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209. Recent Developments of Atomically Dispersed Metal Electrocatalysts for Oxygen Reduction Reaction†.

Author

Pang, Ruoyu, Xia, Hongyin, Li, Jing, Guo, Shaojun, and Wang, Erkang

Subjects
OXYGEN reduction, METALS, ENERGY conversion, MATERIALS science, COOPERATIVE binding (Biochemistry)
Abstract

Comprehensive Summary: Oxygen reduction reaction (ORR) is the pivotal portion in many electrochemical energy conversion and storage technologies. However, the complex mechanisms and sluggish kinetics of ORR have also become one of the key issues hindering the development and application of these technologies. Recently, single‐atom catalysts (SACs) with well‐defined atomic active centers and theoretical 100% atomic utilization have attracted broad interests in the area of electrocatalytic ORR. The electrocatalytic ORR performance of SACs is fundamentally determined by the intrinsic activity of the single‐atom active site and increasing the number of active sites involved in the ORR can further enhance the ORR activity of SACs. In this review, advances in atomically dispersed metal electrocatalysts for ORR in the last three years are summarized. Three main regulation strategies for achieving SACs with excellent intrinsic activity in the context of the ORR mechanism are involved including modulation of coordination environments, the construction of intrinsic defects, and the introduction of dual active sites. Moreover, discussions on improving the loading and utilization of active sites are given. Finally, the current challenges and opportunities for the development of SACs for ORR are presented. [ABSTRACT FROM AUTHOR]

Published
2023
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212. Janus‐like B x C/C Quantum Sheets with Z‐Scheme Mechanism Strengthen Tumor Photothermal‐Immunotherapy in NIR‐II Biowindow

Author

Lu, Shi‐Yu, primary, Wang, Jingjing, additional, Wang, Xingyue, additional, Yang, Wenting, additional, Jin, Meng, additional, Xu, Luen, additional, Yang, Huawei, additional, Ge, Xiaoxiao, additional, Shang, Changshuai, additional, Chao, Yuguang, additional, Zhou, Lei, additional, Yin, Kun, additional, Zhang, Qinghua, additional, Gu, Lin, additional, Cao, Yang, additional, Ran, Haitao, additional, Guo, Shaojun, additional, and Liu, Hui, additional

Published
2022
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213. Observation of Thermalization and Information Scrambling in a Superconducting Quantum Processor

Author

Zhu, Qingling, primary, Sun, Zheng-Hang, additional, Gong, Ming, additional, Chen, Fusheng, additional, Zhang, Yu-Ran, additional, Wu, Yulin, additional, Ye, Yangsen, additional, Zha, Chen, additional, Li, Shaowei, additional, Guo, Shaojun, additional, Qian, Haoran, additional, Huang, He-Liang, additional, Yu, Jiale, additional, Deng, Hui, additional, Rong, Hao, additional, Lin, Jin, additional, Xu, Yu, additional, Sun, Lihua, additional, Guo, Cheng, additional, Li, Na, additional, Liang, Futian, additional, Peng, Cheng-Zhi, additional, Fan, Heng, additional, Zhu, Xiaobo, additional, and Pan, Jian-Wei, additional

Published
2022
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218. A stroll through a 62 qubit quantum processor

Author

Munro, William J., primary, Gong, Ming, additional, Wang, Shiyu, additional, Zha, Chen, additional, Chen, Ming-Cheng, additional, Huang, He-Liang, additional, Wu, Yulin, additional, Zhu, Qingling, additional, Zhao, Youwei, additional, Li, Shaowei, additional, Guo, Shaojun, additional, Qian, Haoran, additional, Ye, Yangsen, additional, Chen, Fusheng, additional, Ying, Chong, additional, Yu, Jiale, additional, Fan, Daojin, additional, Wu, Dachao, additional, Su, Hong, additional, Deng, Hui, additional, Rong, Hao, additional, Zhang, Kaili, additional, Cao, Sirui, additional, Lin, Jin, additional, Xu, Yu, additional, Sun, Lihua, additional, Guo, Cheng, additional, Li, Na, additional, Liang, Futian, additional, Bastidas, Victor, additional, Nemoto, Kae, additional, Huo, Yong-Heng, additional, Lu, Chao-Yang, additional, Peng, Cheng-Zhi, additional, Zhu, Xiaobo, additional, and Pan, Jian-Wei, additional

Published
2022
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220. Optimum design of both linear and planar sparse arrays with sidelobe level reduction using salp swarm algorithm

