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Engineering oxygen vacancies on Tb-doped ceria supported pt catalyst for hydrogen production through steam reforming of long-chain hydrocarbon fuels

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Chinese Journal of Chemical Engineering 2024年第4期68卷 181-192页

作者： Zhourong Xiao Changxuan Zhang Peng Li Desong Wang Xiangwen Zhang Li Wang Jijun Zou Guozhu Li State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Steam reforming of long-chain hydrocarbon fuels for hydrogen production has received great attention for thermal management of the hypersonic vehicle and fuel-cell *** this work,pt catalysts supported on CeO_(2)and Tb-doped CeO_(2)were prepared by a precipitation *** physical structure and chemical properties of the as-prepared catalysts were characterized by powder X-ray diffraction,scanning electron microscopy,transmission electron microscopy,Raman spectroscopy,H_(2)temperature programmed reduction,and X-ray photoelectron *** results show that Tb-doped CeO_(2)supported pt possesses abundant surface oxygen vacancies,good inhibition of ceria sintering,and strong metal-support interaction compared with CeO_(2)supported *** catalytic performance of hydrogen production via steam reforming of long-chain hydrocarbon fuels(n-dodecane)was *** with 2pt/CeO_(2),2pt/Ce_(0.9)Tb_(0.1)O_(2),and 2pt/Ce_(0.5)Tb_(0.5)O_(2),the 2pt/Ce_(0.7)Tb_(0.3)O_(2)has higher activity and stability for hydrogen production,on which the conversion of n-dodecane was maintained at about 53.2%after 600 min reaction under 700℃at liquid space velocity of 9 ml·g^(-1)·h^(-1).2pt/CeO_(2)rapidly deactivated,the conversion of n-dodecane was reduced to only 41.6%after 600 min.

关键词： Steam reforming n-Dodecane Hydrogen production pt-based catalyst Oxygen vacancy CeO_(2)

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Improving hydrogen evolution reaction efficiency through lattice tuning

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Nano Research 2024年第7期17卷 5907-5913页

作者： Zipeng Zhao Haotian Liu Wenpei Gao Praveen Kolla Wang Xue Zeyan Liu Jinghua Guo Sanjeev Mukerjee Xiaoqing Pan Qingying Jia Xiangfeng Duan Yu Huang Department of Materials Science and Engineering University of CaliforniaLos AngelesCalifornia 90095USA Department of Chemical Engineering and Materials Science University of CaliforniaIrvineCalifornia 92697USA Materials Science and Engineering North Carolina State UniversityRaleighNorth Carolina 27695USA Department of Chemistry and Chemical Biology Northeastern UniversityBostonMassachusetts 02115USA Department of Chemistry and Biochemistry University of CaliforniaLos AngelesCalifornia 90095USA Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCalifornia 94720USA Department of Chemistry and Biochemistry University of CaliforniaSanta CruzCalifornia 95064USA Department of Physics and Astronomy University of CaliforniaIrvineCalifornia 92697USA California Nanosystems Institute University of CaliforniaLos AngelesCalifornia 90095USA

The intermittent nature of renewable energy sources sets a requirement for efficient energy storage to mitigate the conflict between energy supply and *** is a promising choice for energy storage due to its high energy ***,the conversion of electrical energy to chemical energy stored in hydrogen through water electrolysis suffers from low efficiency,and the electricity cost dominates the total cost of hydrogen ***,we report the study of improving the hydrogen evolution reaction activity of pt-based catalysts by building a nanoscale surface NiO and pt interface,further optimizing the performance via tuning the lattice parameter of the core of nanoparticles,which can be achieved by varying the dealloying annealing *** optimized ptCuNi-O/C and ptNi-O/C catalysts are demonstrated to be one of the best catalysts,with a mass activity(MA)of 9.1 and 8.7 mA/μgpt,which is 9.9-fold and 9.5-fold of that of pt/C,respectively.

