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CURRENT OSCILLATION DURING OXIDATION OF formic acid ON Pt/SbadELECTRODE

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Progress in Natural Science:Materials International 1992年第4期 351-358页

作者：孙世刚林岩 PRC State Key Lahoratory Physical Chemistry of the Solid Surface Department of Chemistry Xiamen 361005 Xiamen University

Pt electrode modified by Sb adatoms often exhibits high activity for electrocatalytic oxidation offormic *** the present paper,a sustained current oscillation of HCOOH oxidation at relatively highfrequency(10 to 27 Hz)is observed for the first time in an acid solution(pH=1),at potentials between0.29 and 0.40 V/SCE and (?)Sbwithin the range of 0.75—*** behavior has been studied bycombining electrochemical and in situ FTIR spectroscopic *** electrocatalytic mechanism of sur-faces is suggested and is successful in describing the oxidation of HCOOH on Pt/Sbadelectrodes.

关键词： current oscillation formic acid electrocatalytic oxidation Pt/Sbadelectrode

Structural Changes of Wheat Straw Lignin during formic acid Treatment

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Paper And Biomaterials 2016年第2期1卷 16-22页

作者： RuiXue Dong XiuWen Mei Chang Ma MingFei Li YongMing Fan MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy Beijing Forestry University Beifing 100083 China Beijing Key Laboratory of Lignocellulosic Chemistry Key Laboratory of Lignocellulosic ChemistryBeijing Forestry University Beijing 100083 China

The aromatic nature of lignin makes it a potential renewable source of chemicals and other valuable *** of lignin from lignocellulosic biomass using organic solvents enables the production of high-purity *** use of formic acid in the organosolv pulping and fractionation process has been widely *** of lignin is necessary to achieve valueadded applications of *** simplify the isolation of formic acid-treated lignin,herein,milled wheat straw lignin(MWSL) was employed as an archetype for characterization of the structural changes of lignin during formic acid *** results showed that the MWSL was GSH-type(comprising p-hydroxyphenyl(H),guaiacyl(G),and syringyl(S) monolignols) and underwent structural changes during formic acid *** was esterified during the formic acid *** content of alkyl hydroxyl groups in lignin decreased upon formic acid treatment,corresponding to an increase of the number of double bond equivalents(DBE).Lignin units with active reaction sites were liable to slight condensation,which resulted in a moderate increase of the molecular *** molecular weight distribution of formic acid-treated MWSL(FMWSL) was wider than that of the MWSL,although the molecular weight of both species did not differ *** β-O-4 linkage in lignin was partially cleaved during formic acid treatment,resulting in the production of new phenolic *** improved the solubility of lignin in the cooking liquor and its reactivity for downstream applications.

关键词： formic acid wheat straw lignin structural characterization

Monodisperse CoA gP d Nanoparticles Assembled on Graphene for Efficient Hydrogen Generation from formic acid at Room Temperature

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Monodisperse CoA gP d Nanoparticles Assembled on Graphene fo...

无溶剂中性条件下分子I_2或Fe(NO_3)_3·9H_2O/NaI原位生成的I_2催化醇与甲酸甲酰化反应(英文)

中国化学会第九届全国无机化学学术会议

作者： Lan Yang Wei Luo Gongzhen Cheng College of Chemistry and Molecular Sciences Wuhan University

Monodisperse trimetallic Co Ag Pd alloy nanoparticles（NPs） were synthesized by a controlled co-reduction of cobalt（II） acetylacetonate, silver nitrate and palladium acetylacetonate in oleylamine at 90 ℃ using 2-methylpyridine borane as the reducing agents. This is the first time using amine borane as the reducing agent to synthesize non-noble metal contained monodisperse trimetallic alloy NPs at relatively low temperature. The 2.8 nm monodisperse Co Ag Pd NPs were further assembled on graphene by a simple solution-phase self-assembly method, and tested for catalytic dehydrogenation of formic acid at room temperature. The introducing of small amount of Co could significantly increase the catalytic activity of Ag Pd/graphene. The small amount of Co could change the electronic states of Pd surface, and further increasing their catalytic performance. The TOF value of Co1.6Ag62.2Pd36.2/graphene is 110 h-1, which is higher than most previously reported values.