Author

Liu Feng, Luo Zailei, Shen Tongsheng, Guo Shaojun, and Zhibin Zou

Subjects
010302 applied physics, Computer science, General Physics and Astronomy, ComputerApplications_COMPUTERSINOTHERSYSTEMS, 020206 networking & telecommunications, 02 engineering and technology, 01 natural sciences, Swarm intelligence, Sonar, Electronic, Optical and Magnetic Materials, law.invention, Computer Science::Robotics, Reduction (complexity), Computer Science::Graphics, Planar, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Salp swarm algorithm, Satellite, Electrical and Electronic Engineering, Radar, Algorithm, Physics::Atmospheric and Oceanic Physics
Abstract

Sparse arrays play an important role in the widely used acoustic and electromagnetic applications such as sonar, radar, and satellite. In this paper, a recently proposed swarm intelligence algorith...

Published
2020

221. Gel-Casting Prepared Porous Si3N4 Ceramics with Different Contents of Y2O3 and Al2O3 Additives

Author

Zhou Xiaosong, Zou Chunrong, Shen Tongsheng, Li Song, Chunlei Yan, and Guo Shaojun

Subjects
010302 applied physics, Materials science, Mechanical Engineering, 02 engineering and technology, Dielectric, 021001 nanoscience & nanotechnology, Microstructure, 01 natural sciences, Flexural strength, Chemical engineering, Mechanics of Materials, visual_art, Phase (matter), 0103 physical sciences, visual_art.visual_art_medium, Slurry, General Materials Science, Ceramic, 0210 nano-technology, Porosity, Elastic modulus
Abstract

Porous Si3N4 ceramics were prepared via a controlled gel-casting process followed by gas pressure sintering with 8 wt.% Y2O3 and Al2O3 additives. The gel-casting parameters including slurry pH value, AM: MBAM ratio, degassing procedure, drying condition and decarbonize process were optimized, and the effects of different Y2O3: Al2O3 ratios on the microstructure and properties of the Si3N4 ceramics were investigated. With an optimized gel-casting process, a high solid loading of 46.5 vol.% was achieved, and as the Y2O3 content decreased from 6 to 1 wt.%, the porosity of Si3N4 ceramics declined from 36.3 to 27.5% while the β-Si3N4 phase content reduced from 38.9 to 15.0%. The bending strength and elastic modulus of the ceramics varied with different Y2O3: Al2O3 ratios and were influenced by the porosity as well as the tailored interlocking structure of elongated β-Si3N4 grains. The Si3N4 ceramics also exhibited low and stable dielectric constants.

Published
2020

222. Finite sample theory for high-dimensional functional/scalar time series with applications

Author

Fang, Qin, Guo, Shaojun, and Qiao, Xinghao

Subjects
Statistics and Probability, FOS: Mathematics, Mathematics - Statistics Theory, HA Statistics, Statistics Theory (math.ST), Statistics, Probability and Uncertainty
Abstract

Statistical analysis of high-dimensional functional times series arises in various applications. Under this scenario, in addition to the intrinsic infinite-dimensionality of functional data, the number of functional variables can grow with the number of serially dependent observations. In this paper, we focus on the theoretical analysis of relevant estimated cross-(auto)covariance terms between two multivariate functional time series or a mixture of multivariate functional and scalar time series beyond the Gaussianity assumption. We introduce a new perspective on dependence by proposing functional cross-spectral stability measure to characterize the effect of dependence on these estimated cross terms, which are essential in the estimates for additive functional linear regressions. With the proposed functional cross-spectral stability measure, we develop useful concentration inequalities for estimated cross-(auto)covariance matrix functions to accommodate more general sub-Gaussian functional linear processes and, furthermore, establish finite sample theory for relevant estimated terms under a commonly adopted functional principal component analysis framework. Using our derived non-asymptotic results, we investigate the convergence properties of the regularized estimates for two additive functional linear regression applications under sparsity assumptions including functional linear lagged regression and partially functional linear regression in the context of high-dimensional functional/scalar time series.