关键词： lattice tuning pt-based catalyst hydrogen evolution reaction electrocatalysis

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pt confined in Sn-ECNU-46 zeolite for efficient alkane dehydrogenation

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结构化学 2024年第4期43卷 15-23页

作者： Naihong Wang Longkang Zhang Yejun Guan Peng Wu Hao Xu Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal UniversityShanghai200062China State Key Laboratory of Petroleum Molecular & Process Engineering SKLPMPE Sinopec Research Institute of Petroleum Processing Co.LTD.Beijing100083China East China Normal University Shanghai200062China

Highly dispersed and stable pt-based catalysts play a crucial role in constructing efficient catalytic systems for alkane *** this study,a novel bimetallic pt-Sn catalyst confined in extra-large-pore ECNU-46 zeolite(denoted as pt/Sn-ECNU-46)is prepared by *** open-site framework Sn species((SiO)3Sn-OH)serve as anchors to interact with pt species,favoring the high dispersion of *** the other hand,the framework Sn species act as the second metal to regulate the geometrical and electronic environment of pt species,thus suppressing their ***/Sn-ECNU-46 achieves a good performance in propane dehy-drogenation(PDH)reaction with high initial propane conversion(46％)and propylene selectivity(＞99％)as well as regeneration *** addition,pt/Sn-ECNU-46 is also active in the dehydrogenation of *** study explores the application of extra-large-pore zeolite as support in constructing metal-confined catalysts for alkane dehydrogenation.

关键词： Alkane dehydrogenation Heteroatom-containing zeolite Zeolite confined catalyst pt-based catalyst

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Series Reports from Professor Wei's Group of Chongqing University:Advancements in Electrochemical Energy Conversions(1/4):Report 1:High-performance Oxygen Reduction catalysts for Fuel Cells

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电化学（中英文） 2024年第7期30卷 1-27页

作者： Fa-Dong Chen Zhuo-Yang Xie Meng-Ting Li Si-Guo Chen Wei Ding Li Li Jing Li Zi-Dong Wei State Key Laboratory of Advanced Chemical Power Sources(Chongqing University) College of Chemistry and Chemical EngineeringChongqing UniversityChongqing400044China

Two major challenges,high cost and short lifespan,have been hindering the commercialization process of lowtemperature fuel *** Wei's group has been focusing on decreasing cathode pt loadings without losses of activity and durability,and their research advances in this area over the past three decades are briefly reviewed *** the pt-based catalysts and the low pt usage,they have firstly tried to clarify the degradation mechanism of pt/C catalysts,and then demonstrated that the activity and stability could be improved by three strategies:regulating the nanostructures of the active sites,enhancing the effects of support materials,and optimizing structures of the three-phase *** pt-free catalysts,especialiy carbon-based ones,several strategies that they proposed to enhance the activity of nitrogen-/heteroatom-doped carbon catalysts are firstly ***,an indepth understanding of the degradation mechanism for carbon-based catalysts is discussed,and followed by the corresponding stability enhancement ***,the carbon-based electrode at the micrometer-scale,faces the challenges such as low active-site density,thick catalytic layer,and the effect of hydrogen peroxide,which require rational structure design for the integral cathodic *** review finally gives a brief conclusion and outlook about the low cost and long lifespan of cathodic oxygen reduction catalysts.

关键词： Fuel cell Oxygen reduction reaction pt-based catalyst Carbon-based catalyst

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Interfacial synergistic effect in SnO_(2)/ptNi nanocrystals enclosed by high-index facets for high-efficiency ethylene glycol electrooxidation

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Nano Research 2022年第9期15卷 7877-7886页

作者： Shuna Li Haixiao Sun Jiaai Zhang Longjiao Zheng Yunrui Li Xu Fang Yujie Liu Qi Song Zhen Wang Yufeng Gao Xin Zhang Xiaoping Dai Yandi Cai Fei Gao State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of PetroleumBeijing 102249China Jiangsu Key Laboratory of Vehicle Emissions Control School of the EnvironmentNanjing UniversityNanjing 210093China

