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1. A mechanistic study of B₃₆-supported atomic Au promoted CO₂ electroreduction to formic acid

Author:
Li, Wen-Ying; Zhao, Xiang; Dang, Jing-Shuang
Source:
Journal of materials chemistry A 2019 v.7 no.23 pp. 13935-13940
ISSN:
2050-7496
Subject:
formic acid,   etc   ; carbon dioxide; catalysts; electrochemistry; gold;     Show all 5 Subjects
Abstract:
... We introduce a single-atom catalyst in which atomic gold resides in the corner sites of a recently discovered B₃₆ cluster. By means of quantum chemistry calculations, we propose that B₃₆Au is capable of adsorbing CO₂ and promoting a highly active and selective CO₂ reduction process to form HCOOH, with a tiny electrochemical limiting potential of −0.08 V. ...
DOI:
10.1039/c9ta03983j

2. Carbonylative Transformation of Allylarenes with CO Surrogates: Tunable Synthesis of 4-Arylbutanoic Acids, 2-Arylbutanoic Acids, and 4-Arylbutanals

Author:
Wu, Fu-Peng; Li, Da; Peng, Jin-Bao; Wu, Xiao-Feng
Source:
Organic letters 2019 v.21 no.14 pp. 5699-5703
ISSN:
1523-7052
Subject:
formic acid,   etc   ; carbon monoxide; chemical reactions; chemical structure;     Show all 4 Subjects
Abstract:
... In this Communication, procedures for the selective synthesis of 4-arylbutanoic acids, 2-arylbutanoic acids, and 4-arylbutanals from the same allylbenzenes have been developed. With formic acid or TFBen as the CO surrogate, reactions proceed selectively and effectively under carbon monoxide gas-free conditions. ...
DOI:
10.1021/acs.orglett.9b02047

3. Biological Safety Studies and Simultaneous Determination of Linagliptin and Synthetic Impurities by LC-PDA

Author:
Heleno Ferreira, Raquel Balestri; Duarte, Jonathaline Apollo; Ferreira, Flávio Dias; Oliveira, Luis Flávio Souza de; Machado, Michel Mansur; Malesuik, Marcelo Donadel; Paula, Fávero Reisdorfer; Steppe, Martin; Schapoval, Elfrides Eva Shermann; Paim, Clésio Soldateli
Source:
Journal of Analytical Methods in Chemistry (Online) 2019 v.2019
ISSN:
2090-8873
Subject:
formic acid,   etc   ; acetonitrile; chromatography; guidelines; pH; prediction; toxicity;     Show all 7 Subjects
Abstract:
... A stability-indicating LC method was developed for quantification of linagliptin (LGT) and three synthetic impurities. The method utilizes a Thermo Scientific® RP-8 column (100 mm × 4.6 mm; 5 μm) with the PDA detector for quantitation of impurities. A mixture of 0.1% formic acid with pH 3.5 (A) and acetonitrile (B) was used as the mobile phase at a flow rate of 0.6 mL·min⁻¹ with gradient elution. ...
DOI:
10.1155/2019/7534609

4. One-dimensional chain structures of hexanuclear uranium(iv) clusters bridged by formate ligands

Author:
Ling, Jie; Lu, Huangjie; Wang, Yaxing; Johnson, Kenndra; Wang, Shuao
Source:
RSC advances 2018 v.8 no.61 pp. 34947-34953
ISSN:
2046-2069
Subject:
formic acid,   etc   ; formates; ligands; magnetism; pyridines; uranium;     Show all 6 Subjects
Abstract:
... Three one-dimensional chain structures of uranium(iv) hexanuclear clusters have been synthesized under hydrothermal/solvothermal conditions. Crystallographic studies disclose that the structures of [U₆O₄(OH)₄(HCOO)₁₂(H₂O)]·3H₂O (1a), [U₆O₄(OH)₄(HCOO)₁₂(HCOOH)(H₂O)]·3H₂O (1b) and (H₆C₅N)₂[U₆O₄(OH)₄(HCOO)₁₄(H₅C₅N)] (2) contain a U(iv) hexanulear core [U₆(μ₃-OH)₄(μ₃-O)₄]¹²⁺ which is decorated by term ...
DOI:
10.1039/c8ra06330c

