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P-doped mesoporous carbons for high-efficiency electrocatalytic oxygen reduction

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Chinese Journal of Catalysis 2019年第9期40卷 1366-1374页

作者： Hui Zhao zhong-Pan Hu Yun-Pei Zhu Li Ge zhong-yong yuan National Institute for Advanced Materials School of Materials Science and EngineeringNankai UniversityTianjin 300350China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Nankai UniversityTianjin 300071China

Chemically modified carbonaceous materials have attained utmost attention in the fields of renewable energy storage and conversion,due to the controllable physicochemical properties,tailorable micro-/nanostructures,and respectable ***,P-doped mesoporous carbons were synthesized by using F127 as the soft template,organophosphonic acid as the P source and phenolic resin as the carbon *** amounts of iron species were introduced to act as a graphitization *** synthesized carbons exhibit the well-defined wormhole-like pore structure featuring high specific surface area and homogenously doped P ***,introducing iron species during the synthesis process can optimize the textural properties and the degree of graphitization of carbon *** doping amount of P has an important effect on the porous structure and the defect degree,which correspondingly influence the active sites and the oxygen reduction reaction(ORR)*** resultant material presents superior catalytic activity for the ORR,together with remarkably enhanced durability and methanol tolerance in comparison with the commercial Platinum catalyst,demonstrating the possibility for its use in electrode materials and electronic nanodevices for metal-air batteries and fuel cells.

关键词： P-doping Mesoporous carbons Electrocatalyst Oxygen reduction reaction

Mesoporous carbons as metal-free catalysts for propane dehydrogenation: Effect of the pore structure and surface property

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Chinese Journal of Catalysis 2019年第9期40卷 1385-1394页

作者： zhong-Pan Hu Jin-Tao Ren Dandan Yang Zheng Wang zhong-yong yuan Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 300350China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021NingxiaChina

Nanocarbon materials have been used as important metal-free catalysts for various reactions including alkane ***,clarifying the active sites and tuning the nanocarbon structure for direct dehydrogenation have always been significantly challenging owing to the lack of fundamental understanding of the structure and surface properties of carbon ***,mesoporous carbon materials with different pore ordering and surface properties were synthesized through a soft-templating method with different formaldehyde/resorcinol ratios and carbonization temperatures and used for catalytic dehydrogenation of propane to *** highly ordered mesoporous carbons were found to have higher catalytic activities than disordered and ordered mesoporous carbons,mainly because the highly ordered mesopores favor mass transportation and provide more accessible active ***,mesoporous carbons can provide a large amount of surface active sites owing to their high surface areas,which is favorable for propane dehydrogenation *** control the surface oxygenated functional groups,highly ordered mesoporous carbons were carbonized at different temperatures(600,700,and 800℃).The propylene formation rates exhibit an excellent linear relationship with the number of ketonic C=O groups,suggesting that C=O groups are the most possible active sites.

关键词： Mesoporous carbons Propane Dehydrogenation Propylene Metal-free catalysis

Ordered Mesoporous Metal Phosphonate Materials with Crystal-like Walls for Multi-functional Applications

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Ordered Mesoporous Metal Phosphonate Materials with Crystal-...

第十六届全国分子筛大会

作者： Tian-Yi Ma zhong-yong yuan Institute of New Catalytic Materials Chemistry Nankai University

＜正＞Hybrid mesoporous materials with organic-inorganic network have recently attracted much *** acids and their derivatives（salts,esters）with a great variety and very wide sources are quite complementary to organosilicon coupling molecules for the preparation of ordered mesoporous hybrid organic-inorganic materials.A series of mesoporous and macroporous

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Controllable Fabrication of Heteroatoms-Doped Mesoporous Carbon-Based Materials for Efficient Electrocatalytic Processes

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Controllable Fabrication of Heteroatoms-Doped Mesoporous Car...

第十届全国催化剂制备科学与技术研讨会（成都）

作者： zhong-yong yuan Jin-Tao Ren National Institute for Advanced Materials School of Materials Science and Engineering Nankai University

＜正＞Carbonaceous materials have become one of the hotspots of interdisciplinary research because of its unique physical and chemical properties and structure. It has shown great potential in the fields of electrocatalytic oxygen reduction, oxygen evolution and hydrogen evolution. However, the electrocatalytic performance of modified carbonaceous materials still fall short of replacing the state-of-the-art noble metal materials,

关键词： Mesoporous carbon Electrocatalyst Oxygen reduction reaction Oxygen evolution reaction Hydrogen evolution reaction

Nature of active phase of VO_x catalysts supported on SiBeta for direct dehydrogenation of propane to propylene

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Chinese Journal of Catalysis 2020年第2期41卷 276-285页

作者： Chong Chen Minglei Sun zhongpan Hu Yuping Liu Shoumin Zhang zhong-yong yuan National Institute for Advanced Materials School of Materials Science and EngineeringNankai UniversityTianjin 300350China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)College of ChemistryNankai UniversityTianjin 300071China

