Key Laboratory of Material Physics of Ministry of Education;
Zhengzhou University;
Zhengzhou 450052;
China;
Department of Mathematical and Physical Sciences;
Henan Institute of Engineering;
Zhengzhou 451191;
China;
Department of Chemistry;
Zhengzhou University;
Zhengzhou 450052;
China Department of Mathematical and Physical Sciences;
Henan Institute of Engineering;
Zhengzhou 451191;
China Department of Mathematical and Physical Sciences;
Henan Institute of Engineering;
Zhengzhou 451191;
China Key Laboratory of Material Physics of Ministry of Education;
Zhengzhou University;
Zhengzhou 450052;
China Department of Chemistry;
Zhengzhou University;
Zhengzhou 450052;
China;
YBaCo4O7+δ; oxygen; adsorption/desorption; adsorbent; nitrogen; purification; rare; earths;