关键词： hydrogen storage formic acid graphene monodisperse Co Ag Pd nanoparticles

来源： cnki会议评论

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催化学报 2011年第1期32卷 60-64页

作者： Rostami AMIN[a] Khazaei ARDESHIR[b] Alavi-Nik HEIDAR ALI[b] Toodeh-Roosta ZAHRA[b] [a] Department of Chemistry Faculty of Science University of Kurdistan Zip Cod 66177-15175 Sanandaj Iran[b] Faculty of Chemistry Bu-Ali Sina University Zip Cod 65178-38683 Hamadan Iran

Different alcohols were formylated by formic acid under solvent-free conditions in the presence of iodine as the catalyst with good-to-high yields at room temperature.I2 generated in situ from Fe(NO3)3·9H2O/NaI also catalyzed the formylation of the alcohols under solvent-free *** gives a green and efficient reaction at room temperature,in which the use of toxic and corrosive molecular I2 is avoided.

关键词： alcohol formic acid formylation iodine in situ iodine solvent-free

Numerical Method for Determination of Composition of Weak acid Mixtures by Potentiometric Titration

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Chemical Research in Chinese Universities 1993年第4期9卷 309-313页

作者： JIANG Ri-shan, CHANG Shu-Ian and WU Ji-shi (Department of Chemistry, Yanbian University, Yanji, 133002)

An equation describing the state of weak acid mixtures was derived from the relationships between mole balance and charge balance. The equation was solved with numerical method and the compositions of the acid mixtures were determined. The advantages of this treatment were demonstrated by analyzing binary mixtures of chloroacetic, formic and acetic acids.

关键词： Numerical method of titration Chloroacetic acid formic acid Acetic acid

Facile sol-gel preparation of high-entropy multielemental electrocatalysts for efficient oxidation of methanol and urea

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Nano Research 2022年第6期15卷 5014-5023页

作者： Talifhani Mushiana Mustafa Khan Muhammad Imran Abdullah Ning Zhang Mingming Ma Department of Chemistry University of Science and Technology of ChinaHefei 230026China School of Biology Food and EnvironmentHefei UniversityHefei 230022China

High-entropy multi-elemental(HEM)electrocatalysts present superior catalytic performance due to the efficient synergism of their *** electrocatalysts are usually prepared through hydrothermal reactions or calcination,which could generate undesired heterogeneous structures that hinder the exploration of the structure–property relationship of these HEM ***,we report a sol-gel method to synthesize homogeneous HEM electrocatalysts for electro-oxidation of methanol and urea(methanol oxidation reaction(MOR)and urea oxidation reaction(UOR)),through an acid-catalyzed gelation at room *** Ni as the primary component for MOR and UOR,Co can reduce the overpotentials,while Fe can increase the catalytic activities and *** and phosphate can tune the charge distribution in active sites and speed up the reaction kinetics through fast proton ***,the optimal Ni_(2)Fe_(0.5)Co_(0.5)-BP HEM catalyst demonstrates superior catalytic activity together with good durability and great resistance to CO *** addition,a direct methanol fuel cell with Ni_(2)Fe_(0.5)Co_(0.5)-BP electrode can not only provide power,but also produce formic acid with high yield and high Faraday *** work presents a simple strategy to prepare high-performance HEM electrocatalysts for fuel cells and production of valueadded chemicals.

关键词： catalytic oxidation reaction high-entropy multi-elemental electrocatalysts sol-gel formic acid

Artificial synthesis of polyesters at ambient condition via consecutive CO_(2)electrolysis and fermentation

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Nano Research 2024年第7期17卷 6016-6025页

作者： Guiru Zhang Ning Ji Shiheng Lyu Baoxin Ni Peng Shen Ke Ye Yuting Wang Xuheng Jiang Hai Zhang Xi Liu Yongcheng Wang Kun Jiang Department of Laboratory Medicine of The First Affiliated Hospital&Liangzhu Laboratory Zhejiang University School of MedicineHangzhou 310058China Interdisciplinary Research Center School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China In-situ Centre for Physical Sciences Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Electrochemically converting CO_(2)into value-added chemicals is a promising approach to mitigate anthropogenic carbon emissions,yet largely limited to short-chained C_(1)–C_(3)***,we demonstrate a tandem artificial synthesis of biodegradable polyhydroxybutyrate(PHB)plastic from CO_(2)building *** synthesis of defects-enriched Bi catalyst is firstly demonstrated by plasma bombardment and following in situ electrochemical reduction,which delivers a HCOOH Faradaic efficiency above 80%at tunable concentration from 2 to 250 mM,an energy efficiency up to 41%,and a single-pass carbon conversion efficiency up to 60%.Annular dark field and second electron microscopic analysis,density functional theory(DFT)calcualtions,coupled with H-type and solid-state electrolyzer assessments,point out the vital role of defective and/or stepped Bi surface sites in promoting CO_(2)-to-HCOOH ***,as-synthesized high-purity HCOOH is used as the sole carbon source for C-chain growth within microbial fermentation reactor with Ralstonia eutropha,where activated formate dehydrogenase and increased metabolites related to Calvin–Benson–Bassham cycle are found to be responsible for the enhanced polyester accumulation.

