层状钙钛矿EuBa0.5Sr0.5Co1.6Fe0.4O5+δ纤维的合成及其电催化水分解性能  

Synthesis and electrocatalytic overall water splitting of layered perovskite EuBa0.5Sr0.5Co1.6Fe0.4O5+δfibers

作　　者：王一茗 王秀 王敬平[3] 夏天[2] WANG Yiming;WANG Xiu;WANG Jingping;XIA Tian(College of Mechanical and Electrical Engineering,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongiang University,Harbin 150080,China;College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学机电工程学院,哈尔滨150001 [2]黑龙江大学化学化工与材料学院教育部功能无机材料化学重点实验室,哈尔滨150080 [3]哈尔滨工程大学材料科学与化学工程学院,哈尔滨150001

出　　处：《黑龙江大学自然科学学报》2020年第4期452-458,共7页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省自然科学基金资助项目(E2016055)。

摘　　要：高活性、可耐受的电化学催化剂对于可持续能源的发展具有非常重要的作用,特别是电化学全解水反应。采用静电纺丝法合成了层状钙钛矿EuBa0.5Sr0.5Co1.6Fe0.4O5+δ纤维(EBSCF0.4-F),并在碱性介质中对其电催化析氧反应(OER)和析氢反应(HER)的性能进行了研究。相比较甘氨酸-硝酸盐路线制备的EuBa0.5Sr0.5Co1.6Fe0.4O5+δ(EBSCF0.4)催化剂,EBSCF0.4-F的OER和HER活性显著提高。当电流密度达到10 mA·cm-2时,催化OER和HER的过电位分别为370和349 mV。以EBSCF0.4-F作为双功能电极所组装的EBSCF0.4-F‖EBSCF0.4-F电解池,在10 mA·cm-2时的分解电压为1.60 V,同时可稳定运行长达22 h。研究结果表明,该材料具有优异的电化学全解水性能,其提升的催化活性可能来源于多孔纤维结构以及较高的比表面积。Highly active and durable electrocatalysts are very important to the development of sustainable energy,especially to electrochemical overall water splitting.Herein layered perovskite EuBa0.5Sr0.5Co1.6Fe0.4O5+δ(EBSCF0.4-F)fibers are synthesized by an electrospinning method,and are evaluated for elec-trocatalytic oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)in alkaline media.Compared with EuBa0.5Sr0.5Co1.6Fe0.4O5+δ(EBSCF0.4)prepared by a glycine-nitrate route,the OER and HER activity of NF-EBSCF0.4 is significantly promoted.EBSCF0.4-F requires the overpotentials of 370 and 349 mV to achieve a current density of 10 mA·cm^-2 for OER and HER,respectively.The EB-SCF0.4-F‖EBSCF0.4-F electrolyzer using EBSCF0.4-F as bifunctional electrodes delivers a cell voltage of 1.60 V,along with stable operation over a period of 22 h.The results indicate that this material has ex-cellent electrochemical performance for overall water splitting.The improved catalytic activity of EB-SCF0.4-F may be attributed to porous fiber structure and high specific surface area.

关 键 词：电催化剂 钙钛矿 水分解反应 多孔纤维结构 

分 类 号：O175.1[理学—数学]