Results 311 to 320 of about 1,342,984 (345)

On the Redox Mechanism of Low-Temperature NH3-SCR over Cu-CHA: A Combined Experimental and Theoretical Study of the Reduction Half Cycle.

Angewandte Chemie, 2021
Cu-CHA is the state-of-the-art catalyst for the selective catalytic reduction (SCR) of NOx in vehicle applications. Although extensively studied, diverse mechanistic proposals still stand in terms of e.g., nature of active Cu-ions and reaction pathways ...
Wenshuo Hu, T. Selleri, Federica Gramigni, E. Fenes, K. Rout, Shaojun Liu, I. Nova, De Chen, Xiang Gao, E. Tronconi   +9 more
semanticscholar   +1 more source

Dual CHA-mediated high-efficient formation of a tripedal DNA walker for constructing a novel proteinase-free dual-mode biosensing strategy.

Biosensors & bioelectronics, 2021
DNA walkers have been recognized as a type of powerful signal amplification tool for biosensors, but how to adopt a proper strategy to increase their amplification efficiency is still highly desirable.
Wan-Min Huang, Danyan Zhan, Yiming Xie, Xin Li, Guosong Lai   +4 more
semanticscholar   +1 more source

Transient Kinetic Analysis of Low-Temperature NH3-SCR over Cu-CHA Catalysts Reveals a Quadratic Dependence of Cu Reduction Rates on CuII

, 2021
We combine gas phase Transient Response Methods with Transient Kinetic Analysis to investigate the reduction half-cycle (RHC: CuII → CuI) of the Standard SCR redox mechanism over Cu-CHA (chabazite)...
Federica Gramigni, N. D. Nasello, N. Usberti, U. Iacobone, T. Selleri, Wenshuo Hu, Shaojun Liu, Xiang Gao, I. Nova, E. Tronconi   +9 more
semanticscholar   +1 more source

Isolated Indium-hydrides in CHA Zeolites: Speciation and Catalysis for Non-oxidative Dehydrogenation of Ethane.

Journal of the American Chemical Society, 2020
Study of the formation, characterization, and functionality of isolated surface hydrides on solid materials is a formidable task because of the complexity of solid surfaces and the difficulty of analyzing structure in solids.
Z. Maeno, Shunsaku Yasumura, Xiaopeng Wu, M. Huang, Chong Liu, Takashi Toyao, K. Shimizu   +6 more
semanticscholar   +1 more source

A Complete Multisite Reaction Mechanism for Low-Temperature NH3-SCR over Cu-CHA

, 2020
The dynamic character of the active centers has made it difficult to unravel the reaction path for NH3-assisted selective catalytic reduction (SCR) of nitrogen oxides over Cu-CHA.
Lin Chen, T. Janssens, Peter N. R. Vennestrøm, J. Jansson, M. Skoglundh, H. Grönbeck   +5 more
semanticscholar   +1 more source

The Role of H+- and Cu+-Sites for N2O Formation during NH3-SCR over Cu-CHA

, 2021
The mechanism for N2O formation over CHA and Cu-CHA zeolite catalysts during NH3-SCR is investigated using density functional theory calculations.
Yingxin Feng, T. Janssens, Peter N. R. Vennestrøm, J. Jansson, M. Skoglundh, H. Grönbeck   +5 more
semanticscholar   +1 more source

Ratiometric CRISPR/Cas12a-Triggered CHA System Coupling with the MSRE to Detect Site-Specific DNA Methylation.

ACS Sensors
The precise determination of DNA methylation at specific sites is critical for the timely detection of cancer, as DNA methylation is closely associated with the initiation and progression of cancer.
L. Ding, Shengnan Cao, Chenling Qu, Yongjun Wu, Songcheng Yu   +4 more
semanticscholar   +1 more source

Importance of controllable Al sites in CHA framework by crystallization pathways for NH3-SCR reaction

, 2020
As a commerical catalyst of high silica CHA zeolite for NH3-SCR reaction, controllable Al sites in CHA framework for improving catalytic performance are rarely reported.
Juan Zhang, Yulong Shan, Ling Zhang, Jinpeng Du, Hong He, Shichao Han, Chi Lei, Sen Wang, W. Fan, Zhaochi Feng, Xiaolong Liu, Xiangju Meng, F. Xiao   +12 more
semanticscholar   +1 more source

Seeded synthesis of all-silica CHA zeolites in diluted mother liquor

, 2021
Owing to their valuable structural characteristics, CHA-type zeolites have great potential for applications in catalysis, adsorption and membrane separation.
X. Kong, Heng'e Qiu, Ye Zhang, Xiaoxue Tang, Danni Meng, Senlin Yang, Wanying Guo, Ning Xu, Lin Kong, Yanfeng Zhang, Zefang Zhang   +10 more
semanticscholar   +1 more source

The sorption behavior of CHA-type zeolite for removing radioactive strontium from aqueous solutions

, 2020
The highly efficient removal of radioactive metal ions (e.g. 137Cs, 90Sr) remains a challenge from the standpoint of environmental protection and public health. Although adsorption has been proven to be an effective and economical technology to eliminate
Jie Liang, Jiangbo Li, Xin Li, Kaili Liu, Liu Wu, G. Shan   +5 more
semanticscholar   +1 more source