Citation:
Runze Liu, Yankai Bian, Weili Dai. Qualitative and quantitative analysis of Brønsted and Lewis acid sites in zeolites: A combined probe-assisted 1H MAS NMR and NH3-TPD investigation[J]. Chinese Journal of Structural Chemistry,
;2024, 43(4): 100250.
doi:
10.1016/j.cjsc.2024.100250
-
Zeolite is one of the most important heterogeneous catalysts in acid catalytic reactions. Considering that the catalytic behaviors of zeolites are mostly related to their acidic characteristics, extensive attention has been attracted to the measurements of acid type, strength and concentration in zeolites. Numerous techniques including Fourier-transform infrared (FTIR) spectroscopy, probe-assisted 1H, 13C and 31P magic angle spinning nuclear magnetic resonance spectroscopy (MAS NMR) as well as temperature programmed desorption of ammonia (NH3-TPD) have been developed for determining the acid sites. Nevertheless, a single approach is defective to characterize the acid sites comprehensively. Herein, combining the probe-assisted (e.g., NH3 and CD3CN) 1H MAS NMR and NH3-TPD, the acid sites in different zeolites including the acid type, density and strength were determined. The commonly utilized NH3-TPD to determine the acid strength of zeolite samples with different topologies should be rigorously considered owing to zeolite confinement effect. Controlling the desorption temperature of NH3 probe molecules, the acid type (i.e., Brønsted acid sites (BAS) and Lewis acid sites (LAS)) and the corresponding density could be determined by NH3 probe-assisted 1H MAS NMR spectroscopy, while the acid strength could be investigated via CD3CN probe-assisted 1H MAS NMR spectroscopy.
-
Keywords:
- 1H MAS NMR,
- NH3-TPD,
- Brønsted acid sites,
- Lewis acid sites,
- Zeolites
-
-
-
-
[1]
Huimin Luan , Qinming Wu , Jianping Wu , Xiangju Meng , Feng-Shou Xiao . Templates for the synthesis of zeolites. Chinese Journal of Structural Chemistry, 2024, 43(4): 100252-100252. doi: 10.1016/j.cjsc.2024.100252
-
[2]
Jiajun Lu , Zhehui Liao , Tongxiang Cao , Shifa Zhu . Synergistic Brønsted/Lewis acid catalyzed atroposelective synthesis of aryl-β-naphthol. Chinese Chemical Letters, 2025, 36(1): 109842-. doi: 10.1016/j.cclet.2024.109842
-
[3]
Ling-Hao Zhao , Hai-Wei Yan , Jian-Shuang Jiang , Xu Zhang , Xiang Yuan , Ya-Nan Yang , Pei-Cheng Zhang . Effective assignment of positional isomers in dimeric shikonin and its analogs by 1H NMR spectroscopy. Chinese Chemical Letters, 2024, 35(5): 108863-. doi: 10.1016/j.cclet.2023.108863
-
[4]
Yu Xiong , Li-Jun Hu , Jian-Guo Song , Di Zhang , Yi-Shuang Peng , Xiao-Jun Huang , Jian Hong , Bin Zhu , Wen-Cai Ye , Ying Wang . Structure elucidation of plumerubradins A–C: Correlations between 1H NMR signal patterns and structural information of [2+2]-type cyclobutane derivatives. Chinese Chemical Letters, 2025, 36(5): 110149-. doi: 10.1016/j.cclet.2024.110149
-
[5]
Yongheng Ren , Yang Chen , Hongwei Chen , Lu Zhang , Jiangfeng Yang , Qi Shi , Lin-Bing Sun , Jinping Li , Libo Li . Electrostatically driven kinetic Inverse CO2/C2H2 separation in LTA-type zeolites. Chinese Journal of Structural Chemistry, 2024, 43(10): 100394-100394. doi: 10.1016/j.cjsc.2024.100394
-
[6]
Zhenfei Tang , Yunwu Zhang , Zhiyuan Yang , Haifeng Yuan , Tong Wu , Yue Li , Guixiang Zhang , Xingzhi Wang , Bin Chang , Dehui Sun , Hong Liu , Lili Zhao , Weijia Zhou . Iron-doping regulated light absorption and active sites in LiTaO3 single crystal for photocatalytic nitrogen reduction. Chinese Chemical Letters, 2025, 36(3): 110107-. doi: 10.1016/j.cclet.2024.110107
-
[7]
