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231 results on '"Gong, Feng"'

3. Urea Synthesis from N2and CO2over Dual-Atom Catalysts: A High-Throughput Computational Insight

Author

Liu, Chaozhen, Gong, Feng, Zhou, Qiang, and Xie, Yunlong

Abstract

The simultaneous electrocatalytic conversion of N2and CO2into value-added urea is a promising approach to utilizing CO2as a feedstock for the sustainable production of chemicals. Designing cost-effective electrocatalysts for simultaneous activation of N2and CO2on distinct active sites is challenging due to the inertness of N2and the competing reduction of CO2to other products. To address this, we systematically designed various dual-atom anchored on two-dimensional C2N and found that the presence of dual metal atoms on the C2N generates excess surface-charge density, favoring the activation of CO2and N2. The screening results demonstrate that ReV@C2N is the optimal candidate for driving the urea synthesis, as it facilitates stable binding of both N2and CO2. This could be attributed to the presence of dual metal atoms on C2N, which generate excess surface-charge density that favors the activation of CO2and N2. In addition, we have thoroughly investigated the C–N coupling process. This observation can be explained by the spontaneous coupling of the obtained CO moiety into the activated N–N bond to form NCON, which is driven by the thermodynamic driving force and orbital overlap of the adsorbed N2and CO.

Published
2024
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9. A Facile Strategy for Multiplex Protein Detection by a Fluorescent Microsphere-Based Digital Immunoassay

Author

Gong, Feng, Tan, Zhiyou, Shan, Xiaoyun, Yang, Yixia, Tian, Songbai, Zhou, Fuxiang, Ji, Xinghu, and He, Zhike

Abstract

The digital immunoassay is a highly sensitive detection technique based on single-molecule counting and is widely used in the ultrasensitive detection of biomarkers. Herein, we developed a fluorescent microsphere-based digital immunoassay (FMDIA) by employing fluorescent microspheres as both the carriers for immunoreaction and fluorescent reports for imaging. In this approach, the target protein in the sample was captured by fluorescent microspheres to form a biotin-labeled sandwich immunocomplex, and then, the fluorescent microspheres containing the target protein molecules were captured by adding streptavidin-coated magnetic beads (SA-MBs). By counting the proportion of fluorescence-positive magnetic beads, the concentration of the target protein can be precisely quantified. As a proof of concept, α fetoprotein (AFP) and human interleukin-6 (IL-6) were used to assess the analytical performance of the proposed FMDIA, and limit of detection (LOD) values of 21 pg/mL (0.30 pM) and 0.19 pg/mL (7.3 fM) were achieved, respectively. The results of AFP detection in serum samples of patients and healthy people were consistent with the reference values given by the hospital. Furthermore, by adding fluorescent microspheres of various colors for encoding, the proposed FMDIA can easily realize the simultaneous detection of multiple proteins without the need to introduce multiple modified magnetic beads. This multiplex protein detection strategy, in which the reactions are first carried out on the fluorescent microspheres and then magnetic beads are used to capture the fluorescent reporters containing the target molecules, provides a new idea for digital assays.

Published
2024
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10. Heterometallic Electrocatalysts Derived from High-Nuclearity Metal Clusters for Efficient Overall Water Splitting

Author

Pan, Fu-Chun, Jia, Jun, Gong, Feng, Liu, Yonghui, Liu, Shude, Jun, Seong Chan, Lin, Dunmin, Guo, Yuzheng, Yamauchi, Yusuke, and Huo, Yu

