2022
DOI: 10.1016/j.apcatb.2021.120937
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Efficient NiFe-based oxygen evolution electrocatalysts and origin of their distinct activity

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Cited by 93 publications
(56 citation statements)
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“…Therefore, it is necessary to discuss the surface-active phase of electrocatalysts. As shown in Figure a–d, after OER with or without an AC magnetic field, the same phase appeared, while a slight peak shift was found in Co 2p 3/2 of all electrocatalysts, indicating the formation of a limited oxyhydroxide layer on the electrocatalyst surface. Moreover, TEM images of the electrocatalyst Co after OER (Figure e–g) supported the conclusion.…”
Section: Resultssupporting
confidence: 63%
“…Therefore, it is necessary to discuss the surface-active phase of electrocatalysts. As shown in Figure a–d, after OER with or without an AC magnetic field, the same phase appeared, while a slight peak shift was found in Co 2p 3/2 of all electrocatalysts, indicating the formation of a limited oxyhydroxide layer on the electrocatalyst surface. Moreover, TEM images of the electrocatalyst Co after OER (Figure e–g) supported the conclusion.…”
Section: Resultssupporting
confidence: 63%
“…First, multi-component electrocatalysts comprising more than one metal (e.g., Fe, Co, and Ni) and/or non-metal (e.g., S and P) species have been demonstrated to show better performance than monometallic phosphide and sulfide, [13b] because the coexistence of multiple elements allows for the exposure of more catalytically active sites, and more importantly the tuning of catalyst's electronic structure that enables to enhance the intrinsic catalytic activity. [14] To this end, bimetallic phosphide/sulfide (Ni x Fe 1-x P/S, [15] (Co 1-x Fe x ) 2 P, [16] NiCoP, [17] and Fe-NiS 2 [18] ), metal phosphosulfide (CoPS, [19] P-NiS 2 , [20] CoS|P/CNT, [21] and FePS 3 [22] ), and multi-metal phosphosulfide (Fe 0.2 Ni 0.8 -P 0.5 S 0.5 , [23] Ni 1-x Fe x PS, [24] P-CoNi 2 S 4 , [12a] and FeCoNiP x S y [25] ), were reported already and exhibited improved electrocatalytic performance thanks to the synergetic interplay of different elements. Second, structure engineering turns out to be an effective strategy for achieving high catalytic performance.…”
Section: Research Articlementioning
confidence: 99%
“…The alkaline OER process consists of several basic steps about the first adsorption of OH − (OH*), then the formation of O*, OOH*, and O–O* intermediates, and the final desorption of O 2 . 13 We determined the adsorption strength of *OH intermediate by adding 1.0 M CH 3 OH into the electrolyte under the CV methods. As shown in Fig.…”
Section: Resultsmentioning
confidence: 99%