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Amorphous Catalysts for Electrochemical Water Splitting

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China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 1-13页

作者： Zhang Cong Wang Shuaiyang Rong Junfeng mi wanliang SINOPEC Research Institute of Petroleum Processing Research Center of Renewable EnergyBeijing102299China China University of Petroleum(Beijing) School of Chemical Engineering and EnvironmentBeijing102249China

Hydrogen production by water electrolysis is an important route for generating green ***,the development of efficient and inexpensive electrocatalysts is crucial for future industrial *** catalysts possess a large specific surface area with abundant structural *** addition,their structures can be tuned to provide more efficient active sites,leading to superior water electrolysis activity compared with their crystalline *** this review,we summarize recent progress on amorphous electrocatalysts for water splitting,with a focus on the reaction mechanisms under both acidic and alkaline conditions,catalyst synthesis,and the application of these catalysts to the hydrogen and oxygen evolution ***,we highlight the current challenges and promising opportunities relating to amorphous catalysts for electrochemical water splitting.

关键词： electrocatalysis water splitting amorphous synthesis mechanism

CO removal by two-stage methanation for polymer electrolyte fuel cell

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Journal of Natural Gas Chemistry 2008年第4期17卷 359-364页

作者： Zhiyuan Li wanliang mi Juan Gong Zhenlong Lu Lihao Xu Qingquan Su Department of Thermal Science and Energy Engineering School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China

In order to remove CO to achieve lower CO content of below 10 ppm in the CO removal step of reformer for polymer electrolyte fuel cell （PEFC） co-generation systems, CO preferential methanation under various conditions were studied in this paper. Results showed that, with a single kind of catalyst, it was difficult to reach both CO removal depth and CO2 conversion ratio of below 5%. Thus, a two-stage methanation process applying two kinds of catalysts is proposed in this study, that is, one kind of catalyst with relatively low activity and high selectivity for the first stage at higher temperature, and another kind of catalyst with relatively high activity and high selectivity for the second stage at lower temperature. Experimental results showed that at the first stage CO content was decreased from 1% to below 0.1% at 250-300 ℃, and at the second stage to below 10 ppm at 150-185 ℃. CO2 conversion was kept less than 5%, At the same time, influence of inlet CO content and GHSV on CO removal depth was also discussed in this paper.

关键词： preferential methanation two-stage CO removal PEFC conversion ratio

A Study on the Effects of Carrier Gases on the Structure and Morphology of Carbon Nanotubes Prepared by Pyrolysis of Ferrocene and C_2H_2 mixture

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Journal of Natural Gas Chemistry 2005年第3期14卷 151-155页

作者： wanliang mi Jerry Yuesheng Lin Qian Mao Yongdan Li Baoquan Zhang School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China Department of Chemical and Materials Engineering Arizona State University Tempe AZ 85287-6006 United States

Carbon nanotubes （CNTs） were prepared using different carrier gases, with ferrocene as the catalyst precusor and acetylene as the carbon source. The effects of ammonia and nitrogen as carrier gases on the structure and morphology of CNTs were investigated. Transmission electron microscope （TEM）, high-resolution electron microscope （HRTEM）, scanning electron microscope （SEM） and X-ray diffraction （XRD） were employed to characterize the products and the catalyst. Experiment results show that the CNTs grown in N2 gas exhibited cylindrical and tubular structure, while a bamboo-like structure was observed for the CNTs grown in NH3 gas. Moreover, vertically aligned CNTs were obtained on an A12O3 disk when NH3 was used as the carrier gas. The carrier gas also exerted influence on the shape of the catalyst. Based on the theory of active centers of catalysis and combined with the particle shape of the catalyst, a growth model for the vertically aligned CNTs on the substrate is given.

关键词： carbon nanotube ferrocene vertically aligned bamboo-like carrier gas growth model

Single-atomic Mn sites coupled with Fe_(3)C nanoparticles encapsulated in carbon matrixes derived from bimetallic Mn/Fe polyphthalocyanine conjugated polymer networks for accelerating electrocatalytic oxygen reduction

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Nano Research 2022年第9期15卷 7976-7985页

作者： Yuan Pan min Li wanliang mi minmin Wang Junxi Li Yilin Zhao Xuelu Ma Bin Wang Wei Zhu Zhiming Cui Hailiang Yin Yunqi Liu State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580China Key Laboratory of Advanced Energy Materials Chemistry(ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Research Institute of Petroleum Processing SinopecBeijing 100083China School of Chemical&Environmental Engineering China University of Mining&TechnologyBeijing 100083China School of Chemistry and Chemical Engineering Shaanxi Normal UniversityXi’an 710119China State Key Lab of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Fuel Cell Technology of Guangdong Province South China University of TechnologyGuangzhou 510641China Academy of Science&Technology China University of Petroleum(East China)Dongying 257061China

