新型阳极析氧催化剂耦合半导体Si的光解水性能研究
发布时间：2018-11-09 17:59
【摘要】：太阳能具有分布广泛、储量多、清洁无污染等优点，是一种能很好满足人类能源需求的可再生能源，而氢能是一种无污染、易储存且燃烧热值高的二次能源，，因此将太阳能转化为氢能成为了一种很有前景的高效利用能源的一种途径。 硅储量十分丰富、硅光伏电池太阳能转换效率不断提高、生产成本不断下降，都促使太阳能光伏发电在能源、环境和人类社会未来发展中占据重要地位。光伏电池技术与电解水技术相结合，实现光伏发电和光解水制氢两个绿色能源生产方式的结合，光伏发电的同时制氢、储氢，氢燃料再用于补充黑夜和阴天的发电需要，为太阳能的利用提供了新的路径。 本文将Si光伏电池与阳极析氧催化剂（OEC）相结合在近中性的环境下光解水制氢气。采用原位制备的方法，分别在Si光伏材料上电沉积形成了Co-Bi，Ag-Bi和Ag-Ci阳极析氧催化剂，有效抑制Si光伏半导体光生电荷复合，实现了在近中性环境，模拟太阳光照射下水分解制氢气。采用XRD，SEM，EDS，XPS等表征手段分析光电阳极的组成及形貌，并使用多种光电化学测试手段对光电阳极的光催化性能以及稳定性进行分析。主要研究内容如下： （1）采用了原位电解沉积的方法，以硅光伏电池（3jun-a-Si）作为基体，常温常压下在包含Co2+和K2B4O7（pH=9.2）的电解质溶液中原位制备了Co-Bi析氧催化剂（Co-OEC），该催化剂是一层在3jun-a-Si基体表面ITO上小球状的无定形物质，能够在温和条件下光催化分解水制氢气，并具有较高的活性和稳定性。在模拟太阳光照下，产氧速率为128μmol/h。 （2）常温常压下，采用原位电解沉积的方法，以硅光伏电池（3jun-a-Si）作为基体，在包含Ag+和K2B4O7+KOH(pH=10)的电解液中原位制备了Ag-Bi析氧催化剂（Ag-OEC），该催化剂是由AgO和Ag2O组成，表面粗糙，呈菜花状，能够的温和条件下光催化分解水，并具有较好的稳定性以及活性。在模拟太阳光照下，产氧速率为35.44μmol/h。 （3）常温常压下，采用原位电解沉积的方法，以硅光伏电池（3jun-a-Si）作为基体，在包含Ag+和NaHCO3的电解质溶液中原位制备了Ag-Ci析氧催化剂（Ag-OEC），该析氧催化剂是由AgO和Ag2O组成，呈现正八面体晶体结构，能够在温和条件下光催化分解水，并具有较好的催化活性和稳定性。
[Abstract]:Solar energy has the advantages of wide distribution, large reserves, clean and pollution-free and so on. It is a kind of renewable energy that can meet the energy demand of human beings well. Hydrogen energy is a kind of secondary energy which is pollution-free, easy to store and has high burning calorific value. Therefore, converting solar energy to hydrogen energy has become a promising and efficient way to use energy. Silicon reserves are very rich, the efficiency of solar energy conversion of silicon photovoltaic cells is increasing, and the production cost is decreasing, which makes solar photovoltaic power play an important role in the future development of energy, environment and human society. Combining photovoltaic cell technology with electrolytic water technology to realize the combination of photovoltaic power generation and photodissociated water hydrogen production, photovoltaic generation of hydrogen, hydrogen storage and hydrogen fuel are used to supplement the needs of dark and cloudy power generation. It provides a new path for the utilization of solar energy. In this paper, Si photovoltaic cell and anodic oxygen evolution catalyst (OEC) were combined to photodissociate water to produce hydrogen in near neutral environment. Co-Bi,Ag-Bi and Ag-Ci anodic oxygen evolution catalysts were formed by in situ electrodeposition of Si photovoltaic materials, which effectively inhibited photocharge recombination of Si photovoltaic semiconductors and achieved near neutral environment. Simulated sunlight irradiates the water to decompose to produce hydrogen. The composition and morphology of the photoanode were analyzed by XRD,SEM,EDS,XPS, and the photocatalytic performance and stability of the photoanode were analyzed by various photochemical methods. The main research contents are as follows: (1) Silicon photovoltaic cell (3jun-a-Si) is used as substrate by in situ electrodeposition. Co-Bi oxygen evolution catalyst (Co-OEC) was prepared in situ in electrolyte solution containing Co2 and K2B4O7 (pH=9.2) at room temperature and atmospheric pressure. The catalyst is a small globular amorphous substance on the surface of 3jun-a-Si substrate ITO. It can decompose water to hydrogen under mild conditions and has high activity and stability. Under simulated solar light, the oxygen production rate was 128 渭 mol/h. (2) at room temperature and atmospheric pressure. Silicon photovoltaic cell (3jun-a-Si) was used as substrate by in situ electrodeposition. In situ, a Ag-Bi oxygen evolution catalyst (Ag-OEC) was prepared in electrolyte containing Ag and K2B4O7 KOH (pH=10). The catalyst is composed of AgO and Ag2O, with rough surface, cauliflower shape and photocatalytic decomposition of water under mild conditions. It also has good stability and activity. Under simulated solar light, oxygen production rate was 35.44 渭 mol/h. (3) at room temperature and atmospheric pressure. Silicon photovoltaic cell (3jun-a-Si) was used as substrate by in situ electrodeposition. Ag-Ci oxygen evolution catalyst (Ag-OEC) was prepared in situ in electrolyte solution containing Ag and NaHCO3. The catalyst is composed of AgO and Ag2O, and has octahedron crystal structure, which can photocatalyze the decomposition of water under mild conditions. It also has good catalytic activity and stability.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN304.12;TQ116.2