5. PtAl truncated octahedron nanocrystals for improved formic acid electrooxidation

Author:
XiongThese authors contributed equally to this work., Yu; Xin, Pingyu; Chen, Wenxing; Wang, Yu; Zhang, Shaolong; Ren, Hanlin; Rong, Hongpan; Zheng, Xusheng; Chen, Chen; Peng, Qing; Wang, Dingsheng; Li, Yadong
Source:
Chemical communications 2018 v.54 no.32 pp. 3951-3954
ISSN:
1364-548X
Subject:
formic acid,   etc   ; alloys; aluminum; chemical reactions; nanocrystals;     Show all 5 Subjects
Abstract:
... We successfully obtained truncated octahedron PtAl alloy nanocrystals (∼10 nm) via a facile one-pot strategy. The PtAl nanocrystals exhibited enhanced activity in formic acid electrooxidation compared to commercial Pt/C, which could be ascribed to the large density of defects on the surface as well as the synergy between Pt and Al. ...
DOI:
10.1039/c8cc00970h

6. One-pot fabrication of N-doped graphene supported dandelion-like PtRu nanocrystals as efficient and robust electrocatalysts towards formic acid oxidation

Author:
Xu, Hui; Yan, Bo; Li, Shumin; Wang, Jin; Wang, Caiqin; Guo, Jun; Du, Yukou
Source:
Journal of colloid and interface science 2018 v.512 pp. 96-104
ISSN:
0021-9797
Subject:
formic acid,   etc   ; fuel cells; graphene; nanocrystals; oxidation;     Show all 5 Subjects
Abstract:
... Engineering the architectures of metal nanocatalysts offers a valid approach for the development of electrocatalysts with greatly enhanced performances. Herein, we report the one-pot method to successfully fabricate the N-doped graphene (NG) supported dandelion-like PtRu nanocrystals. Such dandelion-like nanocrystals with different compositions can be readily tuned via the addition of different am ...
DOI:
10.1016/j.jcis.2017.10.049

7. Formic acid: an accelerator and quality promoter for nonseeded growth of CH₃NH₃PbI₃ single crystals

Author:
Lv, Qianrui; Lian, Zhipeng; Li, Qiang; Sun, Jia-Lin; Yan, Qingfeng
Source:
Chemical communications 2018 v.54 no.9 pp. 1049-1052
ISSN:
1364-548X
Subject:
formic acid,   etc   ; X-radiation; crystals; ions; oxidation;     Show all 5 Subjects
Abstract:
... With the aid of formic acid, CH₃NH₃PbI₃ single crystal of 9 mm in length was directly harvested within 3 days via a nonseeded solution temperature-lowering (STL) method. It showed a record-narrow full width at half maximum of 13 arcsec for the high-resolution X-ray rocking curve, a low trap-state density of 3.1 × 10⁹ cm⁻³, a high carrier mobility of 162 cm² V⁻¹ s⁻¹ and high moisture stability. The ...
DOI:
10.1039/c7cc07154j

8. Ultrathin Pt–Zn Nanowires: High-Performance Catalysts for Electrooxidation of Methanol and Formic Acid

Author:
Pei, Jiajing; Mao, Junjie; Liang, Xin; Zhuang, Zhongbin; Chen, Chen; Peng, Qing; Wang, Dingsheng; Li, Yadong
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.1 pp. 77-81
ISSN:
2168-0485
Subject:
formic acid,   etc   ; catalysts; methanol; nanowires; solvents; zinc;     Show all 6 Subjects
Abstract:
... Herein, we have developed a Zn²⁺ ion induced reduction strategy (ZIRS) for synthesizing ultrathin Pt–Zn nanowires (NWs) with average size of ∼2.2 nm. The precise selection of solvent and the addition of ZnCl₂ precursor are of crucial significance to preparing bimetallic NWs. The NWs exhibited electrocatalytic performance compared with commercial catalysts, such as electrooxidation of methanol (MOR ...
DOI:
10.1021/acssuschemeng.7b03234

