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1. The hidden story in BaNiO₃ to BaNiO₂ transformation: adaptive structural series and NiO exsolution

Author:
Arévalo-López, Angel M.; Huvé, Marielle; Simon, Pardis; Mentré, Olivier
Source:
Chemical communications 2019 v.55 no.26 pp. 3717-3720
ISSN:
1364-548X
Subject:
nickel; nickel oxide,   etc   ; chemical reactions; oxygen;     Show all 4 Subjects
Abstract:
... BaNiO₃ crystal to BaNiO₂ crystal transformation is reported. Contrary to an intuitive topochemical reduction, a two step reaction was observed. In the first step, NiO exsolution occurs and intermediate Ba₁₊ₓNiO₃ phases were obtained and isolated. A composite approach was used to solve the novel structure for x ∼ 1/6 with charge ordered Ni²⁺ and Ni⁴⁺. We argue that this NiO exsolution is responsibl ...
DOI:
10.1039/c8cc09610d

2. Photoelectrochemical properties of a well-structured 1.3 nm-thick pn junction crystal

Author:
Awaya, Keisuke; Takashiba, Akihide; Taniguchi, Takaaki; Koinuma, Michio; Ishihara, Tatsumi; Ida, Shintaro
Source:
Chemical communications 2019 v.55 no.31 pp. 4586-4588
ISSN:
1364-548X
Subject:
nickel,   etc   ; nanosheets; photooxidation;     Show all 3 Subjects
Abstract:
... A 1.3 nm-thick nickel hydroxide (p-type, 0.5 nm)/titania (n-type, 0.8 nm) pn junction prepared by lamination of nanosheets improved the onset potential for photoelectrochemical oxidation and increased the photooxidation current, indicating that ultrathin pn junctions suppress the recombination of photo-generated carriers. ...
DOI:
10.1039/c9cc01039d

3. Tunable Dipole Moment in Janus Single-Layer MoSSe via Transition-Metal Atom Adsorption

Author:
Tao, Shengdan; Xu, Bo; Shi, Jing; Zhong, Shuying; Lei, Xueling; Liu, Gang; Wu, Musheng
Source:
Journal of physical chemistry 2019 v.123 no.14 pp. 9059-9065
ISSN:
1932-7455
Subject:
nickel,   etc   ; adsorption; models;     Show all 3 Subjects
Abstract:
... Intrinsic dipole moment is an important characteristic of Janus single-layer MoSSe. Tuning the dipole moment would broaden the potential applications of Janus MoSSe in the field of piezoelectricity and molecular sensing. In this study, the dipole moments of Janus single-layer MoSSe with 3d transition-metal (TM) adatoms (Sc–Ni) are explored by using first-principles calculations. Our results demons ...
DOI:
10.1021/acs.jpcc.9b00421

4. Ferri- and ferro-magnetism in CaMnMReO₆ double double perovskites of late transition metals M = Co and Ni

Author:
Solana-Madruga, Elena; Sun, Yu; Arévalo-López, Ángel M.; Attfield, J. Paul
Source:
Chemical communications 2019 v.55 no.18 pp. 2605-2608
ISSN:
1364-548X
Subject:
nickel,   etc   ; chemical reactions; cobalt;     Show all 3 Subjects
Abstract:
... Two new double double perovskites of ideal compositions CaMnMReO₆ (M = Co, Ni) are reported. The M = Co material has refined composition CaMn₀.₇Co₁.₃ReO₆ and orders ferrimagnetically below TC = 188 K with a relatively large saturated magnetisation of 4.5 μB. The M = Ni product, CaMn₁.₂Ni₀.₈ReO₆, is a remarkable example of a ferromagnetic oxide with four distinct spin sublattices all collinearly or ...
DOI:
10.1039/c8cc09612k

