Customer sustainable consumption behaviors have attracted considerable attention recently. However, existing studies have been focused on individual sustainable consumption behaviors in a traditional ...economy context, such as energy saving, recycling, and green product consumption, and continuously ignoring its role in sharing economy. This study develops one conceptual model to explore how customer sustainable consumption behaviors are mobilised in the sharing economy context, drawing on the social exchange theory. Using a large data (Nvalidsample = 2967) crawled from a peer-to-peer (P2P) accommodation platform website (i.e. xiaozhu), we test the model to explore how customer sustainable consumption behaviors are boosted and expressed in the context of sharing economy. Specifically, drawing from the reciprocity tenet of social exchange theory, we show that social factor (i.e. social influence) exerts positive influence on customer sustainable consumption behaviors, whereas economic factor (i.e. price) exerts negative influence on customer sustainable consumption behaviors. Consequently, increased customer sustainable consumption behaviors result in improved objective sales performance. Furthermore, we also conclude that a service provider's strategies (i.e. reputation and response rate) could positively enhance the effect of social influence on customer sustainable consumption behaviors while the value of these strategies are limited and insignificant in the effect of price.
•Specific sustainable consumption behaviors are studied in sharing economy context.•Social and economic factors matter in boosting customer sustainable consumption behaviors.•The roles of social and economic factors depend on the service provider's reputation and response rate.•Sustainable consumption behaviors could facilitate service provider's actual sales performance.
The long-term durability of the catalyst layers of a low-working temperature fuel cell such as a polymer electrolyte membrane fuel cell (PEMFC) is of significant scientific interest because of their ...operation criteria and high initial cost. Identification of degradation mechanisms quantitatively during an accelerated stress test (AST) is essential for assessing and improving the durability of such catalyst layers. In this study, we present a quantitative analysis of the degradation mechanisms such as (i) electronic connectivity loss due to carbon support corrosion, (ii) proton connectivity loss due to ionomer/catalyst interface loss, (iii) catalyst loss due to dissolution or detachment, and (iv) physical surface area loss due to particle growth that is responsible for the electrochemical surface area (ECSA) loss in Pt-based catalyst layers for PEMFCs during an AST performed through potential cycling (linear sweep cyclic voltammetry) between 0.4 and 1.6 V for 7000 cycles in Ar-saturated 1 M H2SO4. Using a half-membrane electrode assembly (half-MEA), where a gas diffusion electrode with genuine three-phase boundaries is used as a working electrode through a solid electrolyte, we have observed the ECSA loss due to ionomer/catalyst interface loss and identified a catalyst heterogeneous degradation pattern during an AST. Results suggest a significant ECSA loss due to catalyst isolation (∼64% of ECSA loss) from loss of electron and proton connectivities by catalyst support corrosion (∼45%) and ionomer/catalyst interface loss (∼19%), followed by particle growth (∼30%) and dissolution/detachment (6%). Such knowledge and methodology can effectively contribute to catalyst material screening and electrode structure development to advance the PEMFC technology.
ABSTRACT
Most crowdfunding studies have examined factors that contribute to the success in the funding stage of a crowdfunding project, while little is known about success‐promoting factors in the ...postfunding stage. Based on customer value theory, this study investigates (a) the main effects of customer value propositions on project performance in both the funding stage and the postfunding stage and (b) how factors about customer value delivery moderate these main effects. We found that price incentive had a positive effect on funding performance in the funding stage, whereas the effect of personalization was negative. Price incentive was not found to influence postfunding satisfaction in the postfunding stage, while personalization exerted a positive effect. As indicators associated with customer value delivery, both creator's project experience and promised delivery time demonstrated interaction effects with personalization but not with price incentive on funding performance. These factors also interacted with price incentive to affect satisfaction. This study offers insights to help project creators achieve a balance between proposing economic value and relational value while the creators can leverage their project experience and promised delivery time for successful crowdfunding projects.
