BackgroundNursing has a high risk of job burnout, but only a few studies have explored its influencing factors from an organizational perspective. ObjectiveThe present study explores the impact of psychological capital on job burnout by investigating the mediating effect of organizational commitment on this relationship. MethodsA total of 473 female nurses from four large general hospitals in Xi’an City of China were selected as participants. Data were collected via the Psychological Capital Questionnaire, the Maslach Burnout Inventory-General Survey, and the Organizational Commitment Scale. ResultsBoth psychological capital and organizational commitment were significantly correlated to job burnout. Structural equation modelling indicated that organizational commitment partially mediated the relationship between psychological capital and job burnout. ConclusionThe final model revealed a significant path from psychological capital to job burnout through organizational commitment. These findings extended prior reports and shed some light on the influence of psychological capital on job burnout.

This study aimed to explore how core self-evaluations influenced job burnout and mainly focused on the confirmation of the mediator roles of organizational commitment and job satisfaction. A total of 583 female nurses accomplished the Core Self-Evaluation Scale, Organizational Commitment Scale, Minnesota Satisfaction Questionnaire, and Maslach Burnout Inventory-General Survey. The results revealed that core self-evaluations, organizational commitment, job satisfaction, and job burnout were significantly correlated with each other. Structural equation modeling indicated that core self-evaluations can significantly influence job burnout and are completely mediated by organizational commitment and job satisfaction.

BackgroundDeath anxiety is a common phenomenon in all societies. Older adults may be more prone to death anxiety than their younger counterparts; however, death anxiety among older adults is not well understood. This study explores the relationship between meaning in life, self-esteem, and death anxiety in senior citizens in China.MethodsA total of 283 older adults participated in this study; data were collected via the Meaning in Life Questionnaire, the Rosenberg Self-Esteem Scale, and the Death Anxiety Scale.ResultsResults show that the dimensions of meaning in life, presence of meaning (r = − 0.43, p < 0.01), search for meaning (r = − 0.31, p < 0.01), and self-esteem (r = − 0.54, p < 0.01) were each negatively correlated with death anxiety. Regression analysis reveals that meaning in life significantly predicted self-esteem and death anxiety (F = 45.70, p < 0.01; R2 = 0.33). Path analysis indicated that self-esteem either completely or partially mediated the effects of meaning in life on death anxiety in older adults.ConclusionsOverall, meaning in life appears to be significantly correlated with death anxiety in older adults, and self-esteem can mediate this effect.

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Perovskite oxides have attracted much attention for enabling the oxygen-evolution reaction (OER) over the past decades. Nevertheless, their poor conductivity is still a barrier hindering their use. Herein, we report a catalyst prototype of Co-based antiperovskite nitrides CuNCo3–x V x (0 ≤ x ≤ 1) to be a highly effective OER electrocatalyst. The synthesized CuNCo3–x V x exhibits greatly enhanced activity and stability toward the OER in alkaline medium. The CuNCo2.4V0.6 shows a mere 235 mV of overpotential to reach 10 mA cm–2, which is comparable to that of Ir/C (232 mV). More importantly, the CuNCo2.4V0.6 is more durable than the conventional Ir/C catalyst. The CuNCo2.4V0.6 catalyst enabled a Zn–air battery to exhibit a cycle life of 143 h with a much higher cell efficiency. The V-substituted CuNCo2.4V0.6 provides a higher content of the desirable Co3+ species in the post-OER catalyst, which ensures a high activity over a long-term operation. With these enhanced effects enabled by the compositional flexibility of CuNCo3–x V x antiperovskite nitride, a feasible strategy for optimizing an electrocatalyst with tunable properties is provided.