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Hydrogen Production from Water in a Solid Oxide Electrolysis Cell: Effect of Ni Doping on Lanthanum Strontium Ferrite Perovskite Cathodes
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-11-19 , DOI: 10.1021/acs.iecr.9b03731 Dhruba J. Deka 1 , Seval Gunduz 1 , Jaesung Kim 1 , Taylor Fitzgerald 1 , Yingjie Shi 1 , Anne C. Co 2 , Umit S. Ozkan 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-11-19 , DOI: 10.1021/acs.iecr.9b03731 Dhruba J. Deka 1 , Seval Gunduz 1 , Jaesung Kim 1 , Taylor Fitzgerald 1 , Yingjie Shi 1 , Anne C. Co 2 , Umit S. Ozkan 1
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High-temperature water electrolysis in a solid oxide electrolysis cell (SOEC) can be an efficient way of producing hydrogen, especially if it can be coupled with a renewable energy source. In this study, the performance of a nickel-doped, A-site deficient lanthanum strontium ferrite (La0.7Sr0.2FeO3) was investigated as an SOEC cathode. Electrolysis of H2O was carried out using a cathode stream containing 3% H2O/He at 800 °C and at various current densities. It was found that La0.7Sr0.2FeO3 has a lower Faradaic efficiency for hydrogen production than the Ni-doped cathode for which the efficiency reaches 100%. XRD shows that the undoped sample forms a nonconducting La2O3 secondary phase which affects the electrochemical performance negatively. On the nickel-doped sample, however, a B-site metal phase and a Ruddlesden–Popper phase with mixed electronic and ionic conductivity are formed, which enhances the electrochemical performance of the cathode.
中文翻译：
固体氧化物电解池中水的氢生产：镍掺杂对镧锶铁氧体钙钛矿阴极的影响
固态氧化物电解池（SOEC）中的高温水电解可以是一种高效的制氢方法，尤其是如果它可以与可再生能源耦合的话。在这项研究中，作为SOEC阴极，研究了镍掺杂，A位置缺陷的镧锶铁氧体（La 0.7 Sr 0.2 FeO 3）的性能。使用包含3％H 2 O / He的阴极物流在800°C和不同的电流密度下进行H 2 O的电解。发现La 0.7 Sr 0.2 FeO 3具有比氢掺杂镍的阴极低的法拉第效率，氢掺杂效率达到100％。XRD显示未掺杂的样品形成不导电的La 2 O 3次级相，该相对电化学性能产生负面影响。但是，在掺杂镍的样品上，会形成B位金属相和Ruddlesden-Popper相，具有混合的电子和离子导电性，从而增强了阴极的电化学性能。
更新日期：2019-11-19
中文翻译：
固体氧化物电解池中水的氢生产：镍掺杂对镧锶铁氧体钙钛矿阴极的影响
固态氧化物电解池（SOEC）中的高温水电解可以是一种高效的制氢方法，尤其是如果它可以与可再生能源耦合的话。在这项研究中，作为SOEC阴极，研究了镍掺杂，A位置缺陷的镧锶铁氧体（La 0.7 Sr 0.2 FeO 3）的性能。使用包含3％H 2 O / He的阴极物流在800°C和不同的电流密度下进行H 2 O的电解。发现La 0.7 Sr 0.2 FeO 3具有比氢掺杂镍的阴极低的法拉第效率，氢掺杂效率达到100％。XRD显示未掺杂的样品形成不导电的La 2 O 3次级相，该相对电化学性能产生负面影响。但是，在掺杂镍的样品上，会形成B位金属相和Ruddlesden-Popper相，具有混合的电子和离子导电性，从而增强了阴极的电化学性能。
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