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         Hydrogen Adsorption on Pristine and Platinum Decorated Graphene Quantum Dot: A First Principle Study
 
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
         Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting
 
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
         Density Functional Theory Study of the Interaction of Carbon Monoxide with Bimetallic Co-Mn Clusters
 
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
         Structures and Electronic Properties of Cu20, Ag20, and Au20 Clusters with Density Functional Method
 
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
          
 
              
         