The construction of robust coupling catalysts for accelerating electrocatalytic oxygen reduction reaction(ORR)through the modulation of the electronic structure and local atomic configuration is critical but remains ***,we report a facile and effective isolation-polymerization-pyrolysis(IPP)strategy for high-precision synthesis of single-atomic Mn sites coupled with Fe_(3)C nanoparticles encapsulated in N-doped porous carbon matrixes(Mn SAs/Fe_(3)C NPs@NPC)catalyst derived from predesigned bimetallic Fe/Mn polyphthalocyanine(FeMn-BPPc)conjugated polymer networks by solid-phase reaction *** from the synergistic effects between the single-atomic Mn-N_(4)sites and Fe_(3)C NPs as well as the confinement effect of NPC,the Mn SAs/Fe_(3)C NPs@NPC catalyst exhibited excellent electrocatalytic activity and stability for *** assembled Znair battery displayed larger power density of 186 mW·cm^(−2)than that of Pt/C+Ir/C-based *** also exhibits excellent stability without obvious voltage change after 106 cycles with 36 *** in-situ Raman spectra with in-situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS)characterization results indicated that the Mn-N_(4)site as an active site for the O_(2)adsorption-activation process,which effectively facilitates the generation of key*OOH intermediates and*OH desorption to promote the multielectron reaction *** calculation reveals that the excellent electrocatalytic performance originates from the charge redistribution and the d orbital shift resulting from Mn-Fe bond,which buffers the activity of ORR through the electron reservoir capable of electron donation or *** work paves a novel IPP strategy for constructing high-performance coupling electrocatalyst towards the ORR for energy conversion devices.

关键词： single atom catalyst nanoparticles electrocatalyst oxygen reduction zinc-air battery

A 10kW-scale Distributed Power Plant of Natural Gas-Proton Exchange Membrane Fuel Cell

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Chinese Journal of Chemical Engineering 2010年第6期18卷 988-994页

作者： BAO Cheng SU Qingquan mi wanliang LI Zhiyuan HI Quan JI Zhonghua LIU Zhixiang MAO Zongqiang Department of Thermal Science and Energy Engineering School of Mechanical Engineering University of Science& Technology Beijing Beijing 100083 China Hanergy Technology Co. Ltd. Beijing 102209 China Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China

A 10 kW-scale natural gas fueled proton exchange membrane fuel cell(PEMFC) distributed power plant is presented in this paper,which is designed for cogeneration of power and heat. With homemade catalysts for CO removal in a two-stage methanation process and integrated reactor in the fuel processing system,the reformed fuel with CO molar fraction less than 10-5 is obtained for the fuel cell stack. Based on Matlab/Simulink/Stateflow and xPC Target platform,a rapid control prototype(RCP) is developed for real-time condition management,signal tracking and parameter tuning,data storing,and man-machine interaction. In a typical running with 4.3 kW stack power,the hydrogen production efficiency,gross power generation efficiency and heat recovery efficiency approach to 76%,41% and 50%,respectively. The peak stack power reaches 7.3 kW. Though there is still considerable dis-tance to long-term operation at 10 kW-scale net power generation,it is a milestone for the PEMFC-based stationary application in China.

关键词： proton exchange membrane fuel cell natural gas 10kW-scale power plant two-stage methanation xPC-based rapid control prototype

质子交换膜(PEM)水电解制氢技术进展及应用前景

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石油炼制与化工 2021年第10期52卷 78-87页

作者：米万良荣峻峰中国石化石油化工科学研究院北京100083

介绍了PEM水电解制氢的国内外应用与示范案例,结合未来可再生能源发电发展趋势,剖析了PEM水电解制氢在“双碳”目标下的应用方向和前景;同时,对PEM水电解制氢的阴阳极催化剂、质子交换膜、膜电极、集电器、双极板等关键材料和部件技术... 详细信息

介绍了PEM水电解制氢的国内外应用与示范案例,结合未来可再生能源发电发展趋势,剖析了PEM水电解制氢在“双碳”目标下的应用方向和前景;同时,对PEM水电解制氢的阴阳极催化剂、质子交换膜、膜电极、集电器、双极板等关键材料和部件技术研究进展进行了综述,重点阐述了低Ir阳极催化剂、非Ir和低Pt阴极催化剂未来发展的几种技术路线,总结了PEM水电解制氢的主要问题和未来发展方向。

