Fig. 1: Physical structure of the atomically dispersed transition-metal catalysts. | Nature Communications

Fig. 1: Physical structure of the atomically dispersed transition-metal catalysts.

From: Elucidating electrochemical nitrate and nitrite reduction over atomically-dispersed transition metal sites

Fig. 1

a Selection of 3d, 4d, 5d and f metals synthesized via the sacrificial support method. b Schematic of the nitrogen coordinated metal active site (M-N4) on a prototype carbon matrix, illustrating in-plane and out-of-plane configurations. Where the black, blue, brown/purple balls represent carbon, nitrogen and metal atoms, respectively. c–e Representative atomic resolution HAADF STEM images for the Fe-N-C, Rh-N-C and La-N-C catalysts. High contrast points indicate atomically dispersed metal sites. Corresponding EDS mapping of the M-N-C is given below.

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