自支撑非晶Ce-FeHPi/NF电极的电解海水性能研究  

Seawater Electrolysis Performance of Self-supported Amorphous Ce-Fe HPi/NF Electrode

作　　者：肖文艳 付艳[1,2] 杨书镔 朱洁 程照阳 温小煦 唐嘉繁 于亮 张骞[2] XIAO Wenyan;FU Yan;YANG Shubin;ZHU Jie;CHENG Zhaoyang;WEN Xiaoxu;TANG Jiafan;YU Liang;ZHANG Qian(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;The Center of New Energy Materials and Technology,School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]西南石油大学新能源与材料学院新能源材料及技术研究中心,成都610500

出　　处：《无机材料学报》2024年第12期1348-1356,I0003-I0006,共13页Journal of Inorganic Materials

基　　金：四川省重大科技专项揭榜挂帅项目(2022ZDZX0042)。

摘　　要：为了解决现有的能源危机,实现持续的海水电解,需要设计高效的电催化剂来应对阳极析氧反应缓慢与氯离子(Cl~–)腐蚀的问题。本研究在泡沫镍(NF)骨架上采用一步式水热法制备了一种具有独特纳米结构的改性Ce-FeHPi/NF电极。实验结果表明,Ce掺杂调节了FeHPi/NF的表面形貌,形成了非晶型纳米球,这不仅使催化层生长为致密紧实的纳米结构,而且大幅提高了电极的活性表面积,从而明显提高了电催化活性。此外,磷酸基可有效排斥电极表面的Cl~–,增强其耐腐蚀性,使其在海水中长期稳定运行。10%Ce-FeHPi/NF电极在碱性模拟海水(1 mol·L^(–1)KOH+0.5 mol·L^(–1)NaCl)电解液中,仅需要较低的过电位(296 mV)即可达到100 mA·cm^(–2)的电流密度。在1 mol·L^(–1)KOH+1 mol·L^(–1)NaCl电解液中,10%Ce-FeHPi/NF电极在恒电位1.774 V(vs.RHE)下实现了超过130 h的稳定运行。本研究所制备的改性纳米结构材料有效提高了电极的析氧活性,为海水电解阳极催化材料的发展提供了一条新的途径。To solve the existing energy crisis and achieve continuous seawater electrolysis,it is necessary to design efficient electrocatalysts to deal with the problems of slow anodic oxygen evolution and chloride ion(Cl–)corrosion.In this study,a unique nanostructural modified Ce-FeHPi/NF electrode was prepared by a one-step hydrothermal method on a nickel foam(NF)skeleton.The experimental results show that Ce doping regulates the surface morphology of FeHPi/NF,forming amorphous nanospheres,which not only enables the catalytic layer to grow into a compact nanostructure,but also greatly increases the active surface area of the electrode,significantly improving the electrocatalytic activity.In addition,the presence of phosphoric acid group can effectively repel Cl~–on surface of the electrode,which enhances its corrosion resistance,and stabilizes it in seawater for a long time.The 10%Ce-FeHPi/NF electrode in alkaline simulated seawater(1 mol·L^(–1)KOH+0.5 mol·L^(–1)NaCl)electrolyte requires only a low overpotential of 296 mV to reach a current density of 100 mA·cm^(–2).In 1 mol·L^(–1)KOH+1 mol·L^(–1)NaCl,the 10%Ce-FeHPi/NF electrode runs stably for more than 130 h at a constant potential of 1.774 V(vs.RHE).Therefore,the modified nanostructured material prepared in this study can effectively improve the oxygen evolution activity of electrodes,and provide a new way for the development of seawater electrolytic anode catalytic materials.

关 键 词：海水电解 阳极材料 磷酸化合物 一步式水热 

分 类 号：TQ151[化学工程—电化学工业]