La- and Mn-doped cobalt spinel oxygen evolution catalyst for proton exchange membrane electrolysis

被引:322
|
作者
Chong, Lina [1 ]
Gao, Guoping [2 ]
Wen, Jianguo [3 ]
Li, Haixia [2 ]
Xu, Haiping [1 ]
Green, Zach [4 ]
Sugar, Joshua D. [5 ]
Kropf, A. Jeremy [1 ]
Xu, Wenqian [6 ]
Lin, Xiao-Min [3 ]
Xu, Hui [4 ]
Wang, Lin-Wang [2 ]
Liu, Di-Jia [1 ,7 ]
机构
[1] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA
[2] Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA
[3] Argonne Natl Lab, Ctr Nanoscale Mat, Lemont, IL 60439 USA
[4] Giner Inc, Auburndale, MA 02466 USA
[5] Sandia Natl Labs, Livermore, CA 94550 USA
[6] Argonne Natl Lab, Xray Sci Div, Adv Photon Source, Lemont, IL 60439 USA
[7] Univ Chicago, Pritzker Sch Mol Engn, Chicago, IL 60637 USA
关键词
RAY-ABSORPTION SPECTROSCOPY; EFFICIENT WATER OXIDATION; ELECTROCATALYSTS; STABILITY; HYDROGEN; OXIDES;
D O I
10.1126/science.ade1499
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Discovery of earth-abundant electrocatalysts to replace iridium for the oxygen evolution reaction (OER) in a proton exchange membrane water electrolyzer (PEMWE) represents a critical step in reducing the cost for green hydrogen production. We report a nanofibrous cobalt spinel catalyst codoped with lanthanum (La) and manganese (Mn) prepared from a zeolitic imidazolate framework embedded in electrospun polymer fiber. The catalyst demonstrated a low overpotential of 353 millivolts at 10 milliamperes per square centimeter and a low degradation for OER over 360 hours in acidic electrolyte. A PEMWE containing this catalyst at the anode demonstrated a current density of 2000 milliamperes per square centimeter at 2.47 volts (Nafion 115 membrane) or 4000 milliamperes per square centimeter at 3.00 volts (Nafion 212 membrane) and low degradation in an accelerated stress test.
引用
收藏
页码:609 / 616
页数:8
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