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Jahn-Teller distortion assisted interstitial nitrogen engineering:Enhanced oxygen dehydrogenation activity of N-doped Mn_(x)Co_(3-x)O_(4) hierarchical micro-nano particles

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Nano Research 2021年第8期14卷 2637-2643页

作者： Yangxin Jin Fengfeng Li Peixin Cui Yun Yang Qingping Ke Minh Ngoc Ha Wangcheng Zhan Fei Ruan Chao Wan Zhao Lei Van Noi Nguyen Wei Chen Jun Tang College of Chemistry and Chemical engineering Anhui University of Technology Maanshan 243002China College of Chemistry and Materials engineering Wenzhou University Wenzhou 325035China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China VNU Key Laboratory of Advanced Material for Green Growth VNU University of ScienceVietnam National UniversityHanoi 100000Vietnam Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Rational design of earth-abundant transition metal oxides catalysts is highly desirable for developing sustainable chemical ***,we demonstrate a prospective interstitial nitrogen engineering for fabricating oxygen vacancies(OVs)-rich nitrogen-doped-Mn_(x)Co_(3-x)O_(4)(N-Mn_(x)Co_(3-x)O_(4))oxide catalyst,in which the ratio of OVs concentration of N-Mn_(x)Co_(3-x)O_(4)to Mn species is as high as 1:1,according to the characterizations of X-ray absorption(XAS)and X-ray photoelectron(XPS)*** promising strategy of interstitial nitrogen engineering through lattice distortion caused by the Jahn-Teller effect can significantly increase the amount of interstitial *** resulting catalyst enables an additive-free aerobic dehydrogenation coupling of aromatic amine to afford azo compounds with>99%yield and>99%selectivity at 60☆.We observed the superb catalytic activity is promoted by the enhanced oxygen mobility in OVs,which were created by the interstitial nitrogen in the catalyst *** presence of interstitial nitrogen in transition metal oxides in this study shows how the manipulation of catalyst matrix can increase the OV sites to promote aerobic oxidation reaction.

关键词： transition metal oxides Jahn-Teller effect interstitial nitrogen engineering MnxCo_(3-x)O_(4) dehydrogenation

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