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Breaking the linear correlations for enhanced electrochemical nitrogen reduction by carbon-encapsulated mixed-valence Fe_(7)(PO_(4))_(6)

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Journal of Energy Chemistry 2022年第8期31卷 182-187,I0006页

作者： Lehui Ma Fanfan Xu Linlin Zhang Zhongfen Nie Kai Xia Mingxia Guo Mingzhu Li Xin Ding College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina

Electrochemical nitrogen reduction(NRR)is deemed as a consummate answer for the traditional Haber–Bosch *** the linear correlations between adsorption and transition-state energies of intermediates is vital to improve the kinetics of ammonia synthesis and obtain a less energy-intensive ***,carbon-encapsulated mixed-valence Fe_(7)(PO_(4))_(6) was prepared and applied as an electrocatalyst for high-efficiency NRR.A dramatic faradaic efficiency(FE)of 36.93%and an NH_(3) production rate of 13.1μg h^(-1) mg_(cat)^(-1) were obtained at-0.3 V versus RHE,superior to nearly all Fe-based *** and DFT calculations revealed that the superior performance was ascribed to the synergistic effect of mixed-valence iron pair,which braked the linear correlations to improve the kinetics of ammonia from collaborative hydrogenation and*NH_(3) *** work proves the feasibility of mixedvalence catalysts for nitrogen reduction and thus opening a new avenue towards artificial nitrogenfixation catalysts.

关键词： N2 reduction reaction(NRR) Mixed-valence linear correlations Nitrogen fixation N_(2)activation

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Structural-visual functional relationships detected by optical coherence tomography in varying age-cohorts' patients with optic neuritis

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International Journal of Ophthalmology(English edition) 2022年第6期15卷 967-974页

作者： Wei Shi Hong-Tao Zhang Hua-Xin Zuo Si-Yuan Li Pan-Pan Zheng Quan-Gang Xu Si-Yu Cai Shi-Hui Wei Li Li Chun—Xia Peng Department of Ophthalmology Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijing 100045China Department of Ophthalmology the Third Medical Center of Chinese PLA General HospitalBeijing 100039China Clinical Epidemiology and Evidence-based Medicine Beijing Children's HospitalCapital Medical UniversityNational Center for Children’s HealthBeijing 100045China Department of Ophthalmology the First Medical Center of Chinese PLA General HospitalBeijing 100853China

AIM: To assess the relationships of final best-corrected visual acuity(BCVA) and the optic nerve structural loss in varying age-cohorts of optic neuritis(ON) ***: This is a retrospective, cross-sectional *** 130 ON subjects(200 eyes) without ON onset within 6mo were included, who underwent BCVA assessment,peripapillary retinal nerve fibre layer(pRNFL) and macular segmented layers evaluation by optical coherence tomography(OCT).RESULTS: For the 0-18y cohort, the final BCVA(logMAR)was significantly better and less frequent recurrences than adult cohorts(P=0.000). The final BCVA(logMAR) in all age-cohorts of the ON patients had negative and linear correlations to the pRNFL thicknesses and macular retinal ganglion cell layer(mRGCL) volumes, when the pRNFL thicknesses were reduced to the thresholds of 57.2-67.5 μm or 0.691-0.737 mm;in mRGCL volumes, respectively, with the strongest interdependence in the 19-40y cohort. The ON patients from varying age cohorts would be threatened by blindness when their pRNFL thicknesses dropped 36.7-48.3 μm or the mRGCL volumes dropped to 0.495-0.613 mm;.CONCLUSION: The paediatric ON has best prognosis and young adult ON exhibits perfectly linear correlations of final vision and structural loss. The pRNFL and the mRGCL could be potential structural markers to predict the vision prognosis for varying-age ON patients.

关键词： optic neuritis age-cohort final visual acuity structural impairment linear correlations

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