等离子喷涂致密La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)透氧膜的氧传输行为
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摘要
采用超音速等离子喷涂(SAPS)和等离子物理气相沉积方法(PS-PVD)制备了结构致密的钙钛矿型(ABO_3)La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)(LSCF)透氧膜。利用氧程序升温脱附(O2-TPD)、XPS等手段,比较了2种膜在200～900℃间氧物种在表面及体相中的传递变化情况。O2-TPD结果显示:SAPS膜的物理吸附氧脱附量、化学吸附氧脱附量和晶格氧脱附量分别超过PS-PVD膜的2倍、3倍和6倍;而XPS结果显示:SAPS膜表面吸附氧与晶格氧O1s峰面积比也高于PS-PVD膜。以上结果表明SAPS膜对氧具有更好的吸附及解离能力、更多的本征氧空位及更高的空位生成能力。
The gas-tight perovskite La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)(LSCF) oxygen transport membranes were prepared by supersonic air-gas plasma spraying(SAPS) and low pressure plasma spraying-physical vapor deposition(PS-PVD). The surface exchange and bulk diffusion of the oxygen species of the two membranes were compared by O_2-TPD and XPS. The O_2-TPD results show that the desorptions of the physical, chemical adsorbed oxygen and the lattic oxygen of the SAPS membrane were 2, 3 and 6 times respectively more than th ose of the PS-PVD membrane. The XPS results show a higher proportion of adsorbed oxygen of the SAPS membrane than that of the PS-PVD membrane. All the above results demonstrate that the SAPS membrane has better adsorption and dissoc iation abilities on oxygen, and also possesses more intrinsic oxygen vacancies and higher capacity of vacancy formation.
The gas-tight perovskite La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)(LSCF) oxygen transport membranes were prepared by supersonic air-gas plasma spraying(SAPS) and low pressure plasma spraying-physical vapor deposition(PS-PVD). The surface exchange and bulk diffusion of the oxygen species of the two membranes were compared by O_2-TPD and XPS. The O_2-TPD results show that the desorptions of the physical, chemical adsorbed oxygen and the lattic oxygen of the SAPS membrane were 2, 3 and 6 times respectively more than th ose of the PS-PVD membrane. The XPS results show a higher proportion of adsorbed oxygen of the SAPS membrane than that of the PS-PVD membrane. All the above results demonstrate that the SAPS membrane has better adsorption and dissoc iation abilities on oxygen, and also possesses more intrinsic oxygen vacancies and higher capacity of vacancy formation.
引文
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[3]Bouwmeester H J M.Catal Today[J],2003,82(1-4):141
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[5]Den Exter M,Vente J F,Jansen D et al.Energy Procedia[],2009,1(1):455
[6]Czyperek M,Zapp P,Bouwmeester H J M et al.J Membr Sci[J],2010,359(1-2):149
[7]Wei Y Y,Yang W S,Caro J et al.Chem Eng J[J],2013,220:185
[8]Zhu Xuefeng(朱雪峰),Yang Weishen(杨维慎).Chinese Journal of Catalysis(催化学报)[J],2009,30(8):801
[9]Büchler O,Serra J M,Meulenberg W A et al.Solid State Ionics[J],2007,178(1-2):91
[10]Middleton H,Diethelm S,Ihringer R et al.J Eur Ceram Soc[J],2004,24(6):1083
[11]McCool B,Xomeritakis G,Lin Y S et al.J Membr Sci[J],1999,161(1-2):67
[12]Van der Haar L M,Verweij H.J Membr Sci[J],2000,180(1):147
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[14]Betz M,Schulze-Küppers F,Baumann S et al.Adv Sci Tech[J],2010,72:93
[15]ISBN 978-3-89336-765-8[S],2011
[16]Xing Y,Baumann S,Uhlenbruck S et al.J Eur Ceram Soc[J],2013,33(2):287
[17]Xing Y,Baumann S,Sebold D et al.J Am Ceram Soc[J],2011,94(3):861
[18]Azzurri F,Capannelli G,Comite A et al.Procedia Engineering[J],2012,44:1243
[19]Hospach A,Mauer G,Va?en R et al.J Therm Spray Tech[J],2012,21(3-4):435
[20]Zotov N,Hospach A,Mauer G et al.J Therm Spray Tech[J],2012,21(3-4):441
[21]Jarligo M O,Mauer G,Bram M et al.J Therm Spray Tech[J],2014,23(1-2):213
[22]Pinacci P,Louradour E,Wimbert L et al.Energy Procedia[J],2013,37:1030
[23]Zotov N,Baumann S,Meulenberg W A et al.J Membr Sci[J],2013,442:119
[24]Marcano D,Mauer G,Sohn Y J et al.J Membr Sci[J],2016,503:1
[25]Marcano D,Mauer G,Sohn Y J et al.J Therm Spray Tech[J],2016,25(4):631
[26]Ou Xian(欧献),Deng Changguang(邓畅光),Wang Richu(王日初)et al.Transactions of Materials and Heat Treatment(材料热处理学报)[J],2014,35(S2):180
[27]Mao Jie(毛杰),Deng Chunming(邓春明),Kuang Ziqi(邝子奇)et al.Transactions of Materials and Heat Treatment(材料热处理学报)[J],2015,36(1):143
[28]Niu S P,Zhou K S,Xu L P et al.Surf Coat Tech[J],2016,307:963
[29]Jin Wanqin(金万勤),Xu Nanping(徐南平).Mixed Oxygen Ion and Electron Conducting Membrane:Design,Fabrication and Application(混合导体氧渗透膜:设计、制备与应用)[M].Beijing:Science Press,2013:71
[30]Yi Jianxin(易建新).Thesis for Doctorate(博士论文)[D].2006
[31]Zhu Yongfa(朱永法),Zong Ruilong(宗瑞隆),Yao Wenqing(姚文清)et al.Analytical Chemistry of Materials(材料分析化学)[M].Beijing:Chemical Industry Press,2009:297
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