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Photothermal catalysts for efficient and clean fuel production at atmospheric pressure

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Science China Chemistry 2024年第6期67卷 1762-1764页

作者： Xinwei Guan Yang Chen tianyi ma School of Science RMIT UniversityMelbourneVIC3000Australia Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang110036China

The use of waste carbon resources to produce valuable chemicals and hydrocarbon fuels has attracted great interest in recent *** a transformation not only maximises the utilisation of carbon resources but also plays a... 详细信息

关键词： thermal transformation clean

Synthesis of porous hematite nanorods loaded with CuO nanocrystals as catalysts for CO oxidation

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Journal of Natural Gas Chemistry 2011年第6期20卷 669-676页

作者： Jianliang Cao Yan Wang tianyi ma Yuping Liu Zhongyong Yuan Institute of New Catalytic materials science Key Laboratory of Advanced Energy Materials Chemistry （Ministry of Education） College of Chemistry Nankai University Tianjin 300071 China

Porous hematite （α-Fe2O3） nanorods with the diameter of 20-40 nm and the length of 80-300 nm were synthesized by a simple surfactant-assisted method in the presence of cetyltrimethylammonium bromide （CTAB）.The α-Fe2O3 nanorods possess a mesostructure with a pore size distribution in the range of 5-12 nm and high surface area,exhibiting high catalytic activity for CO *** nanocrystals were loaded on the surface of porous α-Fe2O3 nanorods by a deposition-precipitation method,and the catalysts exhibited superior activity for catalytic oxidation of CO,as compared with commercial α-Fe2O3 powders supported CuO *** enhanced catalytic activity was attributed to the strong interaction between the CuO nanocrystals and the support of porous α-Fe2O3 nanorods.

关键词： porous materials iron oxide nanostructures CuO supported nanocatalysts catalytic CO oxidation

Redox-etching induced porous carbon cloth with pseudocapacitive oxygenic groups for flexible symmetric supercapacitor

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Journal of Energy Chemistry 2022年第1期31卷 136-143,I0005页

作者： Xu Han Zi-Hang Huang Fanjin Meng Baohua Jia tianyi ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang 110036LiaoningChina Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthornVIC 3122Australia

Constructing high-performance electrodes with both wide potential window(e.g.≥2 V in aqueous electrolyte)and excellent mechanical flexibility represents a great challenge for *** of the outstanding conductivity and flexibility,carb on cloth(CC)has show n unlimited prospects for constructing flexible electrodes,but is rarely used directly as electrode material due to its electrochemical inertness and small specific surface *** tackle these two critical limitations,we design a novel redox-etching strategy to synthesize CC-based electrode with 3D interconnecting pore *** sponge-like highly porous CC was further activated by strong oxidant to form abundant oxygenic groups,which occupy the interior and surface of current collector to render substantial *** as-synthesized CC electrode yielded an impressive capacitance of 4035 mF cm^(-2) at 3 ma cm^(-2) and satisfying cycling durability in a wide potential range of-1-1 V ***,which surpass the majority of reported CC-based electrodes.A symmetric supercapacitor with stable voltage of 2 V is assembled and delivers remarkable energy density of 6.57 mWh cm^(-3).Significantly,the device demonstrates an unparalleled flexibility with no capacitive decay after 100 bending *** facile chemical etching and post-treatment processes are designed for large-scale manufacturing of the CC electrodes by providing high surface area and abundant electrochemically active sites,promising for industry *** innovative synthetic strategy ope ns up new opportunities for high-performance flexible en ergy storage.

关键词： Porous carbon fiber Hierarchical pores Oxygenic groups Wide potential window High-performance supercapacitors

Surface-defective FeS2 for electrochemical NH3 production under ambient conditions

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Nano materials Science 2020年第2期2卷 132-139页

作者： Daming Feng Xu Zhang Ying Sun tianyi ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced MaterialsCollege of ChemistryLiaoning UniversityShenyang110036China Discipline of Chemistry University of NewcastleCallaghanNSW2308Australia

In the viewpoint of ammonia economy,electrochemical N2 reduction reaction(NRR)under mild condition is a very promising approach for sustainable *** virtue of robust activity and low cost,transition-metalbased materials become one kind of the most attractive electrocatalysts in realizing ammonia synthesis to the industrial ***,the investigation related to NRR electrocatalysts still mainly rely on costly substance or fabrication process,which greatly restrict their large-scale *** this work,a simple fabricated FeS2 electrode is adopted as NRR *** abundant surface defects due to the existence of Cr element,as well as the synergistic effect between FeS2 crystal planes provided excellent electrocatalytic performance with a high NH3 yield rate(11.5μg h^-1mg^-1 Fe)and Faradaic efficiency(14.6%)at-0.2 V *** hydrogen electrode(RHE)toward NRR under ambient *** superior catalytic performance of such non-precious metal catalysts would strongly promote the application of NRR process industrially.