By introducing the self-construal theory to the virtual brand community literature, this study examines how self-construal interacts with community rewards and public self-consciousness to influence ...customer participation. Based on data collected from two communities in China, we found that independent construal had a stronger positive direct effect on the intention to participate than did interdependent construal. The effect of independent construal on intention was attenuated by community reward and public self-consciousness. In comparison, the effect of interdependent construal on intention was enhanced by public self-consciousness, but this strengthening effect did not exist for community rewards. A significant association between intention and actual participation was also found.
An environmentally benign protocol of chemoselective transfer hydrogenation of C=C and C=O bonds with alkanols under base‐free conditions is developed by this study, wherein the cobalt‐ bidentate ...phosphine catalyst precursor is commercially available and the active low‐valent Co species could be generated in‐situ. For the conjugation enones, the vinyl group is selectively reduced, whereas with nonconjugated alkenones, the selectivity is changed to the carbonyl group. Besides, ortho‐alkenyl‐benzaldehydes/imines are well tolerated, and the reduction solely occurs at the C=O/C=N site with this protocol.
Low‐cost and sustainable: An environmentally benign protocol of Co‐bidentate phosphine complex‐catalyzed chemoselective transfer hydrogenation of C=C and C=O bonds with equivalent alkanols under base‐free conditions was developed.
Food security was not only an important cornerstone of China's national rejuvenation, but also a matter of achieving the UN's Sustainable Development Goals. The spatial explicit and multi-scale ...comparative study of China's food security risk pattern was insufficient. Therefore, this study explored the spatio-temporal evolution and scale differences of food security risk pattern in China at micro- (pixel: 1km × 1 km), meso- (county) and macro (provincial) scales by constructing Food Security Risk Assessment models and Food Security Indexes (FSI) that were applicable to various scales, and provided theoretical basis and data support for the country and governments at all levels to formulate food security guarantee strategies. The results showed that the food security risk is quite different on different sides of Ejina-Longhai Line in 2018 at micro-scale. The food security situation in the area east of the Ejina-Longhai Line was generally good, while the area west of the Ejina-Longhai Line had higher food security risks. From 1990 to 2018, China's food security risks were spatially positively correlated and have significant global spatial agglomeration characteristics. In 1990, 2000 and 2018, the local spatial autocorrelation of food security risk at micro- and meso-level was similar. In the last decade of the 20th century, the food security situation in China showed a deteriorating trend due to the difference in the growth rate of total grain output and total population. Since the beginning of the 21st century, rapid increase in grain yields significantly reduced food security risks in China. The changes in food security index at micro- and meso-scales had a high similarity, however, the evaluation results at the meso-scale would underestimate the national food security risks. In addition, the larger the range (scale) of the evaluation unit, the more drastic the temporal variation in food security index, that is, the lower the stability. Scale differences and lower stability lead to evaluation results at the macro-scale that underestimate food security risks in the year of good harvest and overestimate food security risks in the year of poor harvest.
Different types of crowdfunding backers adopt various social and economic roles, beyond just financial support. Yet the most appropriate message strategy for attracting these different types of ...backers remains unclear. To fill this gap, using insights into advertising appeals and the elaboration likelihood model (ELM), we propose a conceptual framework reflecting how the emphasis of the appeals in a crowdfunding message might influence support decisions by two types of backers: consumers and investors. Objective data from a crowdfunding website reveal that appeals that emphasize information (emotion) exert more positive persuasive effects on consumer (investment) backers than on investment (consumer) backers. When devising the appeal emphasis, entrepreneurs thus must make a trade-off while also considering contingent factors such as decision control, social orientation, and reward tangibility. The practical implications of these findings suggest that entrepreneurs should activate backers’ information processing routes differentially, using distinct appeal emphases, rather than relying on an undifferentiated message strategy.