9. Investigation into reversed phase chromatography peptide separation systems part II: An evaluation of the robustness of a protocol for column characterisation

Author:
Field, Jennifer K.; Euerby, Melvin R.; Petersson, Patrik
Source:
Journal of chromatography 2019 v.1603 pp. 102-112
ISSN:
0021-9673
Subject:
formic acid,   etc   ; acetonitrile; formates; pH; peptides; reversed-phase liquid chromatography; solvents; temperature;     Show all 8 Subjects
Abstract:
... The robustness of the Peptide Reversed Phase Chromatography (RPC) Column Characterisation Protocol was evaluated using reduced factorial design, to ascertain the degree of control required for parameters including temperature, flow rate, dwell volume, a systematic shift in the gradient, amount of formic acid in the aqueous and organic, pH of the ammonium formate and amount of acetonitrile (%MeCN) ...
DOI:
10.1016/j.chroma.2019.05.037

10. Aldehyde as a potential source of aminol in troposphere: Influence of water and formic acid catalysis on ammonolysis of formaldehyde

Author:
Sarkar, Saptarshi; Monu,; Bandyopadhyay, Biman
Source:
Atmospheric environment 2019 v.213 pp. 223-230
ISSN:
1352-2310
Subject:
formic acid,   etc   ; activation energy; altitude; ammonia; atmospheric chemistry; catalysts; catalytic activity; formaldehyde; reaction kinetics; temperature; troposphere;     Show all 11 Subjects
Abstract:
... Formation of 1-aminomethanol in troposphere through the reaction between formaldehyde and ammonia has been investigated by means of electronic structure and chemical kinetics calculations employing CCSD(T)/CBS//MP2/aug-cc-pVTZ level of theory. The process is not favorable under tropospheric conditions due to high reaction barrier (30.4 kcal mol−1) and very low rate coefficient (1.7×10−34 cm3 molec ...
DOI:
10.1016/j.atmosenv.2019.05.069

11. Capturing hemoglobin on graphene sheet from sub-microliter whole blood for quantitative characterization by internal extractive electrospray ionization mass spectrometry

Author:
Song, Lili; Chen, Huanwen; Ma, Mingyuan; Liu, Zhiwen; Jie, Feifan; Lan, Liqun; Hua, Rong; Wang, Shuanglong
Source:
Talanta 2019 v.202 pp. 436-442
ISSN:
0039-9140
Subject:
formic acid,   etc   ; blood; blood sampling; electrospray ionization mass spectrometry; graphene; hemoglobin; ions; standard deviation; wastes;     Show all 9 Subjects
Abstract:
... A disposable blood sampler, which is consisted of a sub-microliter whole blood collector and a graphene filter, loading graphene sheet to selectively capture hemoglobin from sub-microliter whole blood, was developed for both qualitative and quantitative characterization hemoglobin by internal extractive electrospray ionization mass spectrometry (iEESI-MS). The blood collector was elegantly fabrica ...
DOI:
10.1016/j.talanta.2019.04.069

12. Quantification of adefovir and pitavastatin in human plasma and urine by LC-MS/MS: A useful tool for drug-drug interaction studies

Author:
Scherf-Clavel, Oliver; Kinzig, Martina; Stoffel, Marc S.; Fuhr, Uwe; Sörgel, Fritz
Source:
Journal of chromatography 2019 v.1125 pp. 121718
ISSN:
1570-0232
Subject:
formic acid,   etc   ; acetonitrile; drug interactions; liquid chromatography; mass spectrometry; methanol; regression analysis; urine;     Show all 8 Subjects
Abstract:
... As a tool to be used in transporter-mediated drug-drug interaction studies, a sensitive LC-MS/MS method for the simultaneous quantification of adefovir and pitavastatin in human plasma and adefovir in urine was developed and successfully validated. Plasma samples were processed by protein precipitation using methanol with a subsequent concentrating step. Urine samples were diluted using 0.1% formi ...
DOI:
10.1016/j.jchromb.2019.121718

