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  _____    __   __    _____     ______   ______   
 |__  //   \ \\/ //  / ____||  /_   _// |      \\ 
   / //     \ ` //  / //---`'   -| ||-  |  --  // 
  / //__     | ||   \ \\___     _| ||_  |  --  \\ 
 /_____||    |_||    \_____||  /_____// |______// 
 `-----`     `-`'     `----`   `-----`  `------`

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Text this: Theoretical guidance and experimental confirmation on catalytic tendency of M-CeO<inf>2</inf>(M = Zr, Mn, Ru Or Cu) for NH<inf>3</inf>-SCR of NO