for 15min, transferring the mixed solution into a 50mL hydrothermal kettle, reacting for 24h at 160 ℃, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum for 24h to obtain the hollow CoFe-PBA.
Example 4
Dissolving 143mg of cobalt chloride hexahydrate and 265mg of sodium citrate dihydrate in 20mL of deionized water, adding 20mL of potassium cobalt cyanide aqueous solution while stirring to obtain a mixed solution, standing for 36h, and centrifuging, washing and vacuum drying the product for 24h to obtain CoCo-PBA.
Weighing 20mg of the CoCo-PBA powder, dispersing the CoCo-PBA powder in 20mL of absolute ethyl alcohol, then pouring the CoCo-PBA powder into 400mg/20mL of PVP absolute ethyl alcohol solution under continuous stirring, stirring for 15min, transferring the mixed solution into a 50mL hydrothermal kettle, reacting for 24h at 180 ℃, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum for 24h to obtain the hollow CoCo-PBA.
Mixed solution example 5
Dissolving 143mg of cobalt chloride hexahydrate and 265mg of sodium citrate dihydrate in 20mL of deionized water, adding 20mL of potassium ferricyanide aqueous solution while stirring to obtain a mixed solution, standing for 36h, and centrifuging, washing and vacuum drying the product for 24h to obtain the CoFe-PBA.
Weighing 20mg of the CoFe-PBA powder, dispersing the powder in 20mL of absolute ethyl alcohol, then pouring the powder into 500mg/20mL of PVP absolute ethyl alcohol solution under continuous stirring, stirring for 15min, transferring the mixed solution into a 50mL hydrothermal kettle, reacting for 6h at 200 ℃, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum for 24h to obtain the hollow CoFe-PBA.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (4)
1. A preparation method of an anode catalyst for electrolyzing water and urea is characterized by comprising the following steps:
s1, synthesizing a PBA cube by a precipitation method;
s11, weighing 0.5-1mmol of cobalt metal salt and 0.5-2mmol of sodium citrate hydrate, dissolving in deionized water, and stirring uniformly to obtain a mixed solution;
s12, adding the mixed solution into a potassium cyanide aqueous solution with a certain concentration while stirring, continuously stirring for 5min, standing for 20-48h, centrifuging the product, washing with deionized water and absolute ethyl alcohol, and drying in vacuum to obtain a PBA cube;
s2, etching the PBA cube by using absolute ethyl alcohol by using a hydrothermal method to finally obtain a hollow PBA cube, namely the anode catalyst for electrolyzing water and urea;
weighing a certain amount of PBA cube, dispersing in absolute ethyl alcohol, then pouring into 100-plus-500 mg/20mL PVP absolute ethyl alcohol solution under continuous stirring, uniformly stirring, transferring the mixed solution into a hydrothermal kettle, reacting at 160-plus-200 ℃ for 6-48h, cooling to room temperature, centrifuging, washing with deionized water and absolute ethyl alcohol, and drying in vacuum to obtain the hollow PBA cube.
2. The method for producing an anode catalyst for electrolysis of water and urea according to claim 1, characterized in that: the cobalt metal salt is one or more of nitrate, sulfate, acetate and chloride.
3. An anode catalyst for electrolysis of water and urea prepared by the process according to any one of claims 1-2.
4. The anode catalyst for electrolysis of water and urea according to claim 3, characterized in that: it is a hollow nanocube structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910575353.7A CN110237860B (en) | 2019-06-28 | 2019-06-28 | Anode catalyst for electrolyzing water and urea and preparation method thereof |
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| CN201910575353.7A CN110237860B (en) | 2019-06-28 | 2019-06-28 | Anode catalyst for electrolyzing water and urea and preparation method thereof |
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| CN110237860A CN110237860A (en) | 2019-09-17 |
| CN110237860B true CN110237860B (en) | 2022-04-29 |
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