Abstract

The development of cost-effective electrocatalysts with an optimal surface affinity for intermediates is essential for sustainable hydrogen fuel production, but this remains insufficient. Here we synthesize Ni2P/MoS2-CoMo2S4@C heterometallic electrocatalysts based on the high-nuclearity cluster {Co24(TC4A)6(MoO4)8Cl6}, in which Ni2P nanoparticles were anchored to the surface of the MoS2-CoMo2S4@C nanosheets via strong interfacial interactions. Theoretical calculations revealed that the introduction of Ni2P phases induces significant disturbances in the surface electronic configuration of Ni2P/MoS2-CoMo2S4@C, resulting in more relaxed d–d orbital electron transfers between the metal atoms. Moreover, continuous electron transport was established by the formation of multiple heterojunction interfaces. The optimized Ni2P/MoS2-CoMo2S4@C electrocatalyst exhibited ultralow overpotentials of 198 and 73 mV for oxygen and hydrogen evolution reactions, respectively, in alkaline media, at 10 mA cm–2. The alkali electrolyzer constructed using Ni2P/MoS2-CoMo2S4@C required a cell voltage of only 1.45 V (10 mA cm–2) to drive overall water splitting with excellent long-term stability.

Published
2024
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11. The risk of concurrent malignancies in patients with multiple endocrine neoplasia type 1: insights into clinical characteristics of those with multiple endocrine neoplasia type 1

Author

Zhao, Yu xing, Wang, Ou, Song, An, Wang, Lin jie, Gong, Feng ying, Duan, Lian, Yang, Hong bo, Pan, Hui, and Zhu, Hui juan

Abstract

Objective: Summarize and analyze the characteristics of patients with Multiple Endocrine Neoplasia type 1 (MEN-1) who were diagnosed with malignant tumors that do not belong to MEN-1 components. Methods: Clinical data from patients with MEN-1 who visited Peking Union Medical College Hospital between April 2012 and April 2022 were collected. We compared the clinical characteristics of patients with malignant tumors outside of their MEN-1 components to those without additional tumors. MEN-1 gene testing was performed on most of these patients using Sanger sequencing, whole-exome sequencing, or MLPA. Results: A total of 221 MEN-1 patients were diagnosed, of which 23 (10.40%) were found to have malignant tumors that did not belong to MEN-1 components, including papillary thyroid carcinoma (PTC) (4.52%), breast cancer (1.81%), urologic neoplasms (1.35%), primary hepatic carcinoma (PCC) (0.09%), meningeal sarcoma (0.05%), glioblastoma (0.05%), cervical cancer (0.05%), and lung carcinoma (0.05%). MEN-1 gene mutations were identified in 11 patients, including missense mutations, frameshift mutations, and splice mutations. The prevalence of each endocrine neoplasm, particularly gastroenteropancreatic neuroendocrine tumor, was higher in MEN-1 patients with other malignant tumors compared to MEN-1 patients without malignant tumors. Conclusion: Our retrospective study revealed a higher incidence of non-MEN-1 component malignant tumors in MEN-1 patients, especially breast cancer, PTC, and urologic neoplasms. These patients also exhibit more severe clinical phenotypes of MEN-1.

Published
2024
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14. Diamond turning and full-frequency band error measurement methods for x-ray focusing mirror molds

Author

Zhang, Xuejun, Wang, Xiaoyong, Dai, Yifan, Kong, Lingbao, Zhang, Dawei, Gong, Feng, Li, Lihua, Wu, Kaiji, Bao, Xingyu, Ding, Fei, Qiao, Zheng, Chen, Zhigao, Li, Duo, Liu, Yutao, Xue, Jiadai, Wang, Wei, Li, Yanting, Wang, Jinliang, Liao, Qiuyan, Jin, Yuan, Wu, Yangong, Zhang, Niandong, Ji, Peng, Li, Guo, Li, Yuhao, Chai, Wensong, Yang, Yanji, and Wang, Bo

Published
2023
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28. Night vision measuring instrument

Author

Zhang, Xuejun, Wang, Xiaoyong, Dai, Yifan, Kong, Lingbao, Zhang, Dawei, Gong, Feng, Li, Lihua, Li, Zexuan, Wang, Jiapeng, Jin, Shangzhong, Zhan, Chunlian, and Wu, Kexuan

Published
2023
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