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Sub-2 nm ultra-thin Bi_(2)O_(2)CO_(3)nanosheets with abundant Bi-O structures toward formic acid electrosynthesis over a wide potential window

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Nano Research 2022年第4期15卷 2919-2927页

作者： Yuhong Wang Bin Wang Wenjun Jiang Zailun Liu Jiangwei Zhang Lizhen Gao Wei Yao Qian Xuesen Laboratory of Space Technology China Academy of Space Technology104 Youyi RoadBeijing 100094China College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Dalian National Laboratory for Clean Energy&State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences(CAS)Dalian 116023China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences(CAS)Fuzhou 350002China

The electrocatalytic reduction of CO_(2)to HCOOH(ERC-HCOOH)is one of the most feasible ways to alleviate energy crisis and solve environmental ***,it remains a challenge for ERC-HCOOH to maintain excellent activity and selectivity in a wide potential ***,ultra-thin flower-like Bi_(2)O_(2)CO_(3)nanosheets(NSs)with abundant Bi-O structures were in situ synthesized on carbon paper via topological transformation and *** efficiency of HCOOH(FEHCOOH)reached 90%in a wide potential window(-1.5 to-1.8 V ***/AgCl).Significantly,excellent FEHCOOH(90%)and current density(47 mA·cm^(-2))were achieved at-1.8 V ***/*** X-ray absorption fine structure(XAFS)combined with density functional theory(DFT)calculation demonstrated that the excellent performance of Bi_(2)O_(2)CO_(3)NS was attributed to the abundant Bi-O structures,which was conducive to enhancing the adsorption of CO_(2)^(*)and OCHO^(*)intermediates and can effectively inhibit hydrogen *** excellent performance of Bi_(2)O_(2)CO_(3)NS over a wide potential window could provide new insights for the efficient electrocatalytic conversion of CO_(2).

关键词： CO_(2)reduction Bi_(2)O_(2)CO_(3)nanosheets Bi-O structures X-ray absorption fine structure wide potential window

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Cu/CdcO_(3)catalysts for efficient electrochemical CO_(2)reduction over the wide potential window

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Chinese Chemical Letters 2023年第12期34卷 323-327页

作者： Congwen Sun Jinhui Hao Bing Wei Meng Wu Hong Liu Yusong Xiong Bochen Hu Longhua Li Min Chen Weidong Shi School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China Schoolof Resource and EnvironmentalEngineering Jjilin Institute of Chemical Technology Jilin 32000Chin

High efficiency and low-cost catalyst-driven electrocatalytic CO_(2)reduction to CO production are of great significance for energy storage and *** severe competitive hydrogen evolution reaction occurs at large negative potential window limits the achievement of the target product from CO_(2)at high ***,we successfully prepared Cu_(x)/CdcO_(3)composite catalyst rich in interfaces,in which achieved high CO Faraday eficiency exceeded 90%in a wide potential window of 700 mV and highest value up to 97.9%at-0.90V *** excellent performance can be ascribed to the positive contribution of Cu_(x)/CdcO_(3),which maintains a suitable high local pH value during electrochemical reduction,thus inhibiting the competitive hydrogen evolution ***,the compact structure between Cu and CdCO_(3)ensures fast electron transfer both inside catalysts and interface,thus speeding up the reaction kinetics of CO_(2)to CO *** calculations further prove that the combination of Cu and CdcO_(3)provides the well-defined electronic structure for intermediates adsorption,significantly reducing the reaction barrier for the formation of *** work provides new insights into the design of eficient electrochemical CO_(2)reduction catalysts for inhibiting hydrogen evolution by adjusting the local pH effect.

