The product presentation videos on E-commerce platforms have a significant influence on consumers' purchase decisions, and enterprises have focused on choosing the type of product presentation videos. Based on the resource matching theory, mental imagery theory and cue utilization theory, this study investigated the influence of product presentation videos type (product appearance video vs. product usage video) on consumers' purchase intention and the moderating effect of product rating (low vs. high). Through three pre-experiments and two formal experiments, the results showed that the product usage video has a stronger effect on consumers' purchase intention more than the product appearance video, which is mediated by perceived diagnosticity and mental imagery. In addition, product rating moderated the influence of product presentation videos type on consumers' purchase intention. The product usage video would improve consumers' purchase intention more than the product appearance video when the product rating is high; however, there is no significant difference in the impact of two types of videos on consumers' purchase intention when the product rating is low. This study supplements the research on product presentation videos and provides a reference for online retailers to select effective product presentation videos.
The rational design of multiphasic interfaces is an efficient way to fabricate favorable catalysts for bifunctional oxygen reduction and oxygen evolution reactions (ORR/OER). Herein, the hybrid metallic nanoparticles composed of Co, CoO, and Cedoped WO 3 are anchored on the external surface of the preprepared catalysts (PZF-2-700) by pyrolyzing a unique polyoxometalate (POM)-containing metal−organic framework (MOF) precursor. The multiple heterointerfaces in the PZF-2-700 material surface provide defects as the catalytic active sites for the OER. Besides, the Co and CoO with Co−N−C, N−C, and Co−O in PZF-2-700 afford efficient catalytic performance for the ORR. Furthermore, the strong built-in field of PZF-2-700 enables the heterointerfaces with opposite charges and facilitates the electron transfer capacity throughout the structure. Based on this, the produced PZF-2-700 exhibits a small potential gap of 679 mV between the ORR and the OER. The homemade zinc−air battery (ZAB) with PZF-2-700 as the cathode catalyst displays a power density of 146.9 mW cm −2 and a charge/discharge cycling stability for 311 h with a charge−discharge period of 10 min, which offers a promising cathode catalyst for environment-friendly ZABs.
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