关键词： Surface defects Electrocatalysis Ammonia synthesis

Surface and interface chemistry in metal‐free electrocatalysts for electrochemical CO_(2) reduction

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Smartmat 2022年第1期3卷 5-34页

作者： Wei Zhang Baohua Jia Xue Liu tianyi ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced MaterialsCollege of ChemistryLiaoning UniversityShenyangLiao NingChina Centre for Translational Atomaterials Swinburne University of TechnologyHawthornVictoriaAustralia The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced materials(SEAM) Swinburne University of TechnologyHawthornVictoriaAustralia School of Science RMIT UniversityMelbourneVictoriaAustralia

The electrochemical reduction of carbon dioxide(CO_(2))into value‐added fuels and chemicals presents a sustainable route to alleviate CO_(2) emissions,promote carbon‐neutral cycles and reduce the dependence on fossil *** the thermodynamic stability of the CO_(2) molecule and sluggish reaction kinetics,it is still a challenge to design highly efficient electrocatalysts for the CO_(2) reduction reaction(CO_(2)RR).It has been found that the surface and interface chemistry of electrocatalysts can modulate the electronic structure and increase the active sites,which is favorable for CO_(2) adsorption,electron transfer,mass transport,and optimizing adsorption strength of reaction ***,the effect of surface and interface chemistry on metal‐free electrocatalysts(MFEs)for CO_(2)RR has not been comprehensively ***,we discuss the importance of the surface and interface chemistry on MFEs for improving the electrochemical CO_(2)RR performance based on thermodynamic and kinetic *** fundamentals and challenges of CO_(2)RR are firstly ***,the recent advances of the surface and interface chemistry in improving reaction rate and overcoming reaction constraints are reviewed from regulating electronic structure,active sites,electron transfer,mass transport,and intermediate binding ***,the research challenges and prospects are proposed to suggest the future designs of advanced MFEs in CO_(2)RR.

关键词： electrochemical CO_(2)reduction reaction metal‐free electrocatalysts surface and interface chemistry

S, N co-doped carbon nanotube-encapsulated core-shelled CoS2@Co nanoparticles： efficient and stable bifunctional catalysts for overall water splitting

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Science Bulletin 2018年第17期63卷 1130-1140页

作者： Jing-Yu Wang Ting Ouyang Nan Li tianyi ma Zhao-Qing Liu School of Chemistry and Chemical Engineering/Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education Guangzhou UniversityGuangzhou 510006 China Discipline of Chemistry University of Newcastle Newcastle NSW 2308 Australia School of Chemical Engineering University of Adelaide Adelaide SA 5005 Australia

Hydrogen, serving as a clean, sustainable energy source, may be mainly produced from electrolysis water. Herein, we report cobalt disulphide encapsulated in self-catalyzed carbon nanotubes （S, N-CNTs/ CoS2@Co） serving as a bifunctional catalyst, which exhibits excellent hydrogen evolution reaction perfor-mance （10.0 macm^-2 at 0.112 V, and low Tafel slope for 104.9 mV dec^-1 ） and oxygen evolution reaction performance （10.0 macm^-2 at 1.57 V, and low Tafel slope for 76.1 mV dec^-1）, meanwbile with a strong stability at various current densities. In-depth study reveals that the excellent catalytic properties can be mainly attributed to the increased catalytic sites induced by S, N co-doping, the improved electronic con-ductivity derived from the carbon nanotubes, and Mott-Schottky effect between the metal cobalt and semiconductive cobalt disulfide. Notably, when the bifunctional catalysts are applied to overall water splitting, a low potential of 1.633 V at the current density of 10.0 macm^-2 is achieved, which can com-pete with the precious metal catalyst benchmarks in alkaline media, demonstrating its promising prac-ticability in the realistic water splitting application. This work elucidates a practicable way to the design of transition metal and nano-carbon composite catalysts for a broad application in the fields of energy chemistry.

关键词： Core-shell structure Hydrogen evolution Oxygen evolution Bifunctional catalyst Overall water splitting

Mechanism of Capacity Fading Caused by Mn(Ⅱ)Deposition on Anodes for Spinel Lithium manganese Oxide Cell

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Journal of Wuhan University of Technology(materials Science) 2017年第1期32卷 1-10页

作者：陈海辉 ma tianyi ZENG Yingying GUO Xiuyan 邱新平 College of Chemistry&Chemical Engineering Jinggangshan UniversityJi'An 343009China Department of Chemistry Tsinghua UniversityBeijing 100008China School of Mechanical&Electrical Engineering Jinggangshan UniversityJi'an 343009China