关键词：质子交换膜水电解绿氢碳减排碳中和膜电极双极板集电器

单原子催化材料在电化学氢循环应用中的研究进展

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高等学校化学学报 2022年第5期43卷 159-175页

作者：陈长利米万良李煜璟北京理工大学材料学院北京100081 中国石油化工股份有限公司石油化工科学研究院北京102299

单原子催化剂(SACs)是一类仅含有孤立的单个金属原子作为催化活性中心的催化材料.由于其具有100%的原子利用率、独特的化学结构及优异的催化活性等优点,近年来在电化学催化和电能转换设备领域备受关注.本文综合评述了单原子催化材料的... 详细信息

单原子催化剂(SACs)是一类仅含有孤立的单个金属原子作为催化活性中心的催化材料.由于其具有100%的原子利用率、独特的化学结构及优异的催化活性等优点,近年来在电化学催化和电能转换设备领域备受关注.本文综合评述了单原子催化材料的设计理念、合成方法和表征方法,同时对其在氢电化学循环(电解水制氢和氢燃料电池领域)的实际应用进行了系统介绍,并对单原子催化材料的研究和应用前景进行了展望.

关键词：单原子催化材料电催化电解水制氢氢燃料电池

稀土镱助剂及制备方法对镍基催化剂天然气水蒸气重整性能的影响

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化工学报 2011年第4期62卷 953-961页

作者：徐立昊米万良苏庆泉北京科技大学机械工程学院热科学与能源工程系北京100083

着重考察了稀土助剂Yb及两种浸渍制备法(共浸渍和分步浸渍)对Ni/γ-Al2O3型重整催化剂的活性、抗积炭性以及抗烧结性的影响,并与稀土助剂La、Ce进行了比较,进而通过催化剂的BET、XRD、TPR、H2化学吸附、TG表征,对其影响机理进行了讨论... 详细信息

着重考察了稀土助剂Yb及两种浸渍制备法(共浸渍和分步浸渍)对Ni/γ-Al2O3型重整催化剂的活性、抗积炭性以及抗烧结性的影响,并与稀土助剂La、Ce进行了比较,进而通过催化剂的BET、XRD、TPR、H2化学吸附、TG表征,对其影响机理进行了讨论。实验结果表明:添加稀土助剂能够有效提高活性金属Ni的分散度,从而提高其催化活性,同时还提高了抗积炭以及抗烧结性能,共浸渍法使活性金属Ni较难还原,影响了催化剂的低温活性。活性强化效果从大到小的顺序为Yb>Ce>La,而抗积炭性能强化效果由强到弱的顺序为Ce>Yb>La。Yb助剂改性的Ni/γ-Al2O3重整催化活性优于德国南方化学与四川亚联两种Ni系商业重整催化剂。

关键词：天然气水蒸气重整 Ni/γ-Al2O3系催化剂稀土助剂Yb 表征

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入口气体组成对天然气重整工作温度的影响

化工学报 2008年第3期59卷 687-693页

作者：龚娟苏庆泉米万良李志远徐立昊北京科技大学机械工程学院热科学与能源工程系北京100083

重整催化剂是影响重整制氢系统造价和寿命的重要因素。由于在所需重整温度下容易烧结积炭,廉价的Ni系催化剂在分布式中小型重整反应器中的应用受到了限制。为了使Ni系催化剂在不易发生烧结积炭的温度下工作,分析了在一定原料CH4空速和... 详细信息

重整催化剂是影响重整制氢系统造价和寿命的重要因素。由于在所需重整温度下容易烧结积炭,廉价的Ni系催化剂在分布式中小型重整反应器中的应用受到了限制。为了使Ni系催化剂在不易发生烧结积炭的温度下工作,分析了在一定原料CH4空速和转化率下入口气体组成对重整工作温度的影响,并探讨了在原料气中导入循环气来改变重整入口气体组成的方法。结果表明:Ni系催化剂在导入一定组成和流量比的循环气与不导入循环气时相比,一定原料CH4空速和转化率下的重整工作温度大幅降低。据此,提出了一种用于燃料电池电站氢源系统的重整制氢工艺流程,其特征是将部分燃料电池阳极出口气作为循环气与原料气混合后导入重整反应器,使天然气重整工作温度大幅降低。

关键词：天然气水蒸气重整 Ni系催化剂循环气燃料电池工艺流程