摘要
氢气是一种高能量密度的清洁型能源,具有高效率、低成本、产物无污染和来源丰富等优点,利用太阳能光伏、风力、水力等可再生清洁能源电催化分解水制氢是最具潜力的绿色制氢方式之一。其中电催化材料对能源转换效率起至关重要的作用,电催化优异的Pt、Ir等贵金属基材料价格高昂、储量稀缺,无法在工业上大规模应用。因此,非贵金属类电催化材料成为当前电催化领域研究的热点。而影响电解水效率的主要因素是动力学缓慢的析氧半反应(OER),本论文合成了一种新型有机双联配体,并利用该配体与钴、铁等配位,水热合成了一系列钴、铁单金属MOFs(Co_(x)MOFs、Fe_(x)MOFs)和钴铁双金属MOFs(Co_(x)Fe_(y)MOFs)材料,表征其微观结构和形貌,并通过多种电化学手段测试其电催化分解水析氧性能,结果表明单金属MOF中有机配体与金属按物质的量比3∶1制备的MOF的析氧性能最好,而双金属MOF中铁和钴的相互作用提高了其电催化动力学、减小了电化学阻抗,Co6FeMOF表现出最优的电催化析氧性能,且所有催化材料都具有较好的稳定性。
Hydrogen is clean energy with high energy density.It has the advantages of high efficiency,low cost,pollution-free products and rich sources.Electrocatalytic decomposition of water for hydrogen evolution is one of the most potential green hydrogen production methods,especially when renewable clean energy such as solar photovoltaic,wind power and water power are used to produce electricity.In which,electrocatalytic materials play a crucial role in energy conversion efficiency.The price of precious metal based materials such as Pt and Ir are very high and their reserves are scarce,so they cannot be widely used in industry.Therefore,the research of non-noble metal materials has become a hot spot in the field of electrocatalysis.The main factor affecting the efficiency of electrolytic water is the slow oxygen evolution reaction(OER).In this manuscript,a new organic double ligand is synthesized,and a series of cobalt or iron monometallic MOFs(Co_(x)MOFs,Fe_(x)MOFs)and cobalt iron bimetallic MOFs(Co_(x)Fe_(y)MOFs),The results show that the MOF with 3∶1 ratio of organic ligand to metal exbihited the best OER performance in the single metal MOF,while the interaction of iron and cobalt in the bimetallic MOF improves its electrocatalytic kinetics and reduces its electrochemical impedance,thus Co6FeMOF shows the best electrocatalytic OER performance in bimetallic MOF.All the prepared catalytic materials show very good stability.
作者
高卓
杨婷婷
田忠贞
Gao Zhuo;Yang Tingting;Tian Zhongzhen(College of Chemistry and Chemical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《山东化工》
CAS
2023年第7期1-4,共4页
Shandong Chemical Industry
基金
国家自然科学基金(32060623)
内蒙古自治区科技计划(2021GG0041,2021GG0044)。
