阅读说明：本技术 一种具有光电集成解水制氢活性的纳米异质催化剂 (Nano heterogeneous catalyst with photoelectric integrated water-splitting hydrogen production activity ) 是由 许小勇 王成忠 丁鹏 胡经国 于 2020-04-22 设计创作，主要内容包括：本发明公开了一种具有光电集成解水制氢活性的纳米异质催化剂,该纳米异质催化剂为Ni<Sub>3</Sub>S<Sub>2</Sub>-MoS<Sub>2</Sub>异质二维纳米片催化剂,采用水热法制备,步骤如下：将Na<Sub>2</Sub>MoO<Sub>4</Sub>和C<Sub>2</Sub>H<Sub>5</Sub>NS的混合溶液置于高压反应釜中,将泡沫镍浸入混合溶液中,升温至200℃,水热反应20小时,自然冷却至室温,清洗、真空干燥,获得所述的纳米异质催化剂。该催化剂通过耦联双重活性,集成可再生太阳能助推电解水,能够直接降低分解水制氢工艺成本,而且,双活性催化剂呈现了新颖的自然集成光电催化技术,区别于传统的光敏半导体和助催化剂复合集成的光电化学电极,基于该类催化剂的光电功能集成将革新水分解制氢技术,提高能量转化效率,降低工艺成本。(The invention discloses a nano heterogeneous catalyst with the activity of hydrogen production by photoelectricity integrated water decomposition, which is Ni 3 S 2 ‑MoS 2 The heterogeneous two-dimensional nanosheet catalyst is prepared by a hydrothermal method and comprises the following steps: mixing Na 2 MoO 4 And C 2 H 5 And placing the mixed solution of NS in a high-pressure reaction kettle, soaking foamed nickel into the mixed solution, heating to 200 ℃, carrying out hydrothermal reaction for 20 hours, naturally cooling to room temperature, cleaning, and carrying out vacuum drying to obtain the nano heterogeneous catalyst. The catalyst integrates renewable solar boosting electrolysis water through coupling dual activity, can directly reduce the process cost of hydrogen production by decomposing water, and is different from the traditional photosensitive semiconductor and the traditional natural integrated photoelectrocatalysis technologyThe photoelectrochemical electrode compositely integrated by the cocatalyst improves the water decomposition hydrogen production technology based on the photoelectric function integration of the catalyst, improves the energy conversion efficiency and reduces the process cost.)

1. A preparation method of a nano heterogeneous catalyst with the activity of hydrogen production by photoelectricity integrated water decomposition is characterized by adopting a hydrothermal method for preparation, and comprising the following steps:

mixing Na₂MoO₄And C₂H₅And placing the mixed solution of NS in a high-pressure reaction kettle, soaking foamed nickel into the mixed solution, heating to 200 ℃, carrying out hydrothermal reaction for 20 hours, naturally cooling to room temperature, cleaning, and carrying out vacuum drying to obtain the nano heterogeneous catalyst.

2. The method of claim 1, wherein the solution is mixed with Na₂MoO₄And C₂H₅The molar ratio of NS is 2: 9.

3. The method of claim 1, wherein the foamed nickel has a size of 1cm × 3cm, and the oxide layer is removed by ultrasonic cleaning with acetone, 3M hydrochloric acid, ethanol, and deionized water for 10min each.

4. The method of claim 1, wherein the drying is performed under vacuum at 60 ℃.

5. The nanometer heterogeneous catalyst with the activity of preparing hydrogen by photoelectricity integrated water decomposition is characterized by being Ni₃S₂-MoS₂Heterogeneous two-dimensional nanosheet catalyst, prepared using the method of any one of claims 1-4.

6. The nano-heterogeneous catalyst according to claim 5, wherein the catalyst has a photoelectric coupling effect.

7. The application of the nano heterogeneous catalyst in the two-electrode photoelectric integrated hydrolyzer according to claim 5, wherein two pieces of foamed nickel on which the nano heterogeneous catalyst grows are respectively used as oxidation and reduction reaction electrodes to construct a two-electrode hydrolysis system.

Technical Field

The invention relates to a nano heterogeneous catalyst with the activity of photoelectric integrated water-splitting hydrogen production, belonging to the field of nano energy functional materials.