Strengthening the oxide-metal interfacial synergistic interaction in nanocatalysts is identified as potential strategy to boost intrinsic activities and the availability of active sites by regulating the surface/interface environment of ***,the SnO_(2)/ptNi concave nanocubes(CNCs)enclosed by high-index facets(HIFs)with tunable SnO_(2)composition are successfully fabricated through combining the hydrothermal and self-assembly *** interfacial interaction between ultrafine SnO_(2)nanoparticles and ptNi with HIFs surface structure is characterized by analytical *** as-prepared 0.20%SnO_(2)/ptNi catalyst exhibits extraordinarily high catalytic performance for ethylene glycol electrooxidation(EGOR)in acidic conditions with specific activity of 3.06 mA/cm^(2),which represents 6.2-fold enhancement compared with the state-of-the-art pt/C ***,the kinetic study demonstrates that the strong interfacial interaction between SnO_(2)and ptNi not only degrades the activation energy barrier during the process of EGOR but also enhances the CO-resistance ability and long-term *** study provides a novel perspective to construct highly efficient and stable electrocatalysts for energy conversions.

关键词： pt-based catalyst high-index facets undercoordinated surface atoms interfacial synergistic effect ethylene glycol electrooxidation

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Segmented Au/ptCo heterojunction nanowires for efficient formic acid oxidation catalysis

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Fundamental Research 2021年第4期1卷 453-460页

作者： Yingjun Sun Bolong Huang Yingjie Li Yingnan Qin Ziqi Fu Mingzi Sun Lei Wang Shaojun Guo School of Materials Science and Engineering Peking UniversityBeijing100871China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloon 999077Hong Kong SARChina BIC-ESAT College of EngineeringPeking UniversityBeijing100871China

Exploring a new strategy for the removal of adsorbed CO (CO^(*)) on a pt surface at a low potential is the key to achieving enhanced catalysis for the formic acid oxidation reaction (FAOR);however, the development of such a strategy remains a significant challenge. Herein, we report a class of Au/ptCo heterojunction nanowires (HNWs) as efficient electrocatalysts for accelerating the FAOR. This heterojunction structure and the induced Co alloying effects can facilitate formic acid adsorption/activation on pt with high CO tolerance, generating the FAOR pathway from dehydration to dehydrogenation. The optimized Au_(23)/pt_(63)Co_(14) HNWs showed the highest specific and mass activities of 11.7 mA cm^(−2)pt and 6.42 A mg^(−1)pt reported to date, respectively, which are considerably higher than those of commercial pt/C. DFT calculations confirmed that the electron-rich Au segment enhances the electronic activity of the ptCo NWs, which not only allows the construction of a highly efficient electron transfer channel for the FAOR but also suppresses CO formation.

关键词： Formic acid oxidation reaction pt-based catalyst Heterojunction structure Nanowires Electrocatalysis

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Activity Enhancement of pt/MnOx catalyst by Novel β-MnO2 for Low-temperature CO Oxidation: Study of the CO–O2 Competitive Adsorption and Active Oxygen Species

Activity Enhancement of Pt/MnOx Catalyst by Novel β-MnO2 fo...

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第十届全国催化剂制备科学与技术研讨会（成都）

作者：张宁强李伶聪宋丽云张桂臻何洪北京工业大学

Low-temperature oxidation of carbon monoxide(CO) is one of the most studied reactions because of its scientific and industrial applications.1-2 In this work, we discovered that the low-temperature CO oxidation activity over pt/MnOx catalyst could be enhanced by a novel β-MnO support materials. Nearly complete CO conversion was obtained over the pt/MnO catalyst below 100℃ under our catalytic conditions.

关键词： pt-based catalyst MnO2 CO Oxidation Competitive Adsorption Active Oxygen Species

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