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8篇 您的检索式:作者名="Emwas"
    题名 作者 年代 出处 被引量
1NMR-based metabolomics in human disease diagnosis: applications, limitations, and recommendations 显示文摘Emwas A H M Salek R M Griffin J L 2013Metabolomics2013,9,5:1
2Tungsten Blue Oxide as a Reusable Electrocatalyst for Acidic Water Oxidation by Plasma-Induced Vacancy Engineering显示文摘In contrast to alkaline water electrolysis,acidic water electrolysis remains an elusive goal due to the lack of earth-abundant,efficient,and acid-stable water oxidation electrocatalysts.Here,we show that materials with intrinsically poor electrocatalytic activity can be turned into active electrocatalysts that drive the acidic oxygen evolution reaction(OER)effectively.This development is achieved through ultrafast plasma sputtering,which introduces abundant oxygen vacancies that reconstruct the surface electronic structures,and thus,regulated the surface interactions of electrocatalysts and the OER intermediates.Using tungsten oxide(WO_(3))as an example,we present a broad spectrum of theoretical and experimental characterizations that show an improved energetics of OER originating from surface oxygen vacancies and resulting in a significantly boosted OER performance,compared with pristine WO_(3).Our result suggests the efficacy of using defect chemistry to modify electronic properties and hence to improve the OER performance of known materials with poor activity,providing a new direction for the discovery of acid-stable OER catalysts.Hanfeng Liang Zhen Cao Chuan Xia Fangwang Ming Wenli Zhang Abdul-Hamid Emwas Luigi Cavallo Husam N.Alshareef 2021CCS Chemistry2021,3,3:1
3NMR-basedmetabolomics in human disease diagnosis: applications,limitations,and recommendations显示文摘Emwas A-H M Salek RM Griffin JL 2013Metabolomics2013,9,5:1
4The strengths and weaknesses of NMR spec- troscopy and mass spectrometry with particular focus on metabolomics research显示文摘Emwas AH 2015Methods Mol Biol2015,1277,:1
5Utilizing NMR and EPR spectroscopy to probe the role of copper in prion diseases显示文摘Abdul‐Hamid M. Emwas Zeyad A. Al‐Talla Xianrong Guo Suliman Al‐Ghamdi Harbi T. Al‐Masri 2013Magn Reson Chem2013,,5:1
6NMR-based metabolomics in human disease diagnosis applications limitations and recommendations显示文摘Emwas AHM Salek RM Griffin JL 2013Metabolomics2013,9,5:1
7Nitrogen Reduction to Ammonia by a Phosphorus-Nitrogen PN^(3) P-Mo(V)Nitride Complex:Significant Enhancement via Ligand Postmodification显示文摘Efforts to develop organometallic complexes for catalytic nitrogen reduction have seen significant progress in recent years.However,the strategies for improving the activity of the homogenous catalysts have mainly focused on alternating ligands and metals.Herein,we report that the activity and stability of a PN_(P-Mo pincer complex(2)toward dinitrogen(N_(2))reduction were greatly enhanced through postmodification of the PN^(3)P pincer framework of its parent complex(1).A high ratio of NH_(3)/Mo(3525)was achieved in the presence of SmI_(2)as a reductant.In sharp contrast,1 only afforded an NH_(3)/Mo ratio of 21.Moreover,when supported by an anionic pincer ligand,2 furnished a high oxidation state Mo(V)-nitride complex via N_(2)cleavage as a plausible key intermediate in the catalytic process,suggesting a catalytic cycle that may involve different oxidation states(Ⅱ/Ⅴ)from those with 10-πelectron configuration in the literature.Delong Han Priyanka Chakraborty Mei-Hui Huang Li Yang Hao Huang Théo P.Gonçalves Abdul Hamid Emwas Zhiping Lai Jr-Hau He Aleksander Shkurenko Mohamed Eddaoudi Kuo-Wei Huang 2023CCS Chemistry2023,5,3:0
8Mechanistic elucidation of the role of metal oxidation states in nickel mediated electrocatalytic coupling of benzyl halides显示文摘We present the mechanistic understanding of an electrochemically-driven nickel-catalyzed coupling reaction.Computational analysis reveals that the spin density is mostly residing on the nickel(Ni)center when Ni^(II) is reduced to NiI.Ni-mediated halogen atom abstraction through outer-sphere electron-transfer pathway to yield coupling products under mild conditions is demonstrated.Importantly,we have elucidated the role of Ni^(I) and Ni^(0) for successive coupling of benzyl bromide and benzyl chloride derivatives,respectively,to corresponding bibenzyl products.The Ni-catalyst bearing a PN^(3) P-ligand is an effective catalyst,producing a strong ligand effect on the reactivity and selectivity for the homocoupling reactions.Pradip K.Das Priyanka Chakraborty Sandeep Suryabhan Gholap Theo P.Gonçalves Changguang Yao Huaifeng Li Zhiping Lai Abdul-Hamid Emwas Kuo-Wei Huang 2020Green Synthesis and Catalysis2020,1,2:0
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