Electrocatalytic conversion of CO2 over in-situ grown Cu microstructures on Cu and Zn foils

Electrochemical conversion of carbon dioxide to value added multi-carbon products is of great importance and a promising approach to mitigate greenhouse gases. In this work, we report the fabrication of electrodes by depositing Cu over the metallic foils of Cu and Zn, which show high faradic efficiency for the conversion of CO2 to formic acid, acetate, and methanol. The morphology, phase and oxidation state of the Cu were different on the two foils while maintaining the same synthesis steps. The Cu particles embedded on Cu foil (Cu/Cu-foil) are in 3D cuboids form with flat and smooth faces, whereas Cu on Zn foil (Cu/Zn-foil) emerge in the shape of 3D flowers with the club of Cu microspikes grown perpendicularly from a root. For the electrocatalytic conversion of CO2, the Cu/Cu-foil shows a high selectivity for formic acid and ethyl acetate with the highest faradaic efficiency of 78 % at −0.3 V vs RHE, and 64 % at −1.0 V (vs RHE) for the two products, respectively. In contrast, the Cu/Zn-foil displays a high selectivity towards methanol, with the highest faradaic efficiency of 48 % at −1.0 V vs RHE, indicating that the product selectivity can be easily modulated by changing the metallic foil on which the Cu particles are deposited. Both the electrodes, Cu/Cu-foil and Cu/Zn-foil, show long-term stable performance while maintaining the selectivity of the products during CO2 electrocatalytic conversion

Unleashing environmental performance: the impact of green entrepreneurial motivation on small enterprises

Background: Environmental degradation has been annoying, pressuring enterprises to look for innovative ways to improve their operations, methods and products. Aim: This research identifies the key factors contributing to developing innovative behaviour among small enterprises in Saudi Arabia and their effect on environmental performance (EP). Method: The study collected a sample of 284 from different types of small enterprises operating in Saudi Arabia. The data collected were analysed using the partial least square structural equation modelling (PLS-SEM). Results: The study revealed interesting results. It was found that green entrepreneurial motivation (GEM) can positively and significantly influence green innovation (GI) as well as environmental performance. It was also found that green innovation can positively and significantly affect environmental performance. Finally, green innovation could mediate the relationship between green entrepreneurial motivation and environmental performance. Also, Knowledge sharing (KS) could moderate the relationship between green entrepreneurial motivation and green innovation. Conclusion: The study concluded by providing several recommendations for the policymakers in Saudi Arabia

Fostering potential entrepreneurs: An empirical study of the drivers of green self-efficacy in Saudi Arabia

The positive role of entrepreneurship and micro and small enterprises in providing job opportunities necessitated a further investigation into the critical individual factors motivating individuals and potential entrepreneurs (students) to develop their entrepreneurial intentions and act green. Accordingly, we aimed to examine the effects of crucial factors—environmental self-identity (ESI) and green mindfulness (GM)—on students’ (potential entrepreneurs’) development of green self-efficacy (GSE) and to examine the influence of GSE on their green entrepreneurial intentions (GEIs). The study sample of 202 potential entrepreneurs was drawn from two Applied and Business Administration Colleges at King Faisal University. The collected data were analysed and interpreted using partial least squares structural equation modelling (PLS-SEM). The research produced exciting results showing that ESI and GM positively influenced GSE and that GSE positively affected GEI. The results also revealed GSE’s capability to mediate the connection between GM, ESI, and GEI. This paper concludes by providing several suggestions for decision-makers in the study context

Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique

Herein, we report the synthesis of silver-based electrocatalysts (Ag/C, AgCo/C, and AgNi/C) using solution combustion method and their performance towards methanol oxidation reaction. Detailed structural and microscopic analysis confirmed the formation of graphitic carbon, synthesis of crystalline phases with high porosity in all the three electrocatalysts. X-ray photoelectron spectroscopic (XPS) analysis showed a high concentration of Ag2O (or Ag+) on AgNi/C, whereas AgCo/C exhibited a high concentration AgO (or Ag2+) on the surface. XPS analysis on C 1s confirmed the highest concentrations of the sp2 hybridized C-C bond on Ag/C, C-O on AgNi/C, and O-C-O bond on AgCo/C, respectively. The X-ray absorption spectroscopy (XAS) analysis on Ag edge showed a similarity in the bond lengths in AgCo and AgNi samples to that of bulk silver, that has a bond length of 2.89 Å, with only silver-silver scattering and the absence of a different or a nonsilver metal in the nanoparticles. This indicates that there is no Ag-M alloying. Nonetheless, a significant difference in particle sizes was observed, with 2.5 and 6 nm, respectively for AgNi and AgCo. Methanol electrooxidation experiments performed on the electrocatalysts indicated AgNi/C to show better performance in comparison to AgCo/C and Ag/C. Anodic polarization curves obtained from linear sweep voltammetry (LSV) measurements demonstrated a superior performance of AgNi/C with an onset potential of 0.41 V. In addition, 20 h chronoamperometry experiment also confirmed a sustained superior performance of AgNi/C catalyst, which could be due to smaller particle size and stabilization of Ag+ on the surface of the catalyst.This work was made possible by the NPRP grant (NPRP13S‐0109‐200029 and NPRP8‐145‐2‐066) from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. Use of the Advanced Photon Source is supported by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences, under contract DE‐AC02‐06CH11357. Authors would also like to acknowledge Dr. Md. Abdul Matin for his initial support on catalysts synthesis and characterization. The authors would also like to acknowledge QEERI Core Labs for their support related to the TEM characterization

