Tuning exsolution of nanoparticles in defect engineered layered perovskite oxides for efficient CO_(2) electrolysis

Solid oxide electrolysis cell(SOEC) could be a potential technology to afford chemical storage of renewable electricity by converting water and carbon dioxide.In this work,we present the Ni-doped layered perovskite oxides,(La_(4)Sr_(n-4))_(0.9)Ti_(0.9n)Ni_(0.1n)O_(3n+2) with n=5,8,and 12(LSTNn) for application as catalysts of CO_(2) electrolysis with the exsolution of Ni nanoparticles through a simple in-situ growth method.It is found that the density,size,and distribution of exsolved Ni nanoparticles are determined by the number of n in LSTNn due to the different stack structures of TiO_6 octahedra along the c axis.The Ni doping in LSTNn significantly improved the electrochemical activity by increasing oxygen vacancies,and the Ni metallic nanoparticles afford much more active sites.The results show that LSTNn cathodes can successfully be manipulated the activity by controlling both the n number and Ni exsolution.Among these LSTNn(n=5,8,and 12),LSTN8 renders a higher activity for electrolysis of CO_(2) with a current density of 1.50A cm^(-2)@2.0 V at 800℃ It is clear from these results that the number of n in(La_(4)Sr_(n-4))_(0.9)Ti_(0.9n)Ni_(0.1n)O_(3n+2)with Ni-doping is a key factor in controlling the electrochemical performance and catalytic activity in SOEC.

The Association between Vitamin D and Hashimoto Thyroiditis:An Upto-date Systematic Review and Meta-analysis

The objective of the surrent study was to summarize the up-to-date studies to investigate the relationship between vitamin D and Hashimoto thyroiditis(HT).An online search of English and Chinese databases was performed.The studies concerned the investigation of the relationship between vitamin D and HT including meta-analysis,meanwhile the heterogeneities were revealed by subgroup analysis.Fourty six elated studies containing 15,336 participants(HT:6,138 versus control:9,198)were included.HT patients had lower levels of 25(OH)D_(3)(standardised mean difference,−1.09;95%CI:[−1.42,−0.75];P<0.01),and were more likely to be deficient in 25(OH)D_(3)(OR,2.77;95%CI,[1.88,3.91];P<0.05).Obvious heterogeneities in the results of meta-analysis were down to the difference of detection methods and criteria of vitamin D insufficiency among studies.Vitamin D deficiency was colncluded to have a significant relation with HT.

Application of Social Support System in the Rehabilitation of Vagrants and Beggars with Mental Illness

Objective:Analyze the specific role of social support in vagrants and beggars with mental illness.Methods:80 patients with vagrant psychosis admitted into our hospital from April 2020 to April 2021 were randomly selected.The patients were treated for more than 6 months.The patients were randomly divided into two groups by drawing lots,with 40 cases in each group.The control group received routine nursing,and the observation group received routine nursing along with social support.The objective support,subjective support,and the utilization of support,which were combined into total social support of the two groups were compared after different nursing interventions.Results:After different nursing interventions,through the comparison of social support scale,the scores of objective support,subjective support,and utilization of support,and the total social support in the observation group were higher than the control group,and the differences were statistically significant(P<0.05).Conclusion:The application of social support system and while providing routine nursing among vagrants and beggars with psychosis can effectively improve their mental status,make them feel more valued and supported,and help improve their mental health and quality of life.

Singular soliton solution and bifurcation analysis of Klein-Gordon equation with power law nonlinearity

In this paper, the Klein-Gordon equation （KGE） with power law nonlinearity will be considered. The bifurcation analysis as well as the ansatz method of integration will be applied to extract soliton and other wave solutions. In particular, the second approach to integration will lead to a singular soliton solution. However, the bifurcation analysis will reveal several other solutions that are of prime importance in relativistic quantum mechanics where this equation appears.