PurposeFrom an environmental psychology perspective, we aim to uncover the role that app discoverability facilitators play in enabling the various perceived values (e.g. social, information and hedonic) necessary for app adoption.Design/methodology/approachA survey study was conducted and data was analyzed using partial least squares structural equation modeling (PLS-SEM).FindingsResults show that certain consumer review elements (i.e. review quality, review quantity and app ranking), peer influence and app developers' reputation — to varying degrees — influence the three perceived values, which subsequently affect users' app adoption intention. The three perceived values mediate the relationship between app discoverability facilitators and users' app adoption intention.Practical implicationsApp store managers and developers should make a greater effort to effectively optimize discoverability and product differentiation.Originality/valueGuided by environmental psychology, we confirm the importance of app discoverability facilitators regarding their influence on users' general perceptions of an app (e.g. the three perceived values). We also uncover the differentiated effect of the three perceived values on app adoption intention.

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Oxidative desulfurization (ODS) has been proved to be an efficient strategy for the removal of aromatic sulfur compounds from diesel oils, which are one of the main sources of air pollution. Heteropolyacid catalysts are highly active species for ODS, but the promotion of their catalytic activity and clarification of their catalytic mechanism remain an important issue. Herein, a series of novel imidazole-based heteropolyacid catalysts are prepared by a one-pot method for multiphase deep ODS of fuel with hydrogen peroxide as an oxidant. The experimental results show that the desulfurization performance of the prepared imidazole-based heteropolyacid catalysts is high up to 99.9% under mild conditions. The catalyst also possesses excellent recovery performance, and the desulfurization activity remains at 97.7% after being recycled seven times. Furthermore, density functional theory calculation is first employed to clarify the origin of the high desulfurization activity, and the results show that with the imidazole-based heteropolyacid (HPW-VIM) as the catalyst, the energy barrier is much lower than that with phosphotungstic acid (HPW) as the catalyst.

Remanufacturing has been widely adopted in the industrial sector due to carbon emission constraints and economic benefits. This paper discusses a closed-loop supply chain composed of an original equipment manufacturer (OEM), an authorized remanufacturer (AR), that is licensed by the OEM to carry out remanufacturing activities in the presence of strategic consumers under carbon cap-and-trade regulations. We establish a Stackelberg game model to identify the optimal manufacturing/remanufacturing decisions made by chain members, and compare the impacts of two different carbon allowance allocation rules on the optimal production decisions and profits, and on the environment. The results showed that optimal decisions in a closed-loop supply chain are affected by the carbon price, carbon allowance allocation, and consumer preferences for remanufactured products. In addition, for high-emission enterprises, the grandfathering rule performs better than the benchmarking rule, yielding higher profits and less environmental impact. The government should take into account the actual economic and production technological developments, implement the benchmarking rule for low-emission enterprises, and apply the grandfathering rule to high-emission enterprises.