HER Performance of Ru-Ni NAs Considering that Ru is expected to have high activities for HER and OER, the design of Ru-based catalysts for overall water splitting is highly significant from the viewpoint of practical applications ( Pu et al., 2017 , Jiang et al., 2015 ), but the systematic study of Ru-based catalysts is still very limited, especially in a broad pH range.
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