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The present study provides a summarised view of entrepreneurial intention (EI) research to date. Before the application of scientometric techniques over the 1920 papers retrieved from Scopus, this paper collects the main systematic reviews and pioneering bibliometric analyses, and summarises their major findings. The use of direct citation, differentiating between Local and Global Citation, has not been used in the area of EI research. However, it provides the current status quo of this field of research, as well as interesting results on the progress of the study of this research topic, revealing previously overlooked findings. The application of scientometric tools allows us to identify the four thematic poles that concentrate the greatest effort of researchers in this area: modelling EI and discussing its antecedents and relationships; self-efficacy as an antecedent of EI; social entrepreneurial intention; and the effect of education on EI -distinguishing the effect of educational context from the effect of personal factors on EI-. It also uncovers the inspirational role of this area of research on others, while revealing the most highly specialised journals in EI, the papers that play a foundational role in the field, and the authors with the most extensive careers in this topic. This research also assesses progress on the most important challenges facing the field and raises some unanswered questions.
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Exergy analysis, as a core evaluation tool to improve energy efficiency and system sustainability, has been applied in various fields over the last decades, leading to a significant increase of exergy-related publications. However, the existing reviews only analyzed part of publications related to a specific topic and lack a systematic analysis. To fill this research gap, a coupled bibliometric analysis and knowledge map method was conducted on 13,941 exergy-related publications during 1997-2020. Results show that publications increased from 54 in 1997 to 1976 in 2020. Journal of Energy is the most productive journals (1543 publications), and Energy & Fuels is the most popular subject category (9204 publications). Three developing countries in Asia (China, Iran, and Turkey) are the most productive, accounting for 45.87%. The main research objects and methods in this field were identified by cluster analysis. Furthermore, timeline analysis and burst detection analysis show that the new research hotspots or research frontiers will focus on organic Rankine cycle, building industry, multi-objective optimization, and sustainable development. This study further pointed out the future direction of the exergy field: in-depth application of the coupled exergy and exergoeconomic analysis; technologies development for efficient utilization of renewable energy, clean energy, and waste heat; enrichment of exergy framework incorporating environmental perspectives and mathematical methods; adaptation of theoretical research; and system optimization to the needs of social development. Through the review of exergy-related publications, results of this study can help to better identify the research hotspots and provide a valuable reference for future research.
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Bibliometría , Energía Renovable , China , Eficiencia , Modelos TeóricosRESUMEN
With the rapid industrialization, increasing of fossil fuel consumption and the environmental impact, it is an inevitable trend to develop clean energy and renewable energy. Hydrogen, for its renewable and pollution-free characteristics, has become an important potential energy carrier. Hydrogen is regarded as a promising alternative fuel for fossil fuels in the future. Therefore, it is very necessary to summarize the technological progress in the development of hydrogen energy and research the status and future challenges. Hydrogen production and storage technology are the key problems for hydrogen application. This study applied bibliometric analysis to review the research features and trends of hydrogen production and storage study. Results showed that in the 2004-2018 period, China, USA and Japan leading in these research fields, the research and development in the world have grown rapidly. However, the development of hydrogen energy still faces the challenge of high production cost and high storage requirements. Photocatalytic decomposition of water to hydrogen has attracted more and more research in hydrogen production research, and the development of new hydrogen storage materials has become a key theme in hydrogen storage research. This study provides a comprehensive review of hydrogen production and storage and identifies research progress on future research trend in these fields. It would be helpful for policy-making and technology development and provide suggestions on the development of a hydrogen economy.