Science Bulletin最新文献_第7页

Visualizing the dynamic evolution of light-sensitive Cu1+/Cu2+ sites during photocatalytic CO2 reduction with an advanced in situ EPR spectroscopy 利用先进的原位EPR光谱技术可视化光催化CO2还原过程中光敏Cu1+/Cu2+位点的动态演变。

IF 18.8 1区综合性期刊

Science Bulletin Pub Date : 2025-04-15 DOI: 10.1016/j.scib.2025.01.047

Qin Ren , Ye He , Yanjuan Sun , Shihan Zhang , Fan Dong

{"title":"Visualizing the dynamic evolution of light-sensitive Cu1+/Cu2+ sites during photocatalytic CO2 reduction with an advanced in situ EPR spectroscopy","authors":"Qin Ren , Ye He , Yanjuan Sun , Shihan Zhang , Fan Dong","doi":"10.1016/j.scib.2025.01.047","DOIUrl":"10.1016/j.scib.2025.01.047","url":null,"abstract":"<div><div>Elucidation of the dynamic evolution of active sites is still a challenge in investigating the catalytic mechanism mainly due to the difficulty in accurately detecting the transient structural changes of active sites under operating conditions. Here, we develop an advanced in situ electron paramagnetic resonance (EPR) spectroscopy, which could sensitively monitor and visualize the dynamic evolution of paramagnetic active sites during photoreduction CO2. In situ results reveal that the photoactivated Cu1+ sites from CuO nanoclusters/TiO2 serve as the authentic active sites in the reaction and exhibit self-regenerative capability. The CO2 molecules can acquire electrons and get activated by the photoactivated Cu1+, leading to the transition of Cu1+ sites into Cu2+ sites. Subsequently, the Cu2+ sites expedite the generation of hydrogen protons through antiferromagnetic coupling with hydroxyl radicals, thereby promoting the production of the final product CH4 via a multi proton-coupled electron transfer (PCET) process. This work reveals and visualizes the dynamic evolution of Cu-based active sites during photocatalytic reactions by combined in situ characterizations, providing new perspectives on the mechanistic understanding of paramagnetic active sites under operation.</div></div>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":"70 7","pages":"Pages 1097-1106"},"PeriodicalIF":18.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143432152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental realization of valley vortex states in water wave crystals 水波晶体中谷涡态的实验实现。

IF 18.8 1区综合性期刊

Science Bulletin Pub Date : 2025-04-15 DOI: 10.1016/j.scib.2025.01.009

Zijian Qin , Qiaolu Chen , Lian Shen , Yihao Yang , Hongsheng Chen , Huaping Wang

引用次数: 0

Pole trajectories of the Λ(1405) help establish its dynamical nature. Λ（1405）的极轨迹有助于确定其动力学性质。

IF 18.8 1区综合性期刊

Science Bulletin Pub Date : 2025-04-15 DOI: 10.1016/j.scib.2025.04.029

Zejian Zhuang, Raquel Molina, Jun-Xu Lu, Li-Sheng Geng

{"title":"Pole trajectories of the Λ(1405) help establish its dynamical nature.","authors":"Zejian Zhuang, Raquel Molina, Jun-Xu Lu, Li-Sheng Geng","doi":"10.1016/j.scib.2025.04.029","DOIUrl":"https://doi.org/10.1016/j.scib.2025.04.029","url":null,"abstract":"The Λ(1405) has been one of the most controversial exotic baryons. If the Λ(1405) possesses a two-pole molecular structure, these poles are expected to evolve differently towards the SU(3) limit. From an analysis of a recent LQCD simulation on the πΣ-K‾N scattering for I=0 and the study of the quark mass dependence of the octet baryon masses, we determine for the first time the trajectories of these poles towards the symmetric point over the Tr[M]=C trajectory accurately. At mπ≃200 MeV, our results are consistent with the lattice simulations, and the extrapolations to the physical point, based on the NLO chiral Lagrangians, agree well with existing experimental analyses. We predict qualitatively similar trajectories at LO and up to NLO, consistent with the LO interaction's dominance. At the SU(3) symmetric point of this trajectory, both poles are on the physical sheet, and the lower pole is located at E(1)=1573(6)(6) MeV, becoming a SU(3) singlet, while the higher pole at E(8a)=1589(7)(5) MeV couples to the octet representation. Moreover, we make predictions in I=1 for the Σ∗ resonance. We find a resonance pole that evolves into a bound state around mπ=415 MeV in this sector. The results presented here are crucial to shed light on the molecular nature of exotic strange baryon resonances and can be tested in future LQCD simulations.","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":" ","pages":""},"PeriodicalIF":18.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143960085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-shot miniaturized spectrometer without lithography. 无光刻的单镜头小型化光谱仪。

IF 18.8 1区综合性期刊

Science Bulletin Pub Date : 2025-04-15 DOI: 10.1016/j.scib.2025.04.032

Lijun Song, Zhimin Zhu, Yixuan Wang, Dunzhao Wei, Jin Liu

引用次数: 0

Full realization of the RIBLL2 separator at the HIRFL-CSR facility RIBLL2分离器在HIRFL-CSR设施的全面实现。

IF 18.8 1区综合性期刊

Science Bulletin Pub Date : 2025-04-15 DOI: 10.1016/j.scib.2025.01.020

Xiao-Dong Xu , Yong Zheng , Zhi-Yu Sun , Yu-Nan Song , Bao-Hua Sun , Satoru Terashima , Chang-Jian Wang , Ge Guo , Guang-Shuai Li , Xiu-Lin Wei , Jun-Yao Xu , Ji-Chao Zhang , Yong Cao , Bing-Shui Gao , Jia-Xing Han , Jin-Rong Liu , Chen-Gui Lu , Shu-Ya Jin , Hooi Jin Ong , Hao-Tian Qi , Li-Hua Zhu

引用次数: 0

Needle-free injection devices for targeted oral delivery of macromolecules 用于大分子靶向口服递送的无针注射装置。

IF 18.8 1区综合性期刊

Science Bulletin Pub Date : 2025-04-15 DOI: 10.1016/j.scib.2025.02.003

Zhonglin Fang, Zhuohao Zhang, Luoran Shang

引用次数: 0

Revolutionizing cerebral monitoring: the innovative leap of ultrasound patch technology and its future horizons 革命性的大脑监测：超声贴片技术的创新飞跃及其未来前景。

IF 18.8 1区综合性期刊

Science Bulletin Pub Date : 2025-04-15 DOI: 10.1016/j.scib.2025.02.002

Yihan Li , Ding Zhao , Lei Xiang, Qinzhe Jiang, Wenguo Cui

引用次数: 0

Bioengineering strategies for augmenting wound-healing efficacy of mesenchymal stem cell-derived extracellular vesicles 增强间充质干细胞衍生细胞外囊泡伤口愈合功效的生物工程策略。