摘要
随着可持续发展理念的不断深化,人们对能源的生产利用趋于更环保的方式,尤其是在太阳能与氢能相关领域.电催化硫化氢分解制氢脱硫是一种低能耗的绿色制氢方式,通过电解技术与光伏发电技术结合,把太阳能转化为氢能同时脱除了有毒、有害的硫化氢气体,实现硫化氢气体清洁高值转化.本文在镍泡沫基底上原位构建了纳米片结构Ni_(3)S_(2)电催化材料(Ni_(3)S_(2)/NF),其具备良好的阳极硫氧化和阴极析氢催化活性,电催化硫氧化能够稳定运行200小时以上.设计了光伏-电催化硫化氢直接分解制氢脱硫系统,系统的制氢法拉第效率约为99.9%,太阳能转化为氢能的效率达到6.6%,制氢能耗仅为1.89 kWh Nm^(-3) H_(2),实现绿色低能耗制备氢气同时脱硫.该研究提出了新型绿氢制备方案,实现太阳能资源高效转化,有效促进新能源大力发展.
Hydrogen sulfide(H_(2)S)is a highly corrosive and toxic gas that causes severe harm to human health and the environment,where effective treatment and removal are viewed as a high priority in sustainable development.The conventional Klaus process facilitates H_(2)S recycling in the form of sulfur but does not effectively generate hydrogen as a valuable target resource.In contrast,electrocatalytic H_(2)S decomposition enables a clean conversion of H_(2)S into hydrogen and sulfur.Sustainable development is a global necessity,emphasizing environmentally conscious approaches to energy production and utilization,notably in the fields of solar and hydrogen energy technologies.China is taking the lead in developing clean energy with a large-scale and rapid expansion of new energy power generation(green electricity).Due to the volatility and indirect characteristics of new energy,it is necessary to support energy storage technology or develop green electricity efficient absorption and conversion technology,further advances require novel and effective means of energy storage,enabling viable green electricity generation,absorption and conversion.The use of renewable energy to promote clean H_(2)S decomposition is significant in a holistic approach to the consumption and utilization of renewable energy directed at the treatment of a recalcitrant pollutant.This represents a significant advancement in state-of-the-art energy systems.The theoretical voltage output associated with the direct electrocatalytic decomposition of H_(2)S is 0.35 V.The process is simple to operate with a high hydrogen production efficiency.The photovoltaic electrocatalytic H_(2)S decomposition is recognized as an environmentally friendly and feasible means of hydrogen production with a low associated energy consumption.In this study,we propose a photovoltaic coupling of electrocatalytic H_(2)S decomposition with solar energy resources to promote a clean and high-value conversion and utilization of H_(2)S gas.We have designed a novel catalyst(Ni_(3)S_(2)/NF)based on an in situ formation of a double-layered nanosheet that is grown on a nickel foam substrate.The Ni_(3)S_(2)/NF has delivered superior catalytic activity concerning the oxygen reduction reaction(SOR)and the hydrogen evolution reaction(HER).In terms of efficiency,a potential of 0.56V vs.RHE(reversible hydrogen electrode)and-0.34V vs.RHE is required to drive a current density of 100 mA cm^(−2) for the SOR and HER,respectively,which exhibit stable operation for more than 200 h.A photovoltaic electrocatalytic H_(2)S direct decomposition system has been constructed where the energy consumption associated with H_(2)production is 1.89 kWh/Nm^(3) H_(2),representing low energy demands in a novel clean H_(2)production methodology.The proposed system utilizes self-packaged monocrystalline silicon photovoltaic cell modules to provide the requisite electricity.The design and operation involve an efficient diaphragm electrolysis device,where the Ni_(3)S_(2)/NF electrocatalytic material serves as both the anode and the cathode.A continuous electrolytic hydrogen production is demonstrated,conducted under light irradiation at an intensity of 100 mW cm^(−2).Stable operation is achieved for more than 10 h with an associated hydrogen production of 1 L d^(-1).This level of output represents an average Faraday hydrogen efficiency of 99.9%,with an average solar-to-hydrogen(STH)conversion efficiency of up to 6.6%.The results have demonstrated a viable direct electrolysis of H_(2)S to produce high value hydrogen and sulfur chemical products by photovoltaic power generation.The findings of this research offer a novel approach to effective green hydrogen production that achieves efficient conversion of renewable solar energy resources with the targeted production of a new source of energy.
作者
杜永红
唐春
吴梦南
段超
白宇
黄峥越
周莹
Yonghong Du;Chun Tang;Mengnan Wu;Chao Duan;Yu Bai;Zhengyue Huang;Ying Zhou(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610500,China;Tianfu Yongxing Laboratory,Chengdu 610213,China;Sichuan-Chongqing Joint Key Laboratory of Green Hydrogen Production&Storage and Efficient Utilization,Chengdu 610500,China)
出处
《科学通报》
北大核心
2026年第2期529-541,共13页
Chinese Science Bulletin
基金
国家自然科学基金(52325401)
中国博士后科学基金(2024M750704)
四川省自然科学基金(2023NSFSC0112)
天府永兴实验室科技攻关重大项目(2023KJGG15)资助。
关键词
光伏电催化
硫化氢分解
低能耗制氢
镍基催化材料
photovoltaic electrocatalysis
hydrogen sulfide decomposition
low energy continuous hydrogen production
nickelbased catalyst