13. Nuclear-targeted of TAT peptide-conjugated carbon dots for both one-and two-photon fluorescence imaging

Author:
Song, Yukun; Li, Xintong; Cong, Shuang; Zhao, Haidong; Tan, Mingqian
Source:
Colloids and surfaces 2019 v.180 pp. 449-456
ISSN:
0927-7765
Subject:
formic acid,   etc   ; carbon quantum dots; fluorescence; fluorescent dyes; image analysis; peptides; photons; transactivators; tryptophan; wavelengths;     Show all 10 Subjects
Abstract:
... Carbon dots (CDs) with both one- and two-photon fluorescence have attracted much attention in the field of bioimaging. In this study, we reported a strategy for the design of peptide-conjugated CDs for cellular nuclear-targeted imaging. The CDs were prepared from amino acid and formic acid via an one-step hydrothermal synthesis method, and then modified with trans-activator of transcription (TAT) ...
DOI:
10.1016/j.colsurfb.2019.05.015

14. Cooperative defect-enriched SiO2 for oxygen activation and organic dehydrogenation

Author:
Saputera, Wibawa Hendra; Tahini, Hassan A.; Lovell, Emma C.; Tan, Tze Hao; Rawal, Aditya; Aguey-Zinsou, Kondo-Francois; Friedmann, Donia; Smith, Sean C.; Amal, Rose; Scott, Jason
Source:
Journal of catalysis 2019 v.376 pp. 168-179
ISSN:
0021-9517
Subject:
formic acid,   etc   ; catalytic activity; dehydrogenation; energy; engineering; hydrogenation; oxidation; oxygen; silica; synergism; ultraviolet radiation;     Show all 11 Subjects
Abstract:
... Tailoring oxide functionalities via defect engineering is an effective approach in many advanced materials. Here we report that introducing defect sites in SiO2 via sequential hydrogenation and UV light pre-treatment steps can invoke synergism for oxygen activation and organic dehydrogenation under ambient conditions in the absence of light. The hydrogenation step is proposed to break SiOSi bonds ...
DOI:
10.1016/j.jcat.2019.07.006

15. The experimental and theoretical insights towards the CO induced Pd-Graphene and their multifunctional energy conversion applications

Author:
Das, Sushanta K.; Chandra Sahu, Subash; Ghosh, Arnab; Basu, Suddhasatwa; Chakraborty, Brahmananda; Jena, Bikash Kumar
Source:
Carbon 2019 v.149 pp. 307-317
ISSN:
0008-6223
Subject:
formic acid,   etc   ; carbon monoxide; electrochemistry; energy conversion; graphene; graphene oxide; methanol; molecular dynamics; nanomaterials; oxidation; palladium;     Show all 11 Subjects
Abstract:
... Here, CO gas environment has been used for reduction of graphene oxide (GO) and Pd precursor for preparation of varieties of Pd Nanostructures (PdNSs) with different shapes, size and surface morphologies on graphene support (RG-PdNSs). The extensive ab-initio Molecular Dynamics (MD) simulations and electronic structure calculations have been carried to get theoretical insight for the reduction pro ...
DOI:
10.1016/j.carbon.2019.03.093

16. Analysis of oligonucleotides by ion-pair reversed-phase liquid chromatography coupled with positive mode electrospray ionization mass spectrometry

Author:
Weng, Guofeng; Sun, Binwen; Liu, Zheyi; Wang, Fangjun; Pan, Yuanjiang
Source:
Analytical and bioanalytical chemistry 2019 v.411 no.18 pp. 4167-4173
ISSN:
1618-2642
Subject:
formic acid,   etc   ; electrospray ionization mass spectrometry; energy; hydrolysates; oligonucleotides; reversed-phase liquid chromatography; sequence analysis; triethylamine;     Show all 8 Subjects
Abstract:
... Oligonucleotides are usually analyzed by ion-pair reversed-phase liquid chromatography (IP-RPLC) coupled with negative mode electrospray ionization mass spectrometry (ESI-MS) due to their highly negative charged phosphodiester backbones. Herein, the signal suppression effect of triethylamine (TEA) adducts caused the ion-pair reagent TEA/hexafluoroisopropanol (HFIP) is greatly alleviated after impr ...
DOI:
10.1007/s00216-019-01819-w

