Atomically dispersed molybdenum catalysts for efficient ambient nitrogen fixation. Metal-organic-framework-derived hollow N-doped porous carbon with ultrahigh concentrations of single Zn atoms for efficient carbon dioxide conversion. Exclusive Ni-N 4 sites realize near-unity CO selectivity for electrochemical CO 2 reduction. Regulation of coordination number over single Co sites: Triggering the efficient electroreduction of CO 2. From metal-organic frameworks to single-atom Fe implanted N-doped porous carbons: Efficient oxygen reduction in both alkaline and acidic media.
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Graphene-based non-noble-metal catalysts for oxygen reduction reaction in acid. Catalysis with two-dimensional materials confining single atoms: Concept, design, and applications.
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Herein, we develop a new type of M-X 4 catalyst composed of Fe-N 4 centers and non-coordinated B heteroatoms (FeNC+B) and find the key role of non-coordinated B adjacent to Fe-N 4 centers in tailoring their electron density and final catalytic selectivity. Despite great effort in the construction of specific M-X 4 centers, the possible effect of non-coordinated heteroatoms on the catalytic activity of metal centers has been rarely explored.
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The rational design of highly active and stable atomically dispersed M-X 4 (M = Fe, Co, Ni, etc., X = C, N) -based catalysts holds promises for wide application in almost all realms of catalysis.