Background

The hydrogen has a series of advantages of high energy density, storage and movement, convenience for reforming and conversion, no pollution in combustion and the like, and is considered as an ideal green energy carrier. In the current hydrogen production process, water electrolysis technology relying on active catalysts is a feasible solution for producing high-purity hydrogen, and noble metal-based platinum (Pt) and iridium oxide (IrO)₂) Or ruthenium oxide (RuO)₂) Are currently the most effective hydrogen and oxygen evolution catalysts, respectively, however their rarity and high price have limited the development of water electrolysis hydrogen production technologies. Therefore, the development of low-cost, efficient and stable catalysts becomes a prerequisite for the development of the current water electrolysis hydrogen production industry. Moreover, renewable energy sources such as solar energy, wind energy and the like are integrated to drive a water electrolysis reaction path, so that the hydrogen production cost can be further reduced, and the hydrogen production device has remarkable sustainable development capability.

Disclosure of Invention

The invention aims to provide a nano heterogeneous catalyst with photoelectrocatalysis dual activity.

The technical solution for realizing the purpose of the invention is as follows: the invention relates to a nano heterogeneous catalyst with the activity of hydrogen production by photoelectricity integrated water decomposition, which is Ni₃S₂-MoS₂The heterogeneous two-dimensional nanosheet catalyst is prepared by a hydrothermal method and comprises the following steps:

mixing Na₂MoO₄And C₂H₅And placing the mixed solution of NS in a high-pressure reaction kettle, soaking foamed nickel into the mixed solution, heating to 200 ℃, carrying out hydrothermal reaction for 20 hours, naturally cooling to room temperature, cleaning, and carrying out vacuum drying to obtain the nano heterogeneous catalyst.

Preferably, in the mixed solution, Na₂MoO₄And C₂H₅The molar ratio of NS is 2: 9.

Preferably, the size of the foamed nickel is 1cm × 3cm, and the oxide layer is removed by ultrasonic cleaning with acetone, 3M hydrochloric acid, ethanol and deionized water for 10 min.

Preferably, the drying is carried out under vacuum at 60 ℃.

The application of the nano heterogeneous catalyst in the two-electrode photoelectric integrated hydrolyzer is to respectively use two pieces of foamed nickel with the nano heterogeneous catalyst as oxidation and reduction reaction electrodes to construct a two-electrode hydrolysis system.

Compared with the prior art, the invention has the beneficial effects that: 1. the preparation raw materials are cheap, the process is simple, the industrial expansion can be realized, and compared with a noble metal-based catalyst, the catalyst has a remarkable cost advantage; 2. ni₃S₂-MoS₂The heterogeneous catalyst has excellent full water splitting activity; 3. ni₃S₂-MoS₂The heterogeneous catalyst has unique photoelectric coupling effect, and the constructed double-electrode water electrolyser shows excellent reaction activity and stability of hydrogen production by photoelectric integrated water splitting, and can directly integrate solar boosting water electrolysis efficiency; 4. the photoelectric function integration based on the catalyst can reform the water decomposition hydrogen production technology, improve the energy conversion efficiency and reduce the process cost.

Drawings

FIG. 1 is an X-ray diffraction pattern of the disclosed nano-heterogeneous catalyst.

FIG. 2 is a transmission electron micrograph of the nano-heterogeneous catalyst of the present disclosure.

FIG. 3 is a schematic view of a two-electrode photoelectric integrated hydrolyzer device designed by the present invention.

FIG. 4 is a timing current diagram of the performance test of the two-electrode photoelectric integrated hydrolyzer designed by the present invention.

Detailed Description

The invention discloses a transition metal sulfide-based nano heterogeneous catalyst which has photoelectric coupling effect, namely photoelectric dual catalytic activity, can be used for integrating solar boosting water electrolysis efficiency and directly reduces the process cost of hydrogen production by decomposing water.

The following implementation process comprises the following steps: (1) hydrothermal method for preparing nano Ni₃S₂-MoS₂A heterogeneous two-dimensional nanosheet catalyst; (2) designing a two-electrode photoelectric integrated hydrolyzer to show nano heterogeneous Ni₃S₂-MoS₂Photocoupling advantages of the catalyst.