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Pyrolyzing soft template-containing poly(ionic liquid)into hierarchical n-doped porous carbon for electroreduction of carbon dioxide

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Chinese Journal of Chemical Engineering 2022年第3期35卷 192-201页

作者： Mingdong Sun Zhengyun Bian Weiwei Cui Xiaolong Zhao Shu Dong Xuebin Ke Yu Zhou Jun Wang State Key Laboratory of materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China Department of Chemical Engineering University of HullHull HU67RXUnited Kingdom

Heteroatom-doped carbon materials have demonstrated great potential in the electrochemical reduction reaction of CO_(2)(CO_(2)RR)due to their versatile structure and ***,rational structure control remains one *** this work,we reported a unique carbon precursor of soft template-containing porous poly(ionic liquid)(PIL)that was directly synthesized via free-radical self-polymerization of ionic liquid monomer in a soft template *** of the carbonization temperature in a direct pyrolysis process without any additive yielded a series of carbon materials with facile adjustable textural properties and n ***,the integration of soft-template in the PIL precursor led to the formation of hierarchical porous carbon material with a higher surface area and larger pore size than that from the template-free *** CO_(2)RR to CO,the champion catalyst gave a Faraday efficiency of 83.0%and a current density of 1.79 mA·cm^(-2)at-0.9 V *** hydrogen electrode(***).The abundant graphite n species and hierarchical pore structure,especially the unique hierarchical small-/ultramicropores were revealed to enable better CO_(2)RR performance.

关键词： CO_(2)RR Poly(ionic liquid) n-doped carbon materials Pore diameter Hierarchical pore

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Insight into the mechanism of 5-hydroxymethylfurfural electroreduction to 2,5-bis(hydroxymethyl)furan over Cu anchored n-doped carbon nanosheets

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nano Research 2024年第9期17卷 7991-7999页

作者： Haoran Wu Xinwei Chen Haishan Xu Runlu Yang Xin Wang Junying Chen Zhenbing Xie Liang Wu Yiyong Mai School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China Department of Chemistry Tangshan Normal UniversityTangshan 063000China

Design of non-noble metal electrocatalysts for biomass conversion to high-value chemicals and understanding the related catalytic mechanisms are of profound significance but have remained a major ***,we developed a novel biomass-derived electrocatalyst(denoted as Cu/nC),featuring with electron-deficient copper nanoparticles anchored on n-doped carbon nanosheets,for the electrochemical reduction of 5-hydroxymethylfurfural(HMF)to 2,5-bis(hydroxymethyl)furan(BHMF,a vital precursor of functional polymers).The optimized Cu/nC electrocatalyst exhibited an excellent performance with high Faradaic efficiency(89.5%)and selectivity(90.8%)of BHMF at a low concentration of HMF(18.1 mM).Even at a very high HMF concentration(108.6 mM),the Faraday efficiency and selectivity of BHMF could still reach 74.8%and 81.1%,*** performance approached those of the reported noble metal-based *** study revealed that the n doping in the Cu/nC catalyst could regulate the electronic structure of Cu,strengthening the adsorption of the HMF carbonyl group,and thus boosting the selectivity of ***,strong electronic metal-support interactions of Cu and the n-doped carbon support optimized the charge transfer rate,thus promoting the dissociation of water to the active hydrogen(H^(*))species and boosting the reaction kinetic rate of H^(*)and HMF.

关键词： biomass 5-hydroxymethylfurfural electrochemical reduction n-doped carbon materials 2,5-bis(hydroxymethyl)furan

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Boosting Fischer-Tropsch Synthesis via Tuning of n Dopants in TiO_(2)@Cn-Supported Ru Catalysts

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Transactions of Tianjin University 2024年第1期30卷 90-102页

作者： Xincheng Li Yunhao Liu Dejian Zhao Shuaishuai Lyu Jingwei Ye Xiaoshen Li Peipei Wu Ye Tian Yingtian Zhang Tong Ding Song Song Qingpeng Cheng Xingang Li State Key Laboratory of Chemical Engineering Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Haihe Laboratory of Sustainable Chemical TransformationsTianjin Key Laboratory of Applied Catalysis Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Zhejiang Institute of Tianjin University Shaoxing 312300China Sinopec Research Institute of Petroleum Processing Co. LTDBeijing 100083China Physical Sciences and Engineering Division Advanced Membranes and Porous Materials(AMPM)CenterKing Abdullah University of Science and Technology(KAUST)23955-6900 ThuwalSaudi Arabia

nitrogen(n)-doped carbon materials as metal catalyst supports have attracted signifi cant attention,but the eff ect of n dopants on catalytic performance remains unclear,especially for complex reaction processes such as Fischer-Tropsch synthesis(FTS).Herein,we engineered ruthenium(Ru)FTS catalysts supported on n-doped carbon overlayers on TiO_(2)*** regulating the carbonization temperatures,we successfully controlled the types and contents of n dopants to identify their impacts on metal-support interactions(MSI).Our fi ndings revealed that n dopants establish a favorable surface environment for electron transfer from the support to the Ru ***,pyridinic n demonstrates the highest electron-donating ability,followed by pyrrolic n and graphitic *** addition to realizing excellent catalytic stability,strengthening the interaction between Ru sites and n dopants increases the Ru^(0)/Ru^(δ+)ratios to enlarge the active site numbers and surface electron density of Ru species to enhance the strength of adsorbed ***,it improves the catalyst’s overall performance,encompassing intrinsic and apparent activities,as well as its ability for carbon chain ***,the as-synthesized Ru/TiO_(2)@Cn-700 catalyst with abundant pyridine n dopants exhibits a superhigh C_(5+)time yield of 219.4 mol CO/(mol Ru·h)and C_(5+)selectivity of 85.5%.

关键词： Fischer-Tropsch synthesis n-doped carbon materials Ruthenium catalyst Pyridinic n Metal-n interaction

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