Facile Synthesis of a Nickel Sulfide (NiS) Hierarchical Flower for the Electrochemical Oxidation of H2O2and the Methanol Oxidation Reaction (MOR)

National Science Foundation of China (No. 21405005, 21501006) ; Joint Fund for Fostering Talents of National Natural Science Foundation of China and Henan Province (No. U1404208) ; Program for Science and Technology Innovation Talents at the University of Henan Province (17HASTIT001) ; Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry.