| 1 | Combined “Gateway” and “Spillover” effects originated from a CeNi_(5) alloy catalyst for hydrogen storage of MgH_(2)显示文摘Efficient catalysts enable MgH2 with superior hydrogen storage performance.Herein,we successfully synthesized a catalyst composed of Ce and Ni (i.e.CeNi_(5) alloy) with splendid catalytic action for boosting the hydrogen storage property of magnesium hydride (MgH_(2))The MgH2–5wt%CeNi_(5) composite’s initial hydrogen release temperature was reduced to 174℃ and approximately 6.4wt%H_(2) was released at 275℃ within 10 min.Besides,the dehydrogenation enthalpy of MgH_(2) was slightly decreased by adding CeNi_(5).For hydrogenation,the fully dehydrogenated sample absorbed 4.8wt%H_(2) at a low temperature of 175℃.The hydrogenation apparent activation energy was decreased from(73.60±1.79) to (46.12±7.33) kJ/mol.Microstructure analysis revealed that Mg_(2)Ni/Mg_(2)NiH_(4) and CeH_(2.73) were formed during the process of hydrogen absorption and desorption,exerted combined“Gateway”and“Spillover”effects to reduce the operating temperature and improve the hydrogen storage kinetics of MgH_(2).Our work provides an example of merging“Gateway”and“Spillover”effects in one catalyst and may shed light on designing novel highly-effective catalysts for MgH_(2) in near future. | Mengchen Song Runkai Xie Liuting Zhang Xuan Wang Zhendong Yao Tao Wei Danhong Shang | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，5： | 0 |
| 2 | Implementing the free HPV vaccination for adolescent girls aged below 14 in Shenzhen,Guangdong Province of China:experience,challenges,and lessons显示文摘Cervical cancer is a major public health concern in China,accounting for almost one-fifth of the global incidence and mortality.The recently prequalified domestic bivalent human papillomavirus(HPV)vaccine offers a practical and feasible preventive measure.In response to the global call for action,the National Health Commission issued an Action Plan to eliminate cervical cancer by 2030,with promotion of the HPV vaccination for school-aged girls as a critical step.Despite this,implementation of the vaccination has been patchy,with very low coverage among eligible girls.To address this,from December 2021 to December 2022,a demonstration project was launched in Shenzhen,Guangdong Province,to promote the inclusion of HPV vaccine in local immunisation programme and to address existing barriers to implementation.Using multiple sources of data,this article presents a case study of the demonstration project,analysing its impact on rolling out HPV vaccination among eligible girls and identifying any challenges encountered during implementation.The demonstration project has shown promising results in increasing the HPV vaccination rate,promoting public awareness and acceptance of the domestic HPV vaccine,and establishing a model for quickly scaling up the vaccination at the municipal level.The success of the project can be attributed to several factors,including strong governmental commitment,sufficient funding,multi-sectoral collaboration,ensured vaccine accessibility and affordability,improved vaccination services,and effective health education and communication strategies.Lessons learned from Shenzhen can provide valuable insights for future advocacy and implementation of the vaccination in other areas of China,but challenges must be addressed to achieve universal coverage.These include addressing vaccine hesitancy,expanding the programme to cover a broader age range,and ensuring consistent quality of vaccination services in primary care facilities.Overcoming these challenges will require innovative strategies,public-private partnerships,and sustained funding and resources.Future research should focus on evaluating the long-term effectiveness of the vaccination programme and identifying contextual factors that may impact its implementation in different settings.Overall,the effective control of cervical cancer in China will rely on the“political will”to ensure the incorporation of preventive interventions into policies and universal programme coverage. | Dadong Wu Peiyi Liu Danhong Song He Wang Siqi Chen Wanyi Tang Xuelian Zhao Fanghui Zhao Yueyun Wang | 2023 | Infectious Diseases of Poverty2023，12，5： | 0 |
| 3 | FeCoNiCrMo high entropy alloy nanosheets catalyzed magnesium hydride for solid-state hydrogen storage显示文摘The catalytic effect of FeCoNiCrMo high entropy alloy nanosheets on the hydrogen storage performance of magnesium hydride(MgH_(2))was investigated for the first time in this paper.Experimental results demonstrated that 9wt%FeCoNiCrMo doped MgH_(2)started to dehydrogenate at 200℃and discharged up to 5.89wt%hydrogen within 60 min at 325℃.The fully dehydrogenated composite could absorb3.23wt%hydrogen in 50 min at a temperature as low as 100℃.The calculated de/hydrogenation activation energy values decreased by44.21%/55.22%compared with MgH_(2),respectively.Moreover,the composite’s hydrogen capacity dropped only 0.28wt%after 20 cycles,demonstrating remarkable cycling stability.The microstructure analysis verified that the five elements,Fe,Co,Ni,Cr,and Mo,remained stable in the form of high entropy alloy during the cycling process,and synergistically serving as a catalytic union to boost the de/hydrogenation reactions of MgH_(2).Besides,the FeCoNiCrMo nanosheets had close contact with MgH_(2),providing numerous non-homogeneous activation sites and diffusion channels for the rapid transfer of hydrogen,thus obtaining a superior catalytic effect. | Tao Zhong Haoyu Zhang Mengchen Song Yiqun Jiang Danhong Shang Fuying Wu Liuting Zhang | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，11： | 0 |
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