新型陽極析氧催化劑耦合半導(dǎo)體Si的光解水性能研究
發(fā)布時(shí)間：2018-11-09 17:59
【摘要】：太陽能具有分布廣泛、儲(chǔ)量多、清潔無污染等優(yōu)點(diǎn)，是一種能很好滿足人類能源需求的可再生能源，而氫能是一種無污染、易儲(chǔ)存且燃燒熱值高的二次能源，，因此將太陽能轉(zhuǎn)化為氫能成為了一種很有前景的高效利用能源的一種途徑。 硅儲(chǔ)量十分豐富、硅光伏電池太陽能轉(zhuǎn)換效率不斷提高、生產(chǎn)成本不斷下降，都促使太陽能光伏發(fā)電在能源、環(huán)境和人類社會(huì)未來發(fā)展中占據(jù)重要地位。光伏電池技術(shù)與電解水技術(shù)相結(jié)合，實(shí)現(xiàn)光伏發(fā)電和光解水制氫兩個(gè)綠色能源生產(chǎn)方式的結(jié)合，光伏發(fā)電的同時(shí)制氫、儲(chǔ)氫，氫燃料再用于補(bǔ)充黑夜和陰天的發(fā)電需要，為太陽能的利用提供了新的路徑。 本文將Si光伏電池與陽極析氧催化劑（OEC）相結(jié)合在近中性的環(huán)境下光解水制氫氣。采用原位制備的方法，分別在Si光伏材料上電沉積形成了Co-Bi，Ag-Bi和Ag-Ci陽極析氧催化劑，有效抑制Si光伏半導(dǎo)體光生電荷復(fù)合，實(shí)現(xiàn)了在近中性環(huán)境，模擬太陽光照射下水分解制氫氣。采用XRD，SEM，EDS，XPS等表征手段分析光電陽極的組成及形貌，并使用多種光電化學(xué)測試手段對光電陽極的光催化性能以及穩(wěn)定性進(jìn)行分析。主要研究內(nèi)容如下： （1）采用了原位電解沉積的方法，以硅光伏電池（3jun-a-Si）作為基體，常溫常壓下在包含Co2+和K2B4O7（pH=9.2）的電解質(zhì)溶液中原位制備了Co-Bi析氧催化劑（Co-OEC），該催化劑是一層在3jun-a-Si基體表面ITO上小球狀的無定形物質(zhì)，能夠在溫和條件下光催化分解水制氫氣，并具有較高的活性和穩(wěn)定性。在模擬太陽光照下，產(chǎn)氧速率為128μmol/h。 （2）常溫常壓下，采用原位電解沉積的方法，以硅光伏電池（3jun-a-Si）作為基體，在包含Ag+和K2B4O7+KOH(pH=10)的電解液中原位制備了Ag-Bi析氧催化劑（Ag-OEC），該催化劑是由AgO和Ag2O組成，表面粗糙，呈菜花狀，能夠的溫和條件下光催化分解水，并具有較好的穩(wěn)定性以及活性。在模擬太陽光照下，產(chǎn)氧速率為35.44μmol/h。 （3）常溫常壓下，采用原位電解沉積的方法，以硅光伏電池（3jun-a-Si）作為基體，在包含Ag+和NaHCO3的電解質(zhì)溶液中原位制備了Ag-Ci析氧催化劑（Ag-OEC），該析氧催化劑是由AgO和Ag2O組成，呈現(xiàn)正八面體晶體結(jié)構(gòu)，能夠在溫和條件下光催化分解水，并具有較好的催化活性和穩(wěn)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.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN304.12;TQ116.2
本文編號：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.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN304.12;TQ116.2
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本文編號：2321151
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