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| 1 | Single-atom heterogeneous catalysts based on distinct carbon nitride scaffolds显示文摘Carbon nitrides integrating macroheterocycles offer unique potential as hosts for stabilizing metal atoms due to their rich electronic structure. To date, only graphitic heptazine-based polymers have been studied.Here, we demonstrate that palladium atoms can be effectively isolated on other carbon nitride scaffolds including linear melem oligomers and poly(triazine/heptazine imides). Increased metal uptake was linked to the larger cavity size and the presence of chloride ions in the polyimide structures. Changing the host structure leads to significant variation in the average oxidation state of the metal, which can be tuned by exchange of the ionic species as evidenced by X-ray photoelectron spectroscopy and supported by density functional theory. Evaluation in the semi-hydrogenation of 2-methyl-3-butyn-2-ol reveals an inverse correlation between the activity and the degree of oxidation of palladium, with oligomers exhibiting the highest activity. These findings provide new mechanistic insights into the influence of the carbon nitride structure on metal stabilization. | Zupeng Chen Evgeniya Vorobyeva Sharon Mitchell Edvin Fako Núria López Sean M.Collins Rowan K.Leary Paul A.Midgley Roland Hauert Javier Pérez-Ramírez | 2018 | National Science Review2018，5，5： | 4 |
| 2 | Study on thermal performance for straw fiber concrete hollow block 显示文摘 | Zhang ZuPeng Zhu ShuiWen Chen GuoPing | 2014 | Advanced Materials Re- search2014，，953954： | 1 |
| 3 | High-yield synthesis and magnetic properties of zinc ferrite single crystal nanocubes in a- queous solution显示文摘 | Chen Zupeng Fang Wenpi Zhang 13o | 2013 | J Alloys Compd2013，550，： | 1 |
| 4 | High-yield synthesis and magnetic properties of zinc ferrite single crystal nanocubes in a- queous solution 显示文摘 | ZuPeng Chen WenQi Fang Bo Zhang | 2013 | Journal of Alloys and Compounds2013，550，： | 1 |
| 5 | Iron-doping Accelerating NADH Oxidation over Carbon Nitride显示文摘As a state-of-the-art conjugated polymer photocatalyst,graphitic carbon nitride(abbreviated as g-C3Na)has shown sreat potential in photocatalvtic cofactor(reduced form of nicotinamide adenine dinucleotide.NADH)regene-ration.Herein,Fe-doped g-CaNa was engineered for photocatalvtic NADH oxidation.The n-r interaction between the NADH molecule and the conjugated heptazine buildine block facilitates the adsorption of NADH onto the framework as revealed by density functional theory(DFT)calculations,Furthermore,iron doping promoted the oxidation kinetics of NADH under blue LED illumination.The conversion ratio of NADH to its oxidized form could be up to 85.7%in 20 min,comparing with 59.4%for metal-free counterpart.Enzyme assay employing formate dehydrogenase(FDH)further verified the selectivity of the products,with 67.5%+2.6%of enzymatically active 1,4-NADH being regenerated following the oxidation process.Scavenger experiments suggest the dominant role of photo-induced electrons in theoxidation of NADH.This work could shed light on developing a novel cofactor regeneration route through the syner-gistic effect between the metal doping and noncovalent interaction based on the coniugated polymer. | ZHANG Yuanyuan HUANG Xiaohua LI Jiashu LIN Gang LIU Wengang CHEN Zupeng LIU Jian | 2020 | Chemical Research in Chinese Universities2020，36，6： | 0 |
| 6 | Selective hydrogenation of 1,3-butadiene on iridium nanostructures:Structure sensitivity, host effect, and deactivation mechanism显示文摘A systematic study on the structure sensitivity,host effect,and the deactivation mechanism of Ircatalyzed selective hydrogenation of 1,3-butadiene,a key process in the purification of alkadiene for the upgrading of C4 cut,is presented by coupling steady-state catalytic testing,in-depth characterization,kinetic evaluation,and density functional theory calculations.We reveal that:(i) 1,3-Butadiene hydrogenation on iridium is structure-sensitive with the optimal particle size of about 2 nm,and the H_(2) dissociation energy is a reliable activity descriptor;(ii) The nature of the NC hosts exerts a critical impact on the catalytic performance,and balanced nitrogen content and speciation seem key for the optimized performance;and (iii) Different deactivation mechanisms occur:fouling by coke deposition on the catalysts with a high N:C ratio (>1),and site blockage due to the competitive adsorption between 1-butene/cis-2-butene and 1,3-butadiene.These molecular insights provide valuable guidelines for the catalyst design in selective hydrogenations. | Mengru Wang Yuxue Yue Yi Wang Xiaoling Mou Renqin Chang Zupeng Chen Ronghe Lin Jia Zhao Yunjie Ding | 2022 | Journal of Energy Chemistry2022，31，6： | 0 |
| 7 | Carbon Nitride with Single-Atom Nickel as Co-Catalyst for Visible-Light Promoted C—O Coupling显示文摘Solar-driven cross-coupling reactions by dual nickel/photocatalysis under mild conditions have received considerable attention.However,the existing photo/nickel dual catalytic cross-coupling reactions require the addition of expensive photosensitizers and organic ligands,and the catalytic activity is inadequate.Herein,we report a nickel single-atom heterogeneous catalyst supported on mesoporous carbon nitride for photocatalytic C—O coupling reaction between 4-bromobenzonitrile and ethanol,affording 4-ethoxybenzonitrile in excellent yield compared to a semi-heterogeneous catalytic system.The catalytic system exhibits a broad substrate scope including ketones,aldehydes,esters,and amides.This work presents a simple and cost-effective strategy for anchoring metal single atoms onto carbon nitride,providing a new platform for enabling high-performance photocatalytic production of aryl ether compounds. | En Zhao Lijie Chen Qi Zhu Zhaohui Chen Yanping Wei Wenjun Zhang Lin Dong Weiwei Fang Zupeng Chen | 2023 | Chinese Journal of Chemistry2023，41，23： | 0 |
| 8 | Amino acid promoted hydrogen battery system using Mn-pincer complex for reversible CO_(2) hydrogenation to formic acid显示文摘The worldwide energy system developed in the past century is highly dependent on non-renewable fossil feedstocks.Hence,the concentration of carbon dioxide(CO_(2))in the atmosphere has continuously increased from 280 ppm(parts per million)to>420 ppm since the industrial revolution[1–5].This excessive emission of CO_(2) causes global warming and ocean acidification.In this context,the Paris Agreement on Climate Change adopted in 2015 recognized the necessity of holding the increase of global average temperature below 2℃,preferably 1.5℃,above pre-industrial levels,and reaching a CO_(2)-neutral process by 2050. | Zupeng CHEN Henrik JUNGE Matthias BELLER | 2022 | Frontiers in Energy2022，16，5： | 0 |
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