基于多金属掺杂的氧化铈阳极的甲烷协助电解水制氢研究  

Methane Assisted Hydrogen Production by Water Electrolysis Using Polymetallic Doped Cerium Oxide Anodes

作　　者：冯华 章寒冰 叶吉超 胡鑫威 徐永海 FENG Hua;ZHANG Han-bing;YE Ji-chao;HU Xin-wei;XU Yong-hai(Lishui Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Lishui 323000,China)

机构地区：[1]国网浙江省电力有限公司丽水供电公司,浙江丽水323000

出　　处：《化学试剂》2023年第11期65-70,共6页Chemical Reagents

基　　金：浙江省电力有限公司2022年科技项目(5211LS220001)。

摘　　要：采用甲烷协助电解水制氢可以显著降低固体氧化物电解池制氢电耗。从甲烷氧化活性和氧离子传导性的角度出发,采用一锅水解法制备了氧化锆和氧化钐掺杂的氧化铈阳极材料(Sm_(0.1)Zr_(0.1)Ce_(0.8)O_(2-x)),并同时一锅负载Ni、Co和Fe活性金属。结果表明钐和锆的掺杂显著提高氧化铈的氧化活性,而Ni金属负载可以使甲烷完全转化温度降低75℃,良好的甲烷氧化活性可以实现甲烷气氛下更低的电解电压。不同负载金属的结果表明,具有良好甲烷氧化活性的Ni、Co负载Sm_(0.1)Zr_(0.1)Ce_(0.8)O_(2-x)在不同电流密度下均体现出甲烷协助电解水性能,低的欧姆阻抗和高频极化阻抗使Co负载的阳极具有更高的性能,电解电压低至0.37 V@250 mA/cm^(2);缺乏甲烷氧化活性的Fe负载Sm_(0.1)Zr_(0.1)Ce_(0.8)O_(2-x)具有良好的析氧性能,但缺乏甲烷辅助性能。具有甲烷氧化活性性能是实现甲烷协助电解水制氢的关键。The use of methane to assist electrolysis of water to produce hydrogen can significantly reduce the electricity consumption for hydrogen production in solid oxide electrolytic cells.Herein,zirconia and samarium oxide-doped cerium oxide anode materials(Sm_(0.1)Zr_(0.1)Ce_(0.8)O_(2-x))were prepared by one-pot hydrolysis from the perspectives of methane oxidation activity and oxygen ion conductivity.Simultaneously,nickel(Ni),cobalt(Co),and iron(Fe)catalytic metals were loaded in one pot.The results showed that the doping of samarium and zirconium greatly increases the oxidation activity of cerium oxide,while Ni metal loading can reduce the complete oxidation temperature by 75℃.And high methane oxidation activity can achieve lower electrolytic voltage in methane atmosphere.The results showed that Ni and Co loaded Sm_(0.1)Zr_(0.1)Ce_(0.8)O_(2-x) with good methane oxidation activity show methane-assisted water electrolysis performance at different current densities.The low ohmic impedance and high-frequency polarization impedance of the Co-loaded anode contribute to its superior performance,achieving electrolysis voltage as low as of 0.37 V@250 mA/cm^(2).Fe-loaded Sm_(0.1)Zr_(0.1)Ce_(0.8)O_(2-x) with poorer methane oxidation activity exhibits high oxygen evolution performance,but lacks methane assisment for water electrolysis.Methane oxidation activity is the key to achieving methane-assisted electrolysis of water to hydrogen production.

关 键 词：氧化铈 金属掺杂 甲烷氧化 电解水制氢 固体氧化物电解池 

分 类 号：TK91[动力工程及工程热物理]