本文编号：2321151
[Abstract]:Solar energy has the advantages of wide distribution, large reserves, clean and pollution-free and so on. It is a kind of renewable energy that can meet the energy demand of human beings well. Hydrogen energy is a kind of secondary energy which is pollution-free, easy to store and has high burning calorific value. Therefore, converting solar energy to hydrogen energy has become a promising and efficient way to use energy. Silicon reserves are very rich, the efficiency of solar energy conversion of silicon photovoltaic cells is increasing, and the production cost is decreasing, which makes solar photovoltaic power play an important role in the future development of energy, environment and human society. Combining photovoltaic cell technology with electrolytic water technology to realize the combination of photovoltaic power generation and photodissociated water hydrogen production, photovoltaic generation of hydrogen, hydrogen storage and hydrogen fuel are used to supplement the needs of dark and cloudy power generation. It provides a new path for the utilization of solar energy. In this paper, Si photovoltaic cell and anodic oxygen evolution catalyst (OEC) were combined to photodissociate water to produce hydrogen in near neutral environment. Co-Bi,Ag-Bi and Ag-Ci anodic oxygen evolution catalysts were formed by in situ electrodeposition of Si photovoltaic materials, which effectively inhibited photocharge recombination of Si photovoltaic semiconductors and achieved near neutral environment. Simulated sunlight irradiates the water to decompose to produce hydrogen. The composition and morphology of the photoanode were analyzed by XRD,SEM,EDS,XPS, and the photocatalytic performance and stability of the photoanode were analyzed by various photochemical methods. The main research contents are as follows: (1) Silicon photovoltaic cell (3jun-a-Si) is used as substrate by in situ electrodeposition. Co-Bi oxygen evolution catalyst (Co-OEC) was prepared in situ in electrolyte solution containing Co2 and K2B4O7 (pH=9.2) at room temperature and atmospheric pressure. The catalyst is a small globular amorphous substance on the surface of 3jun-a-Si substrate ITO. It can decompose water to hydrogen under mild conditions and has high activity and stability. Under simulated solar light, the oxygen production rate was 128 渭 mol/h. (2) at room temperature and atmospheric pressure. Silicon photovoltaic cell (3jun-a-Si) was used as substrate by in situ electrodeposition. In situ, a Ag-Bi oxygen evolution catalyst (Ag-OEC) was prepared in electrolyte containing Ag and K2B4O7 KOH (pH=10). The catalyst is composed of AgO and Ag2O, with rough surface, cauliflower shape and photocatalytic decomposition of water under mild conditions. It also has good stability and activity. Under simulated solar light, oxygen production rate was 35.44 渭 mol/h. (3) at room temperature and atmospheric pressure. Silicon photovoltaic cell (3jun-a-Si) was used as substrate by in situ electrodeposition. Ag-Ci oxygen evolution catalyst (Ag-OEC) was prepared in situ in electrolyte solution containing Ag and NaHCO3. The catalyst is composed of AgO and Ag2O, and has octahedron crystal structure, which can photocatalyze the decomposition of water under mild conditions. It also has good catalytic activity and stability.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN304.12;TQ116.2
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