关键词： CO_(2)electrolysis Bi catalyst vacancy site formic acid fermentation

The configuration of Au^(δ+)-ZrO_(2)^(δ−)species induced activation enhances electrocatalytic CO_(2)to formate conversion

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Nano Research 2024年第7期17卷 6006-6015页

作者： Yongjian Jia Yadi Zhang Mengque Lin Yangyang Cheng Yanjie Xu National Engineering Research Center for Technology and Equipment of Environmental Deposition Lanzhou Jiaotong UniversityLanzhou 730070China Key Lab of Opt-Electronic Technology and Intelligent Control of Ministry of Education Lanzhou Jiaotong UniversityLanzhou 730070China School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023China

Electrochemical CO_(2)conversion into value-added chemicals is a promising technology to solve the greenhouse effect and recycle chemical ***,the electrochemical CO_(2)reduction reaction(e-CO_(2)RR)is seriously compromised by weak CO_(2)adsorption and a rough CO_(2)activation process based on the chemical inertness of the CO_(2)molecule and the formed fragile metal–C/O *** this paper,we designed and fabricated Au particles embedded in ZrO_(2).The configuration of Au particles being of positive charge and ZrO_(2)with negative charge is induced and generated by metal–support interactions(MSIs).As a result,Au/ZrO_(2)@C presents a big difference in the CO_(2)conversion compared with the known work,affording a formate yield of 112.5μmol·cm^(−2)·h^(−1)at−1.1 V *** hydrogen electrode(RHE),and a max formate Faradaic efficiency of up to 94.1%at−0.9 V *** superior performance was attributed to the activated Au–ZrO_(2)interface to form the Au^(δ+)*** insitu Fourier transform infrared(FTIR)spectroscopy and theoretical calculations show that the MSIs configuration can be inclined to the*OCO intermediate generation on Au^(δ+)species activating CO_(2)molecules and then accelerate the formation of the*OCHO intermediate in e-CO_(2)RR,thereby favoring the CO_(2)conversion to formate.

关键词： electrochemical CO_(2)reduction reaction(e-CO_(2)RR) Au_(δ+)species formic acid *OCHO intermediate metal-support interactions

Hydrogen-rich surface of MoC catalysts for efficient CO_(2) hydrogenation induced by a coupled hydrogen donator

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Nano Research 2024年第8期17卷 7762-7767页

作者： Dong Xu Si-Yuan Xia Qi-Yuan Li Jie-Sheng Chen Xin-Hao Li School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China

Direct CO_(2) hydrogenation offers an important strategy for promoting the global carbon balance,but high thermodynamic and kinetic stability of CO_(2) has restricted its applicability to only a handful of industrial ***,we introduce a proof-of-concept application of the electron-rich Pt surface to promote hydrogen donation for electron-rich MoC particles acting as hydrogen acceptors,thereby constructing hydrogen-rich surface of MoC active ***,the formed hydrogen-rich and electronrich surface could greatly decrease reaction activation energy to boost the efficient CO_(2) hydrogenation into formic acid over the MoC *** optimized MoC@NC/Pt-0.1(NC:nitrogen-doped carbon)catalyst exhibits a high turnover frequency(TOF)value of 1.2 h^(−1) at a lower temperature of 60℃and a TOF of 24.2 h^(−1) under standard reaction conditions widely used in the literature,exceeding 7 times of MoC@NC catalyst and surpassing the benchmark classical non-noble metal active center-based heterogeneous catalyst.

关键词： electron-rich Pt nanoparticles hydrogen donation hydrogen-rich MoC nanoparticles CO_(2) hydrogenation formic acid