The VOx catalysts supported on dealuminated Beta zeolite(Si Beta) with varying V loadings(from 0.5 to 10 wt%) are prepared and tested for their catalytic activities in the reaction of direct dehydrogenation of propane to propylene(PDH). It is characterized that the VSi Beta catalysts possess different kinds of vanadium species on the Si Beta support, including monomeric or isolated VOx species at a low V loading, and polynuclear VOx species in different polymerization degrees at higher V loadings. The 3 VSi Beta catalyst(V loading is 3 wt%), containing isolated VOx species in monolayer, shows around 40% of propane conversion with 90% of propylene selectivity(reaction conditions: 600 o C, 4000 m L g–1 h–1) which are comparable to VSi Beta catalysts with higher V loadings. The catalytic activity exhibits a good linear relationship with the amount of generated acidic sites, which are derived from the interaction sites between VOx species and Si Beta support, and keeps stable after several regeneration cycles. Thus, as the VOx species directly contact with Si Beta support via V–O–Si bonds, a reactivity enhancement can be achieved. While, the initial valence state of V does not seem to influence the catalytic performance. Moreover, the aggregation degree of VOx species determines the propylene selectivity and deactivation rate, both of which increase as raising the V loading amount.

关键词： Propane dehydrogenation Propylene VOx species SiBeta support Active sites

Phosphonate-derived nitrogen-doped cobalt phosphate/carbon nanotube hybrids as highly active oxygen reduction reaction electrocatalysts

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Chinese Journal of Catalysis 2020年第2期41卷 259-267页

作者： Hui Zhao Chen-Chen Weng Jin-Tao Ren Li Ge Yu-Ping Liu zhong-yong yuan National Institute for Advanced Materials School of Materials Science and EngineeringNankai UniversityTianjin 300350China School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

The exploration of cost-effective non-noble-metal electrocatalysts is highly imperative to replace the state-of-the-art platinum-based catalysts for oxygen reduction reaction(ORR). Here, we prepared cobalt phosphonate-derived N-doped cobalt phosphate/carbon nanotube hybrids(Co Pi C-N/CNTs) by hydrothermal treatment of N-containing cobalt phosphonate and oxidized carbon nanotubes(o-CNT) followed by high-temperature calcination under nitrogen atmosphere. The resultant Co Pi C-N/CNT exhibits a superior electrocatalytic performance for the ORR in alkaline media, which is equal to the commercial Pt/C catalyst in the aspect of half-wave potential, onset potential and diffuse limiting current density. Furthermore, the excellent tolerance to methanol and strong durability outperform those of commercial Pt/C. It is found that cobalt phosphonate-derived N-doped cobalt phosphate and the in-situ formed graphitic carbons play key roles on the activity enhancement. Besides, introducing a suitable amount of CNTs enhances the electronic conductivity and further contributes to the improved ORR performance.

关键词： Metal phosphonate Metal phosphate Carbon nanotubes Oxygen reduction reaction Electrocatalysis

KL-11-Ordered mesoporous and hierarchical meso-/macroporous metal phosphonate materials and their applications in adsorption and catalysis

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KL-11-Ordered mesoporous and hierarchical meso-/macroporous ...

第十五届全国分子筛大会

作者： zhong-yong yuan Tian-Yi Ma Xue-Jun Zhang Institute of New Catalytic Materials Science College of ChemistryNankai University

＜正＞Much interest has been attracted in the designed synthesis of ordered mesoporous materials with various compositions,controlled pore structures,tailed pore sizes and desirable morphologies for multi-functional application ***,the incorporation of macropores into the mesoporous materials has been found to be interesting and useful for catalysis,adsorption and engineering pore systems,because hierarchical materials with different pore sizes integrated in

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Ordered Mesoporous Graphitic Carbon Nitride Materials for CO2 Capture

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Ordered Mesoporous Graphitic Carbon Nitride Materials for CO...

第十六届全国分子筛大会

作者： Qing-Fang Deng Xiu-Zhen Lin Lei Liu zhong-yong yuan Institute of New Catalytic Materials Science Key Laboratory of Advanced Energy Materials Chemistry （Ministry of Education） College of Chemistry Nankai University

基于迁出地动态选择与自适应迁入策略的BBO算法

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计算机科学 2016年第10期43卷 282-286页

作者：唐继勇仲元昌曾广朴重庆电子工程职业学院计算机学院重庆401331 重庆大学飞行器测控与通信教育部重点实验室重庆400044 长江师范学院计算机工程学院重庆408100

Dan Simon用生物地理学的方法和机制来解决工程优化问题,提出了生物地理学优化算法(Biogeography Based Optimization,BBO)。该算法因其独特的搜索机制和较好的性能在智能优化算法领域得到了广泛的关注。为了进一步提高生物地理学优化... 详细信息

Dan Simon用生物地理学的方法和机制来解决工程优化问题,提出了生物地理学优化算法(Biogeography Based Optimization,BBO)。该算法因其独特的搜索机制和较好的性能在智能优化算法领域得到了广泛的关注。为了进一步提高生物地理学优化算法的全局和局部收索能力,提出了一种基于动态选择迁出地与混合自适应迁入的优化策略,对生物地理学优化算法进行改进,形成一种新的改进型BBO算法。该算法根据进化阶段动态选择待迁出地,并综合当前迁出地和随机迁出地优化迁入策略;同时,设计与适应度相关的变异机制,以增加算法的全局搜索能力。仿真实验结果表明,该算法在全局搜索、收敛速度和收敛精度上均优于对比算法。

关键词：生物地理学优化动态选择自适应迁入自适应变异