Wen-Tao Ouyang , Jun Jiang , Yan-Fang Jiang , Ting Li , Yuan-Yuan Liu , Hong-Tao Ji , Li-Juan Ou , Wei-Min He . Sono-photocatalytic amination of quinoxalin-2(1H)-ones with aliphatic amines. Chinese Chemical Letters, 2024, 35(10): 110038-. doi: 10.1016/j.cclet.2024.110038
-
[8]
Zhenchun Yang , Bixiao Guo , Zhenyu Hu , Kun Wang , Jiahao Cui , Lina Li , Chun Hu , Yubao Zhao . Molecular engineering towards dual surface local polarization sites on poly(heptazine imide) framework for boosting H2O2 photo-production. Chinese Chemical Letters, 2024, 35(8): 109251-. doi: 10.1016/j.cclet.2023.109251
-
[9]
Yuhang Li , Yang Ling , Yanhang Ma . Application of three-dimensional electron diffraction in structure determination of zeolites. Chinese Journal of Structural Chemistry, 2024, 43(4): 100237-100237. doi: 10.1016/j.cjsc.2024.100237
-
[10]
Qinming Wu , Xiangju Meng . New zeolites with extra-stable extra-large-pore. Chinese Journal of Structural Chemistry, 2024, 43(6): 100310-100310. doi: 10.1016/j.cjsc.2024.100310
-
[11]
Jie Ma , Jianxiang Wang , Jianhua Yuan , Xiao Liu , Yun Yang , Fei Yu . The regulating strategy of hierarchical structure and acidity in zeolites and application of gas adsorption: A review. Chinese Chemical Letters, 2024, 35(11): 109693-. doi: 10.1016/j.cclet.2024.109693
-
[12]
Teng-Yu Huang , Junliang Sun , De-Xian Wang , Qi-Qiang Wang . Recent progress in chiral zeolites: Structure, synthesis, characterization and applications. Chinese Chemical Letters, 2024, 35(12): 109758-. doi: 10.1016/j.cclet.2024.109758
-
[13]
Ruiying Liu , Li Zhao , Baishan Liu , Jiayuan Yu , Yujie Wang , Wanqiang Yu , Di Xin , Chaoqiong Fang , Xuchuan Jiang , Riming Hu , Hong Liu , Weijia Zhou . Modulating pollutant adsorption and peroxymonosulfate activation sites on Co3O4@N,O doped-carbon shell for boosting catalytic degradation activity. Chinese Journal of Structural Chemistry, 2024, 43(8): 100332-100332. doi: 10.1016/j.cjsc.2024.100332
-
[14]
Zhen Liu , Zhi-Yuan Ren , Chen Yang , Xiangyi Shao , Li Chen , Xin Li . Asymmetric alkenylation reaction of benzoxazinones with diarylethylenes catalyzed by B(C6F5)3/chiral phosphoric acid. Chinese Chemical Letters, 2024, 35(5): 108939-. doi: 10.1016/j.cclet.2023.108939
-
[15]
Wei-Jia Wang , Kaihong Chen . Molecular-based porous polymers with precise sites for photoreduction of carbon dioxide. Chinese Chemical Letters, 2025, 36(1): 109998-. doi: 10.1016/j.cclet.2024.109998
-
[16]
Shaoqing Du , Xinyong Liu , Xueping Hu , Peng Zhan . Targeting novel sites represents an effective strategy for combating drug resistance. Chinese Chemical Letters, 2025, 36(1): 110378-. doi: 10.1016/j.cclet.2024.110378
-
[17]
Juhong Zhou , Hui Zhao , Ping Han , Ziyue Wang , Yan Zhang , Xiaoxia Mao , Konglin Wu , Shengjue Deng , Wenxiang He , Binbin Jiang . Strategic modulation of CoFe sites for advanced bifunctional oxygen electrocatalyst. Chinese Journal of Structural Chemistry, 2025, 44(1): 100470-100470. doi: 10.1016/j.cjsc.2024.100470
-
[18]
Xuan Liu , Qing Li . Tailoring interatomic active sites for highly selective electrocatalytic biomass conversion reaction. Chinese Chemical Letters, 2025, 36(4): 110670-. doi: 10.1016/j.cclet.2024.110670
-
[19]
Xiao-Ming Chen , Lianhui Song , Jun Pan , Fei Zeng , Yi Xie , Wei Wei , Dong Yi . Visible-light-induced four-component difunctionalization of alkenes to construct phosphorodithioate-containing quinoxalin-2(1H)-ones. Chinese Chemical Letters, 2024, 35(11): 110112-. doi: 10.1016/j.cclet.2024.110112
-
[20]
Zhao Lu , Hu Lv , Qinzhuang Liu , Zhongliao Wang . Modulating NH2 Lewis Basicity in CTF-NH2 through Donor-Acceptor Groups for Optimizing Photocatalytic Water Splitting. Acta Physico-Chimica Sinica, 2024, 40(12): 2405005-. doi: 10.3866/PKU.WHXB202405005
-
[1]
Metrics
- PDF Downloads(0)
- Abstract views(584)
- HTML views(24)