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Revealing the inner relationship between different active sites is of great significance to the rational design of highly efficient electrocatalysts for HER. Herein, two doping modes of boron, doping on the surface of Ru (B-Ru/CNT) and into carbon nanotubes (Ru/B-CNT), have been undertaken by using closo-[B12H12]2− as a B precursor through in situ reduction and calcination. According to experimental and DFT calculation results, the two B doping methods can both help reduce the electron density of Ru, which favors an enhancement in HER performance. More importantly, B doped into supports can further improve charge transfer efficiency. As a result, Ru/B-CNT exhibits an impressive HER performance (η10 = 15 mV) with fast reaction kinetics, as well as outstanding stability, which is much higher than those of undoped and surface-doped Ru-based catalysts. [ABSTRACT FROM AUTHOR]

Aim Design Methods Results Patient or public contribution To construct a popularization of an emergency science capacity index system for nurses based on the iceberg model.A mixed‐method research design incorporating quantitative and qualitative components was used.In this study, the first draft of the questionnaire was developed through literature analysis and semi‐structured interviews. According to the Delphi expert inclusion criteria, 20 experts with rich experience in the field of science popularization were selected, and the system of emergency science popularization ability of nurses was ultimately developed through two rounds of consultation according to the Delphi method. The weights of various indicators were determined through hierarchical analysis.Following two rounds of Delphi surveys, a total of 3 primary, 6 secondary, and 26 tertiary indicators were identified. The indicators were found to be highly significant, with variation coefficients ranging from 0.063 to 0.140. The Kendall's harmonization coefficients for the primary, secondary, and tertiary indicators were 0.350, 0.341, and 0.146, respectively. The popularization of the emergency science capacity system has a certain scientific and practical significance, which is of guidance to the competency of nurses in public health emergencies.No patient or public contribution. This study did not involve patients, service users, caregivers, or members of the public. [ABSTRACT FROM AUTHOR]

Carbon nanomaterials doped with N and B could activate nearby carbon atoms to promote charge polarization through the synergistic coupling effect between N and B atoms, thus facilitating adsorption of O 2 and weakening O-O bond to enhance oxygen reduction reaction. Herein, a simple and controllable self-assembly strategy is applied to synthesize porous B, N co-doped carbon-based catalysts (BCN-P), which employs the macrocyclic molecule cucurbit[7]uril (CB7) as nitrogen source, and 3D aromatic-like closo-[B 12 H 12 ] 2- as boron source. In addition, polystyrene microspheres are added to help introduce porous structure to expose more active sites. Benefitting from porous structures and the synergistic coupling effect between N and B atoms, BCN-P has a high onset potential (E onset =0.846 V) and half-wave potential (E 1/2 =0.74 V) in alkaline media. The zinc-air battery assembled with BCN-P shows high operating voltage (1.42 V), peak power density (128.7 mW cm -2 ) and stable charge/discharge cycles, which is even comparable with Pt/C., (© 2024 Wiley-VCH GmbH.)