Green hydrogen production via photocatalytic water splitting using semiconductor catalysts is a critical step toward global carbon neutrality. However, the practical application of organic semiconductors is limited by...
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Green hydrogen production via photocatalytic water splitting using semiconductor catalysts is a critical step toward global carbon neutrality. However, the practical application of organic semiconductors is limited by a rapid decline in catalytic activity, mainly due to unstable molecular structure and photo-corrosion. In this study, two titanium-coordinated perylene diimide catalysts (TiF-PDI and TiC-PDI) were synthesized via a wet chemical approach. Under near-atmospheric conditions with 1 wt% Pt as a co-catalyst, these catalysts demonstrated hydrogen evolution reaction (HER) activities of 584 and 510 μmol·g −1 ·h −1 , respectively, achieving a 7- to 8-fold improvement over carboxyl perylene diimide (H 2 PDI). Particularly, TiF-PDI retained approximately 80 % of its initial catalytic activity after 500 h of continuous illumination at room temperature and near atmospheric pressure, demonstrating the best long-term HER stability reported to date for perylene-based semiconductors. The introduction of Ti 4+ ions facilitated charge-carrier separation and transfer, while F − ions played a vital role in enhancing system polarization, stabilizing photogenerated excitons, and mitigating Ti 4+ ions leaching by intercalating into the molecular lattice. This synergistic regulatory activity of these two ions improved both the photocatalytic performance and durability of TiF-PDI. This study provides valuable insights into structural modification and charge stabilization strategies to design high-performance and long-lived photocatalysts for sustainable energy applications.
Highly productive dairy cow' ration under intensive production conditions causes the development of subacute rumen acidosis (SARA). In this paper we discuss a reticulo-ruminal long-acting cyber-physical diagnostic...
ISBN:
(数字)9781728169491
ISBN:
(纸本)9781728169507
Highly productive dairy cow' ration under intensive production conditions causes the development of subacute rumen acidosis (SARA). In this paper we discuss a reticulo-ruminal long-acting cyber-physical diagnostic system' prototype, which applies Internet of Things (IoT) for monitoring rumen parameters of cows. The new diagnostic system architecture includes, reticulo-ruminal bolus with pH and temperature sensors, a microcontroller, a radio transmitter and a power supply module. The system includes gateways for data collection from boluses, an MQTT (Message Queuing Telemetry Transport) broker, a web server and a database. The diagnostic system' prototype provides timely data on cow health status to the users, so they can evaluate the cow' health status and implement further actions. Therefore, the use of diagnostic system provides opportunity to increase cow productivity, longevity and to save maintenance cost of milk farms. The results of the first stage of the research are discussed in this paper.
The Extra Robotic Legs (XRL) system is a robotic augmentation worn by a human operator consisting of two articulated robot legs that walk with the operator and help bear a heavy backpack payload. It is desirable for t...
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Social navigation datasets are necessary to assess social navigation algorithms and train machine learning algorithms. Most of the currently available datasets target pedestrians’ movements as a pattern to be replica...
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Electromagnetic tracking, as a non-contacting and occlusion-free localization method, has been widely used to track various intracorporeal medical devices and robots in minimally invasive medicine. Although it is well...
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Local planning is one of the key technologies for mobile robots to achieve full autonomy and has been widely investigated. To evaluate mobile robot local planning approaches in a unified and comprehensive way, a mobil...
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Nonlinear mapping is an essential and common demand in online systems, such as sensor systems and mobile phones. Accelerating nonlinear mapping will directly speed up online systems. Previously the authors of this pap...
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Soft robotics aims at creating systems with improved performance of movement and adaptability in unknown, challenging, environments and with higher level of safety during interactions with humans. This Roadmap on Soft...
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