17. Enhanced photocatalytic CO2 reduction and 2,4-dichlorophenol degradation of TiO2 nanotubes via bi-directionally controlling electrons and holes

Author:
Wu, Jing; Tian, Yan; Li, Da; Han, Xiaoyu; Liu, Jia; Feng, Yujie
Source:
Chemosphere 2019 v.226 pp. 704-714
ISSN:
0045-6535
Subject:
formic acid,   etc   ; 2,4-dichlorophenol; acetic acid; carbon dioxide; electrochemistry; electrons; manganese oxides; nanotubes; photocatalysis; titanium dioxide;     Show all 10 Subjects
Abstract:
... In this study, TiO2 nanotubes (TiNTs) co-modified with MnOx (Mn) and reduced-graphene-oxide (RGO) were prepared by a simple electrochemical deposition process. The photocatalytic activities for reducing CO2 and degradating 2,4-dichlorophenol of TiNTs were enhanced after co-modification with proper amounts of MnOx and RGO. The yields of acetic acid and formic acid of the amount-optimized TiNTs (6RG ...
DOI:
10.1016/j.chemosphere.2019.03.149

18. New bioproduction systems for chemicals and fuels: Needs and new development

Author:
Zeng, An-Ping
Source:
Biotechnology advances 2019 v.37 no.4 pp. 508-518
ISSN:
0734-9750
Subject:
formic acid,   etc   ; affordability; bioeconomics; biorefining; biosynthesis; carbon; carbon dioxide; carbon monoxide; electricity; feedstocks; fuels; methane; methanol;     Show all 13 Subjects
Abstract:
... Currently used bioproduction systems for chemicals and fuels are primarily based on sugar-containing substrates. They have inherent limitations regarding substrate sustainability and affordability, product spectrum and yield, and costs for up- and downstream processing. To overcome some of these major burdens new bioproduction strategies and systems are being developed, including biorefinery, elec ...
DOI:
10.1016/j.biotechadv.2019.01.003

19. Brønsted acidic ionic liquid catalyzed one-pot conversion of cellulose to furanic biocrude and identification of the products using LC-MS

Author:
Amarasekara, Ananda S.; Gutierrez Reyes, Cristian D.
Source:
Renewable energy 2019 v.136 pp. 352-357
ISSN:
0960-1481
Subject:
formic acid,   etc   ; acetone; biofuels; catalysts; cellulose; condensation reactions; hydroxymethylfurfural; ionic liquids; liquid chromatography; mass spectrometry; methanol;     Show all 11 Subjects
Abstract:
... The degradation of cellulose was studied using 1-(3-propylsulfonic)-3-methylimidazolium chloride and 1-(4-butylsulfonic)-3-methylimidazolium chloride acidic ionic liquids as catalysts in acetone at 120 °C for 3.5 h. The products were analyzed using LC-MS with a C18 column and 0.1% formic acid in water - methanol as the eluent solvent. Eleven cellulose degradation products were identified in the fu ...
DOI:
10.1016/j.renene.2018.12.108

20. Electrocatalytic reduction of CO₂ by two-dimensional transition metal porphyrin sheets

Author:
Liu, Jin-Hang; Yang, Li-Ming; Ganz, Eric
Source:
Journal of materials chemistry A 2019 v.7 no.19 pp. 11944-11952
ISSN:
2050-7496
Subject:
formic acid,   etc   ; carbon dioxide; carbon monoxide; catalysts; catalytic activity; density functional theory; electrochemistry; methane; porphyrins;     Show all 9 Subjects
Abstract:
... Looking for highly stable and efficient electrocatalysts for CO₂ reduction is quite crucial, but a big challenge in community. In this paper, the catalytic performance of the first transition metal series–porphyrin (TM–PP) monolayers as single atom catalysts for the electrochemical reduction of CO₂ has been studied using density functional theory. The results show that the TM–PP monolayers have ex ...
DOI:
10.1039/c9ta01188a