Search

In this work, we demonstrated a facile strategy to fabricate paintbrush-like Co Doped Cu 3 P architecture grown on porous copper foam (Co-Cu 3 P/CF), which was obtained from cation exchange reaction followed by a pyrolysis assisted phosphorization step. Co-Cu 3 P/CF showed outstanding electrocatalytic performance for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in 1 M NaOH solution, affording low overpotential of 270 mV to reach the current density of 50 mA cm−2 for OER. As for HER, a low overpotential of 200 mV is required to obtain the same catalytic current density. The overall water electrolyzer by using Co-Cu 3 P/CF as both anode and cathode showed a low cell voltage of 1.55 V to deliver 10 mA cm−2. The excellent electrocatalytic performance of Co-Cu 3 P/CF could be ascribed to its paintbrush-like hierarchical architecture, offering plentiful of active sites and accelerating electrolyte penetration, the presence of Co dopant also could rationally modify its electronic properties, and thus lead to the synergetic effects. • Co-Cu 3 P architectures in-situ grown on copper foam was prepared via a facile method. • The paintbrush-like morphology of Co-Cu 3 P is beneficial for exposing plentiful of catalytic active sites. • The overall water splitting cell showed a low cell voltage of 1.55 V to deliver 10 mA cm−2. • Co dopants play a vital role in enhancing the catalytic performance of Co-Cu 3 P. [ABSTRACT FROM AUTHOR]

Abstract Greed is ubiquitous in human existence. However, empirical research on greed is surprisingly rare, in part due to a lack of sound scales to measure it. This article reports on 3 studies that test the Chinese version of the Dispositional Greed Scale (DGSC) using 4 samples with a total of 1048 participants. Study 1 and study 2 provide evidence for the factorial validity, internal consistency, convergent validity and criterion-related validity of the DGSC. Study 2 and study 3 present evidence for the concurrent validity of the DGSC from three aspects: a) the DGSC was positively correlated with Belief in a Zero-Sum Game and subjective socio-economic insecurity; b) the DGSC was negatively correlated with all facets of core self-evaluations (i.e., self-esteem, generalized self-efficacy, locus of control, neuroticism) except neuroticism, with which the DGSC was positively correlated; and c) the DGSC was negatively correlated with all facets of external core evaluations (i.e., trust in people, belief in a just world, belief in a benevolent world). These findings provide new insight into the nomological net of greed and shed light on the beliefs and behaviors of greedy people in economic transactions and their fundamental attitudes toward the self, others and the external environment. [ABSTRACT FROM AUTHOR]