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. 2015 Aug 7;6:7992. doi: 10.1038/ncomms8992

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TOF plots of the CoN_x/C catalyst together with other recently reported molecular and inorganic HER catalysts. Data adapted from: ref. 17 for UHV MoS₂|Au (111); ref. 42 for [Mo₃S₁₃]²⁻|HOPG and [Mo₃S₁₃]²⁻|graphite paper; ref. 21 for double-gyroid MoS₂; ref. 25 for Ni₂P NPs; ref. 27 for CoP NPs; ref. 14 for Ni-bisdiphosphine/CNTs; ref. 39 for H₂-CoCat. Data for CoN_x/C is from the present study.