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             ___       _____   _    _   __    __  
    ___     / _ \\    / ___// | || | || \ \\ / // 
   /   ||  | / \ ||   \___ \\ | || | ||  \ \/ //  
  | [] ||  | \_/ ||   /    // | \\_/ ||   \  //   
   \__ ||   \___//   /____//   \____//     \//    
    -|_||   `---`   `-----`     `---`       `     
     `-`

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Text this: Rationally designed hierarchical N-doped carbon@NiCo2O4 double-shelled nanoboxes for enhanced visible light CO2 reduction