The capacity fade of spinel lithium manganese oxide in lithium-ion batteries is a bottleneck challenge for the large-scale *** traditional opinion is that Mn（Ⅱ） ions in the anode are reduced to the metallic manganese that helps for catalyzing electrolyte *** could poison and damage the solid electrolyte interface（SEI） film,leading to the the capacity fade in Li-ion *** propose a new mechanism that Mn（Ⅱ） deposites at the anode hinders and/or blocks the intercalation/de-intercalation of lithium ions,which leads to the capacity fade in Li-ion *** on the new mechanism assumption,a kind of new structure with core-shell characteristic is designed to inhabit manganese ion dissolution,thus improving electrochemical cycle performance of the *** the way,this mechanism hypothesis is also supported by the results of these *** LiMn2-xTixO4 shell layer enhances cathode resistance to corrosion attack and effectively suppresses dissolution of Mn,then improves battery cycle performance with LiMn_2O_4 cathode,even at high rate and elevated temperature.

关键词： capacity fade manganese deposition lithium manganese oxide core-shell structure

Electrocatalytic CO_(2) reduction towards industrial applications

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Carbon Energy 2023年第1期5卷 154-180页

作者： Dezhi Xu Kangkang Li Baohua Jia Wenping Sun Wei Zhang Xue Liu tianyi ma Liaoning Province Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced materials Liaoning UniversityShenyangLiaoningPR China CSIRO Energy Mayfield WestNew South WalesAustralia College of Engineering Peking UniversityBeijingChina School of Science RMIT UniversityMelbourneVictoriaAustralia School of materials Science and Engineering State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhouZhejiangPR China

Recently,research on the electrocatalytic CO_(2) reduction reaction(eCO_(2)RR)has attracted considerable attention due to its potential to resolve environmental problems caused by CO_(2) while utilizing clean energy and producing high‐value‐added *** theoretical research in the lab has demonstrated its feasibility and ***,industrialization is mandatory to realize the economic and social value of eCO_(2)*** industrial application of eCO_(2)RR,more criteria have been proposed for eCO_(2)RR research,including high current density(above 200 ma cm^(−2)),high product selectivity(above 90%),and long‐term *** fulfill these criteria,the eCO_(2)RR system needs to be systematically designed and *** this review,recent research on eCO_(2)RR for industrial applications is *** review starts with focus on potential industrial catalysts in eCO_(2)***,potential industrial products are proposed in eCO_(2)*** products,including carbon monoxide,formic acid,ethylene,and ethanol,all have high market demand,and have shown high current density and product selectivity in theoretical ***,the innovative components and strategy for industrializing the eCO_(2)RR system are also highlighted here,including flow cells,seawater electrolytes,solid electrolytes,and a two‐step ***,some instructions and possible future avenues are presented for the prospects of future industrial application of eCO_(2)RR.

关键词： carbon dioxide reduction carbon neutral electrocatalysis industrial application

Integrated Electrode-Electrolyte Optimization to manufacture a Real-Life Applicable Aqueous Supercapacitor with Record-Breaking Lifespan

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Energy & Environmental materials 2023年第4期6卷 78-88页

作者： Jichi Liu Chongchong Wu Ian D.Gates Baohua Jia Zihang Huang tianyi ma Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced materials of Liaoning Province College of ChemistryInstitute of Clean Energy ChemistryLiaoning UniversityShenyang 110036China CNOOC Institute of Chemicals and Advanced materials Beijing 102200China Department of Chemical and Petroleum Engineering University of CalgaryCalgaryT2N1N4AB Canada School of Science RMIT UniversityMelbourne VIC 3000Australia

Aqueous supercapacitors(SCs)have been regarded as a promising candidate for commercial energy storage device due to their superior safety,low cost,and environmental ***,an age-old challenge of achieving both long electrode lifespan and qualified energy-storage property blocks their practical ***,we develop an electrode-electrolyte integrated optimization strategy to fulfill the real-life device *** optimization simultaneously regulates the nanomorphology and surface chemistry of the tungsten oxide anode,resulting in superior electrochemical performance given by an ideal“bird-nest”structure with optimal oxygen vacancy status;the anodes interact with and are protected from dissolution and structural collapse by the rationally designed hybrid electrolyte with optimized pH and facilitated cation desorption ***,a record-breaking durability of no capacitive decay after 250000 cycles is *** the basis of this integrated optimization,the first aqueous pouch SCs with real-life practicability were manufactured by a soft-package encapsulation technique,which can steadily power commercial 3 C products such as tablets and smartphones and maintain safely working against extreme *** work demonstrates the possibility of using aqueous energy storage devices with enhanced safety and lower cost to replace the commercial organic counterparts for wide range of daily applications.

关键词： integrated electrode-electrolyte optimization real-life applicable supercapacitor record-breaking lifespan