Improving social performance through innovative small green businesses: knowledge sharing and green entrepreneurial intention as antecedents

Small businesses are thought to be largely responsible for environmental pollution despite the fact that businesses of all shapes and sizes contribute to this issue. This research explores how important factors such as knowledge sharing (KS) and green entrepreneurial intention (GEI) might help small businesses in Saudi Arabia develop and implement green innovation (GI). It also seeks to determine whether GI is a mediating variable that explains the connection between GEI, KS, and social performance (SP). Accordingly, an online survey was used to collect responses from 284 small entrepreneurs in Saudi Arabia engaged in various types of business activities. The study used partial least squares structural equation modelling for data analysis and hypothesis testing. The results show that GI considerably influences SP while also having a significant link with both GEI and KS. Further, the study reveals that the relationship between GEI, KS, and SP is mediated by GI. The study offers a plethora of suggestions to various stakeholders generally and to Saudi authorities specifically

Entrepreneurial motivation, competency and micro-enterprise sustainability performance: evidence from an emerging economy

Small to medium-sized enterprises suffer from loss of competitive advantage, low productivity, and poor performance because of inadequate competencies. Therefore, the primary objective of this study was to examine the effect of selected motivational dimensions (i.e., self-improvement, self-confidence, openness to change, pull factors, and the need for achievement) on entrepreneurial competency among micro-entrepreneurs. We used a cross-sectional design and collected quantitative data from 403 micro-entrepreneurs in Malaysia using random sampling. SEM-PLS was used for data analysis. The findings revealed that self-confidence, openness to change, and pull factors positively influenced entrepreneurial competencies. Moreover, there was a positive effect of self-confidence, pull factors, need for achievement, and entrepreneurial competency on enterprise sustainability performance. Furthermore, entrepreneurial competencies significantly mediated the effect of self-confidence, openness to change, and pull factors on enterprise sustainability performance. Apart from extending the lens of a resource-based view, this study enriches enterprise sustainability literature from emerging nations’ perspective. Policymakers can strengthen their programs and policies to improve the entrepreneurial competencies of micro-entrepreneurs and their business sustainability

Entrepreneurial motivation, competency and micro-enterprise sustainability performance: evidence from an emerging economy

Small to medium-sized enterprises suffer from loss of competitive advantage, low productivity, and poor performance because of inadequate competencies. Therefore, the primary objective of this study was to examine the effect of selected motivational dimensions (i.e., self-improvement, self-confidence, openness to change, pull factors, and the need for achievement) on entrepreneurial competency among micro-entrepreneurs. We used a cross-sectional design and collected quantitative data from 403 micro-entrepreneurs in Malaysia using random sampling. SEM-PLS was used for data analysis. The findings revealed that self-confidence, openness to change, and pull factors positively influenced entrepreneurial competencies. Moreover, there was a positive effect of self-confidence, pull factors, need for achievement, and entrepreneurial competency on enterprise sustainability performance. Furthermore, entrepreneurial competencies significantly mediated the effect of self-confidence, openness to change, and pull factors on enterprise sustainability performance. Apart from extending the lens of a resource-based view, this study enriches enterprise sustainability literature from emerging nations’ perspective. Policymakers can strengthen their programs and policies to improve the entrepreneurial competencies of micro-entrepreneurs and their business sustainability

Heat Stroke in Emergency Department: Diagnosis and Management

Background: Heat stroke is a severe health concern with the potential for multi-organ failure, necessitating rapid and effective management. With rising global temperatures, there is increasing concern regarding the vulnerability of populations in high-heat areas, notably in Saudi Arabia, especially during the annual Hajj pilgrimage. Objective: This paper aims to review the epidemiology, evaluation and management techniques of heat stroke, emphasizing the situation during Hajj pilgrimages in Saudi Arabia, and to outline the best practices for emergency management. Methodology: A comprehensive review of literature and studies related to heat stroke, both globally and specific to Saudi Arabia, was undertaken. An in-depth analysis of emergency management, including initial assessment, cooling methods, organ support, medication, and prevention strategies, was conducted. Results: Heat stroke remains a significant cause of emergency department visits, with specific groups, such as men and the elderly, being more susceptible. During the Hajj in 2016, 267 patients were diagnosed with heat-related illnesses, with heatstroke accounting for 29% of these cases. With the threat of global warming, studies indicate a potential tenfold increase in heat stroke risk with a 2°C rise in temperatures. Swift and comprehensive cooling is pivotal for recovery. Management emphasizes rapid recognition, assessment, and varied cooling methods, along with targeted treatments for organ dysfunctions. Prevention strategies play a vital role, given the higher efficacy and practicality over treating organ dysfunctions. Conclusion: Heat stroke is a pressing health challenge, particularly in high-risk environments like Saudi Arabia during the Hajj pilgrimage. While effective emergency management protocols exist, an emphasis on prevention is crucial. It is imperative to incorporate a comprehensive approach to address both the immediate threat and long-term risks of heat stroke, especially with the looming challenge of global warming