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- 저자 : Ma Zhengguang (검색결과 2 건)
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Zhengguang Ma,Zengqiang Chen,Zhong-Xin Liu 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.6
In this paper, the consensus problems of multiple agents with continuous-time single-integrator dynamicsare studied, where each agent can obtain the position data of its neighboring agents at discrete-time points by usingthe periodic sampling technology and zero-order hold circuit. The smart leader is introduced, which can adjust theinteraction strength between itself and the target point according to the state errors between itself and its neighboringfollowers. The modified leader-following consensus problem is defined as the leader-following consensus problemwhen the smart leader is adopted. Different leader-following consensus protocols are obtained for the multi-agentsystems with or without sampling delays. The theoretical results, which are analysed with Lyapunov stability theory,can decrease the tracking error of the system, especially for the multi-agent systems with disturbance generated byactuator faults. Some simulation examples and real experiments are presented for illustration.
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Ammonia etched petroleum pitch-based porous carbon as efficient catalysts for CO2 electroreduction
Ning Hui,Guo Zhihao,Wang Wenhang,Wang Xiaoshan,Yang Zhongxue,Ma Zhengguang,Tian Yangming,Wu Chenghao,Hao Jian,Wu Mingbo 한국탄소학회 2022 Carbon Letters Vol.32 No.3
Electrochemical reduction of carbon dioxide to valuable chemicals is a promising way of storing renewable energy through electric-to-chemical energy conversion, while its large-scale application is in urgent need of cheap and high-performance catalysts. Herein, we invent a convenient method to synthesize N-doped porous carbon by ammonia etching the pyrolysis carbon of petroleum pitch. We found the ammonia etching treatment not only increase the pyridinic-N content, but also enlarge the specific surface area of the petroleum pitch-based porous carbon. As a cheap and easily available catalyst for carbon dioxide electroreduction, up to 82% of Faradaic efficiency towards carbon monoxide was obtained at − 0.9 V vs the reversible hydrogen electrode in 0.1 M KHCO3. After a long time electrocatalysis of more than 20 h, the Faradaic efficiency of carbon monoxide remains 80%, indicating the porous carbon as made have an ultra-high stability as catalyst for carbon dioxide reduction. Our work provides a new technology to economically prepare efficient electrocatalysts for carbon dioxide reduction.
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