Henan University of Engineering

Catalyst supports are indispensable for efficient water dissociation since they play key roles in either indirectly enhancing catalysis activity by modifying electronic structures of catalysts or directly participating in catalytic reaction. MXene has recently emerged as a promising catalyst support for water dissociation by virtue of its rich surface electronic states that enable various electronic modifications of catalysts, but its potential of directly interacting with reactants or products to accelerate catalytic dynamics in water dissociation remains unexplored. Here we report our finding that phosphate anion-engineered MXene is capable of significantly accelerating water dissociation on single-atom ruthenium-copper (Ru-Cu) alloy, achieving a record-high mass-specific activity of 746 L gRu -1 min-1 under light conditions at room temperature. This is mainly enabled by the accelerated hydrogen spillover effect, which results from the phosphate anion-induced electronic modification of titanium sites on MXene following the light-enhanced activation of ammonia borane and water molecules on Ru-Cu active sites. This underlying mechanism is elucidated by a combination of in situ spectroscopic characterizations and density function theory calculations. This work unveils a previously unrecognized catalytic role of MXene-based supports and offers a new design strategy for enhancing water dissociation through tailored support-catalyst-reactant interactions.

Guided by social exchange theory, this study examines how the dual leadership behavior of authoritarian-benevolent leadership in mentorship affects craftsman spirit within China’s manufacturing sector amidst its transformation and upgrading. A theoretical model positioning loyalty as a mediator was developed to elucidate how different configurations of benevolent and authoritarian leadership influence craftsman spirit through reciprocal social exchanges. Using polynomial regression and response surface analysis on survey data from 343 master-apprentice dyads, the findings indicate that: (1) when benevolence and authority are aligned, high levels of both yield no significant advantage over low levels of both in promoting craftsman spirit; (2) when benevolence and authority are misaligned, high benevolence coupled with low authority more effectively fosters craftsman spirit than the reverse; (3) loyalty mediates the relationship between high benevolence-low authority leadership and craftsman spirit. These results suggest that manufacturing firms should incorporate ambidextrous leadership into master selection and training, while establishing institutionalized master-apprentice pairing mechanisms and emotional bank account management to systematically cultivate craftsman spirit.

ABSTRACT Polyamide 1012 (PA1012) composites with balanced strength and toughness were fabricated by blending with lanthanum‐neutralized polyolefin elastomer (POE) ionomers and nano‐alumina grafted with nylon short chains (Al 2 O 3 ‐PA). Al 2 O 3 ‐PA was synthesized based on in situ polymerization, while POE ionomers with different glutamic acid/maleic anhydride mole ratios were prepared through melt‐blending. The multiple interactions between La 3+ ‐carboxyl/amide groups and dynamic networks formed by chain entanglement of Al 2 O 3 ‐PA with PA1012 and POE ionomers significantly improved PA1012's mechanical properties. Compared with pure PA1012, the impact toughness (92.0 kJ/m 2 ) of PA1012/POE ionomer/Al 2 O 3 ‐PA composites was 14 times higher while the tensile strength (53.4 MPa) retained 86.1% of its value. Rheological characterization showed decreased melt viscosity, helping with processing challenges in rubber‐toughened plastics. The toughening mechanism was attributed to matrix yielding, elastomer particle deformation, and dynamic network destruction. This work provides an efficient strategy for designing high‐performance polyamide composites with balanced mechanical properties and enlarging their applications in automotive, electronics and military fields.

Problematic smartphone use among adolescents can lead to various negative consequences. Parental active mediation has been identified as an effective strategy to mitigate these problems. In response, numerous parent training programs have been developed. However, it remains unclear whether these programs can effectively enhance parents' active mediation. A 2 (group: experimental vs. control) × 3 (time: pretest, post-test, follow-up) mixed factorial design was employed to examine the effects of parent training on parents' active mediation. A total of 60 parents of adolescents with problematic smartphone use participated in the experiment. Parents in the experimental group attended a six-session parent training program, while those in the control group received no intervention. Parental active mediation was assessed using a validated self-report scale at all three time points. Results indicated significant main effects of group and time, as well as a significant group × time interaction. Among parents with the same initial level of active mediation, those who participated in the training demonstrated higher levels of active mediation than those in the control group, and this improvement was maintained two months later. These findings provide empirical evidence that parent training can sustainably enhance parents' active mediation in managing adolescents' smartphone use.

In this paper, an elastic-constant stress cohesive zone model is developed to analyze the interfacial behavior of a one-dimensional hexagonal piezoelectric quasicrystal film bonded to a couple-stress half-plane substrate, with surface effects taken into account. By imposing perfect bonding conditions and adopting a membrane assumption, the governing integral equation is constructed and numerically solved using the Chebyshev polynomial expansions. An iterative method is proposed to determine the cohesive zone size, and analytical expressions for the stress and strain distributions are derived. Systematic parametric studies are performed to elucidate the effects of characteristic length scales, substrate couple-stress length, film’s aspect ratio, and substrate-to-film stiffness ratio on the stress–strain fields and the evolution of the cohesive zone. The results provide foundational insights into interfacial mechanics and offer design guidelines for developing reliable, high-performance piezoelectric quasicrystal film devices.