Published
2022

230. Quantum computational advantage via 60-qubit 24-cycle random circuit sampling

Author

Zhu, Qingling, primary, Cao, Sirui, additional, Chen, Fusheng, additional, Chen, Ming-Cheng, additional, Chen, Xiawei, additional, Chung, Tung-Hsun, additional, Deng, Hui, additional, Du, Yajie, additional, Fan, Daojin, additional, Gong, Ming, additional, Guo, Cheng, additional, Guo, Chu, additional, Guo, Shaojun, additional, Han, Lianchen, additional, Hong, Linyin, additional, Huang, He-Liang, additional, Huo, Yong-Heng, additional, Li, Liping, additional, Li, Na, additional, Li, Shaowei, additional, Li, Yuan, additional, Liang, Futian, additional, Lin, Chun, additional, Lin, Jin, additional, Qian, Haoran, additional, Qiao, Dan, additional, Rong, Hao, additional, Su, Hong, additional, Sun, Lihua, additional, Wang, Liangyuan, additional, Wang, Shiyu, additional, Wu, Dachao, additional, Wu, Yulin, additional, Xu, Yu, additional, Yan, Kai, additional, Yang, Weifeng, additional, Yang, Yang, additional, Ye, Yangsen, additional, Yin, Jianghan, additional, Ying, Chong, additional, Yu, Jiale, additional, Zha, Chen, additional, Zhang, Cha, additional, Zhang, Haibin, additional, Zhang, Kaili, additional, Zhang, Yiming, additional, Zhao, Han, additional, Zhao, Youwei, additional, Zhou, Liang, additional, Lu, Chao-Yang, additional, Peng, Cheng-Zhi, additional, Zhu, Xiaobo, additional, and Pan, Jian-Wei, additional

Published
2022
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231. Realization of Fast All-Microwave Controlled-Z Gates with a Tunable Coupler

Author

Li, Shaowei, primary, Fan, Daojin, additional, Gong, Ming, additional, Ye, Yangsen, additional, Chen, Xiawei, additional, Wu, Yulin, additional, Guan, Huijie, additional, Deng, Hui, additional, Rong, Hao, additional, Huang, He-Liang, additional, Zha, Chen, additional, Yan, Kai, additional, Guo, Shaojun, additional, Qian, Haoran, additional, Zhang, Haibin, additional, Chen, Fusheng, additional, Zhu, Qingling, additional, Zhao, Youwei, additional, Wang, Shiyu, additional, Ying, Chong, additional, Cao, Sirui, additional, Yu, Jiale, additional, Liang, Futian, additional, Xu, Yu, additional, Lin, Jin, additional, Guo, Cheng, additional, Sun, Lihua, additional, Li, Na, additional, Han, Lianchen, additional, Peng, Cheng-Zhi, additional, Zhu, Xiaobo, additional, and Pan, Jian-Wei, additional

Published
2022
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232. Floquet prethermal phase protected by U(1) symmetry on a superconducting quantum processor

Author

Ying, Chong, primary, Guo, Qihao, additional, Li, Shaowei, additional, Gong, Ming, additional, Deng, Xiu-Hao, additional, Chen, Fusheng, additional, Zha, Chen, additional, Ye, Yangsen, additional, Wang, Can, additional, Zhu, Qingling, additional, Wang, Shiyu, additional, Zhao, Youwei, additional, Qian, Haoran, additional, Guo, Shaojun, additional, Wu, Yulin, additional, Rong, Hao, additional, Deng, Hui, additional, Liang, Futian, additional, Lin, Jin, additional, Xu, Yu, additional, Peng, Cheng-Zhi, additional, Lu, Chao-Yang, additional, Yin, Zhang-Qi, additional, Zhu, Xiaobo, additional, and Pan, Jian-Wei, additional

Published
2022
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249. Cr‐Doped Pd Metallene Endows a Practical Formaldehyde Sensor New Limit and High Selectivity

Author

Zhang, Jingxian, primary, Lv, Fan, additional, Li, Zehui, additional, Jiang, Guangya, additional, Tan, Meijuan, additional, Yuan, Menglei, additional, Zhang, Qinghua, additional, Cao, Youpeng, additional, Zheng, Haoyun, additional, Zhang, Lingling, additional, Tang, Cheng, additional, Fu, Wangyang, additional, Liu, Can, additional, Liu, Kaihui, additional, Gu, Lin, additional, Jiang, Jingkun, additional, Zhang, Guangjin, additional, and Guo, Shaojun, additional

Published
2021
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250. Achieving High‐Performance 3D K + ‐Pre‐intercalated Ti 3 C 2 TxMXene for Potassium‐Ion Hybrid Capacitors via Regulating Electrolyte Solvation Structure

Author

Zhao, Shuoqing, primary, Liu, Zhichao, additional, Xie, Guanshun, additional, Guo, Xin, additional, Guo, Ziqi, additional, Song, Fei, additional, Li, Guohao, additional, Chen, Chi, additional, Xie, Xiuqiang, additional, Zhang, Nan, additional, Sun, Bing, additional, Guo, Shaojun, additional, and Wang, Guoxiu, additional

Published
2021
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