SOx Functionalized NiOOH Nanosheets Embedded in Ni(OH)2 Microarray for High-Efficiency Seawater Oxidation.

A nano-micro heterostructure has been established to address the challenges of selectivity, stress, pitting corrosion, and long-term durability of anodes in unpurified seawater. The heterostructure comprised NiOOH nanosheets embedded within a high surface area Ni(OH)2 microarray, and the surface structure is further functionalized with sulfate (SOx ). This cation-selective protective layer impedes chloride (Cl- ) diffusion and abstracts H from reaction intermediates, leading to enhanced selectivity and corrosion resistance of the anode. The multilevel porosity within the randomly oriented nanosheets and the underlying support provide short diffusion channels for ions and mass migration, ensuring efficient ion transport and long-term structural and mechanical durability of the active sites, even at high current density. Remarkably, the catalyst requires a small input voltage of 400 mV to deliver a current density of 1 A cm-2 and maintains it for over 168 h without noticeable degradation or hypochlorite formation. Spectroscopic analysis and density functional theory (DFT) calculations reveal that the Ni electronic structure in the +3 valence state, its strong structural interaction with the underlying microarray, and the functionality of SOx significantly reduce the required potential for O-O coupling.

Developing recommendations to improve identification, prevention, and response to suicide thoughts and behaviours among post-secondary students: A mixed methods study.

Objective: This study aimed to generate recommendations regarding how to identify, prevent and respond to suicide thoughts and behaviors among post-secondary students. Methods: A convergent mixed-methods design with Nominal Groups Technique (NGT) was used. Post-secondary and high-school students and their caregivers generated and ranked recommendations. A Codebook Thematic Analysis approach guided analysis of the NGT-discussions and extended understanding of recommendations. Results: 88 individuals participated in 21 panels. Five key recommendations were identified: (1) increase student and staff education regarding suicide identification, prevention, and awareness of existing supports; (2) enhance rapid access to supports for those experiencing a crisis; (3) improve institutional academic supports for students following crisis; (4) reduce stigma; (5) improve communication regarding on-campus suicide. Common themes included perceived impact of attitudes, institutional barriers, and peer-support on suicide thoughts and behaviors. Conclusions: These recommendations can inform the development of student-centred interventions for improving mental health supports.