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Great enthusiasms in single-atom catalysts (SACs) for the oxygen reduction reaction (ORR) are aroused by the discovery of M-Nx as a promising ORR catalysis center. However, the performance of SACs lags far behind that of state-of-the-art Pt due to the unsatisfactory adsorption-desorption behaviors of the reported catalytic centers. To address this issue, ra-tional manipulation of the active site configuration towards a well-managed energy level and geometric structure is ur-gently desired, yet still remains a challenge. Herein, we report a novel strategy to accomplish this task through the con-struction of an Fe-Co dual-atom centered site. A spontaneously absorbed electron-withdrawing OH ligand was proposed to act proactively as an energy level modifier to empower easy intermediate desorption, while the triangular Fe-Co-OH coordination facilitates O-O bond scission. Benefiting from these attributes, the as-constructed FeCoN5-OH site enables an ORR onset potential and half-wave potential of up to 1.02 and 0.86 V (vs. RHE) respectively, with an intrinsic activity over 20 times higher than the single-atom FeN4 site. Our finding not only opens up a novel strategy to tailor the electronic structure of an atomic site towards boosted activity, but also provides new insights into the fundamental understanding of diatomic sites for ORR electrocatalysis.
This article was published in the following journal.
Name: Journal of the American Chemical Society
While stair climbing could contribute to daily physical activity goals, and there is potential for broad population reach, most stair climbing interventions are single-component and have limited effec...
This article presents the results of the yearly medical examination performed on all our national climbing athletes in 2016 and 2017.
Accurate working length (WL) determination is necessary in achieving optimal healing by non-surgical root canal therapy in teeth with inflammatory apical root resorption. Electronic apex locators (EAL...
NikR is a nickel-responsive metalloregulator protein that controls the level of Ni2+ ions in living cells. Previous studies have shown that NikR can bind a series of first row transition metal ions, b...
The selective functionalization of one C-H bond over others in nearly identical steric and electronic environments can facilitate the construction of complex molecules. We report site-selective functi...
Accurate length determination of root canal is essential in root canal therapy. Radiography has been the conventional method for this measurement but recently several in-vitro studies have...
The purpose of this study is to compare the accuracy of different apex locators. Before root canal therapy, dentists use a device called an electronic apex locator (EAL) to measure the roo...
Stair climbing up and down is an essential part of everyday's mobility. Physiotherapy is focused on muscle strengthening, real floor walking and stairs climbing tasks, but these methods do...
This randomized controlled trial will assess the interpretability of the rank-heat plot for presenting the results of network meta-analysis in comparison to SUCRA (surface under the cumula...
This pilot study seeks to demonstrate feasibility to conduct data collection and illustrate potential for effect of fractionalized bouts of stair climbing on glucose control in adults at r...
Funding resources and procedures for capital improvement or the construction of facilities.
Architecture, exterior and interior design, and construction of facilities other than hospitals, e.g., dental schools, medical schools, ambulatory care clinics, and specified units of health care facilities. The concept also includes architecture, design, and construction of specialized contained, controlled, or closed research environments including those of space labs and stations.
The architecture, functional design, and construction of hospitals.
The bonelike rigid connective tissue covering the root of a tooth from the cementoenamel junction to the apex and lining the apex of the root canal, also assisting in tooth support by serving as attachment structures for the periodontal ligament. (Jablonski, Dictionary of Dentistry, 1992)
A class of parasitic FUNGI. Characteristics include spores that are spherical, oval, or tubular in shape and sporoplasm which is uninuclear or binuclear.
Standard antiretroviral therapy (ART) consists of the combination of at least three antiretroviral (ARV) drugs to maximally suppress the HIV virus and stop the progression of HIV disease. Huge reductions have been seen in rates of death and suffering whe...