关键词： OH^(-) Local pH Inhibition of hydrogen evolution CO wide potential window

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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

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Preparation of safe water-lipid mixed electrolytes for application in ion capacitor

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Chinese Chemical Letters 2021年第6期32卷 2009-2012页

作者： Miaofeng Huang Aihua Tang Zhenyin Wang Jingkun Shi Xiaoping Jiang Chubin Wan Xin Ju University of Science and Technology Beijing Beijing 100083China Qilu University of Technology(Shandong Academy of Sciences) Ji'nan 250014China

Aqueous electrolytes are safe,economic,and environmentally ***,they have a narrow potential *** the other hand,organic electrolytes exhibit good thermodynamic stability but are inflammable and moisture *** this study,we prepared water-PEG-lipid ternary electrolytes(TEs).To combine the advantages of water,polyethylene glycol(PEG)and propylene carbonate(PC).The nonflammable mixed electrolytes exhibited a wide potential window of about 2.8 V due to the beneficial effects of PEG and *** these TEs,a lithium manganate-active carbon ion capacitor could be operated at 2.4 V with an energy density of 32 Wh/kg,based on the total active electrode material(current density of 3.3 m A/cm^(2)).This value was significantly higher than that achieved using an aqueous electrolyte,thereby rationalizing the higher energy density.

关键词： Safe electrolytes wide potential window Ion capacitor Moisture tolerant Ternary electrolyte Water-lipid mixed

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Fabrication of high Li:water molar ratio electrolytes for lithium-ion batteries

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Chinese Chemical Letters 2021年第2期32卷 834-837页

作者： Miaofeng Huang Jiajie Yang Siron Zhen Chubin Wan Xiaoping Jiang Xin Ju University of Science and Technology Beijing Beijing 100083China Qilu University of Technology Shandong Academy of SciencesJi'nan 250014China

Hydrous electrolytes with high electrochemical potentials were obtained by hydrating water molecules into solutes to form high Li:water molar ratio electrolytes(HMRE).Solid polyethylene glycol(PEG) were e mployed to enha nce the molar ratio of Li^(+) to water in the electrolytes while reducing the consumption of *** obtained mole ratio of Li^(+) to wa ter molecules in the hydrous electrolytes was greater than 1:1;however,the mass fraction of Li-salt was reduced to 61%(approximately 5.5 mol/kg,based on water and PEG).Compared with that of water-in-salt electrolytes,the mass fraction of Li-salt could be remarkably reduced by adding solid *** electrochemical stability of the electrolytes improved considerably because of the strong hydration of Li^(+) by the water molecules.A beneficial passivation effect,arising from the decomposition of the electrolyte,at a wide potential window was observed.

关键词： Aqueous electrolyte wide potential window Aqueous Li-ion battery Solid electrolyte interface Water-in-salt electrolytes

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Bimetallic In_(2)O_(3)/Bi_(2)O_(3) Catalysts Enable Highly Selective CO_(2) Electroreduction to Formate within Ultra-Broad potential windows

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Energy & Environmental Materials 2024年第1期7卷 257-264页

作者： Zhongxue Yang Hongzhi Wang Xinze Bi Xiaojie Tan Yuezhu Zhao Wenhang Wang Yecheng Zou Huai ping Wang Hui Ning Mingbo Wu State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringCollege of New EnergyChina University of Petroleum(East China)Qingdao 266580China Shandong Dongyue Future Hydrogen Energy Material Co. Ltd.Zibo 255000China

CO_(2)electrochemical reduction reaction(CO_(2)RR)to formate is a hopeful pathway for reducing CO_(2)and producing high-value chemicals,which needs highly selective catalysts with ultra-broad potential windows to meet the industrial ***,the nanorod-like bimetallic ln_(2)O_(3)/Bi_(2)O_(3)catalysts were successfully synthesized by pyrolysis of bimetallic InBi-MOF *** abundant oxygen vacancies generated from the lattice mismatch of Bi_(2)O_(3)and ln_(2)O_(3)reduced the activation energy of CO_(2)to*CO_(2)·^(-)and improved the selectivity of*CO_(2)·^(-)to formate ***,the carbon skeleton derived from the pyrolysis of organic framework of InBi-MOF provided a conductive network to accelerate the electrons *** catalyst exhibited an ultra-broad applied potential window of 1200 mV(from-0.4 to-1.6 V vs RHE),relativistic high Faradaic efficiency of formate(99.92%)and satisfactory stability after 30 *** in situ FT-IR experiment and DFT calculation verified that the abundant oxygen vacancies on the surface of catalysts can easily absorb CO_(2)molecules,and oxygen vacancy path is dominant *** work provides a convenient method to construct high-performance bimetallic catalysts for the industrial application of CO_(2)RR.

关键词： bimetallic catalyst CO_(2)electrochemical reduction reaction formate oxygen vacancy wide potential window

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