Advanced and sustainable energy storage technologies with tailorable electrochemically active materials platform are the present research dominancy toward an urgent global need for electrical ...vehicles and portable electronics. Moreover, intensive efforts are given to screen the widely available low‐cost materials with a focus to achieve superior electrochemical performance for the fabrication of energy storage devices. Transition metal‐based sulfides have prodigious technological credibility due to their compositional‐ and morphological‐based tunable electrochemical properties. Here the significant advances and present state‐of‐the‐art of such assured materials in different energy storage devices are discussed. Assessment of the intensive work invested in the progress of transition metals such as V, Mn, Fe, Co, Ni, Cu, Zn Mo, and W based sulfides along with their structural/compositional engineering and addressable aspects for electrochemical performance enhancement are highlighted. Additionally, discussions on critical strategies for decisive mechanistic and kinetic views for charge storage phenomena with key challenges, such as volume expansions, low stability, and sluggish kinetics, are discussed. Finally, the challenges and future prospects demands for strategic approaches of such materials with prominence in futuristic directions are concluded.
This article is categorized under:
Energy Efficiency > Science and Materials
Energy Research & Innovation > Science and Materials
Metal sulfides as efficient electrode materials for supercapacitors.
High industrial demand and limited global abundance of precious metals (PMs) make their recycling essential for industrial and societal sustainability. Owing to their high surface-to-volume ratio, ...recycling of nanoparticulate precious metals through dissolution in dilute acids at room temperature is quite relevant. However, their dissolution by approaches such as the cyclic oxidation-reduction of metal surfaces through surface potential manipulation may not be suitable for large-scale production. Here, we demonstrate fast dissolution of Pt-nanoparticles under mild conditions (normal temperature and pressure) in Cl
−
containing dilute acidic/neutral baths without using cyclic oxidation-reduction. We demonstrate that the dissolution of Pt nanoparticles through PtCl
x
2−
complexing is hindered by blockage of the Pt surface due to adsorption of non-oxide species (impurities), a phenomenon termed herein as non-oxide passivation (NOP). The nanoparticles can be kept active for the PtCl
x
2−
complexing through removal of the adsorbed species by surface activation, a process to remove the NOP layer by application of cyclic/continuous perturbation. As an example, average % dissolution rate (calculated on initial Pt loading) increases from ∼10% per h (∼30% dissolution in 3 h) for dissolution without NOP removal to ∼19% per h (∼55% dissolution in 3 h) for dissolution through cyclic activation of the Pt surface by HCl-water cycling. The approach may be implemented with a range of cost-efficient and non-toxic reagents for industrial-scale and environmentally friendly recycling of Pt.
High industrial demand and limited global abundance of precious metals (PMs) make their recycling essential for industrial and societal sustainability.
Thin film-rotating disc electrode (TF-RDE) experiment provides a fast research platform for screening of newly developed electrocatalysts for oxygen reduction reaction (ORR) activity; however, ...precise estimation of their performance parameters is necessary to avoid wastage of resources in the testing of otherwise unpromising electrocatalyst in actual fuel cells. Here we show the importance of the accurate amount of catalyst (e.g., Pt) on glassy carbon (GC) disk of RDE in TF-RDE experiment by characterizing the commercial catalysts for their electrocatalysis performance (electrochemical surface area and ORR activity) values. The Pt loadings used to calculate these performance values were obtained using two schemes, namely, using the literature based (conventional) scheme and an X-ray fluorescence (XRF) based scheme. A parameter called “catalyst-density-of-the-ink” is used to correlate the variations observed in performance values and the amount of Pt on GC disk of RDE obtained using both schemes. The investigation suggests that the actual Pt loading on the GC disk of RDE varies with the ink-conditions, which is considered constant in the conventional scheme and might be one of the reasons of irreproducibility of the data obtained by TF-RDE experiments. The XRF-based scheme, which is simple and direct, can have the potential to replace conventional scheme for accurate catalyst loading estimation, improve experimental reproducibility, and open many other possibilities (e.g., post-mortem analysis of catalyst) in electrocatalysis studies.
PDF