5. A yolk-double-shelled heterostructure-based sensor for acetone detecting application

Author:
Zhang, Rui; Shi, Jiawen; Zhou, Tingting; Tu, Jinchun; Zhang, Tong
Source:
Journal of colloid and interface science 2019 v.539 pp. 490-496
ISSN:
0021-9797
Subject:
nickel; nickel oxide,   etc   ; acetone; electron transfer; zinc oxide;     Show all 5 Subjects
Abstract:
... A high-performance gas-sensing material combines the advantageous features of high specific area and fast electron transport. These features are heavily dependent on the engineered configuration design and interfacial construction of the material. Here, a synthesis method is presented which combines the two requirements by producing porous nickel oxide-zinc oxide (NiO-ZnO) hybrid yolk-double-shell ...
DOI:
10.1016/j.jcis.2018.12.096

6. Enhanced lithium storage capability enabled by metal nickel dotted NiO–graphene composites

Author:
Chen, Jin; Wang, Zhao; Mu, Jiechen; Ai, Bing; Zhang, Tiezhu; Ge, Wenqing; Zhang, Lipeng
Source:
Journal of materials science 2019 v.54 no.2 pp. 1475-1487
ISSN:
0022-2461
Subject:
nickel; nickel oxide,   etc   ; electrochemistry; electrodes; electrolytes; graphene; lithium; lithium batteries;     Show all 8 Subjects
Abstract:
... The electrochemical performance of Li-ion batteries, which is limited by large volume changes and low intrinsic conductivity, can be improved by using a NiO–graphene composite as an electrode. Herein, we constructed metallic Ni-dotted NiO flakes on folded graphene and evaluated the electrochemical performance of the resulting composites. Introduction of graphene produced an excellent 2D structure ...
DOI:
10.1007/s10853-018-2882-3

7. Effect of nickel coating on the stress-dependent electric permittivity, piezoelectricity and piezoresistivity of carbon fiber, with relevance to stress self-sensing

Author:
Xi, Xiang; Chung, D.D.L.
Source:
Carbon 2019 v.145 pp. 401-410
ISSN:
0008-6223
Subject:
nickel,   etc   ; carbon; carbon fibers; coatings;     Show all 4 Subjects
Abstract:
... This paper unprecedentedly reports the effect of metal (nickel) coating on the stress-dependent electric permittivity, piezoelectricity and piezoresistivity of carbon fiber. Both permittivity (2 kHz) and DC conductivity of carbon fiber are increased by nickel coating. For 7-μm diameter carbon fiber, nickel coating (0.25-μm thickness) increases the relative permittivity from 12,200 to 63,200, and d ...
DOI:
10.1016/j.carbon.2019.01.034

8. Asymmetric synthesis of (2S,3S)-3-Me-glutamine and (R)-allo-threonine derivatives proper for solid-phase peptide coupling

Author:
Tokairin, Yoshinori; Soloshonok, Vadim A.; Moriwaki, Hiroki; Konno, Hiroyuki
Source:
Amino acids 2019 v.51 no.3 pp. 419-432
ISSN:
0939-4451
Subject:
nickel,   etc   ; chemical reactions; cytotoxicity; peptides;     Show all 4 Subjects
Abstract:
... Practical new routes for preparation of (2S,3S)-3-Me-glutamine and (R)-allo-threonine derivatives, the key structural components of cytotoxic marine peptides callipeltin O and Q, suitable for the Fmoc-SPPS, were developed. (2S,3S)-Fmoc-3-Me-Gln(Xan)-OH was synthesized via Michael addition reactions of Ni (II) complex of chiral Gly-Schiff base; while Fmoc-(R)-allo-Thr-OH was prepared using chiral N ...
DOI:
10.1007/s00726-018-2677-5

9. Tripodal methanetrisulfonate ligands in the trinuclear complex {Ni₃[CH(SO₃)₃]₂(NMP)₈}

Author:
Gudenschwager, Marit; Christoffers, Jens; Wickleder, Mathias S.
Source:
Zeitschrift für Naturforschung 2019 v.74 no.1 pp. 27-31
ISSN:
1865-7117
Subject:
nickel,   etc   ; anions; ligands; thermal analysis;     Show all 4 Subjects
Abstract:
... The reaction of Ni(OH)₂ and methanetrisulfonic acid trihydrate CH(SO₃H)₃·3H₂O (H₃MTA·3H₂O) in N-methyl-pyrrolidone (NMP) leads to the trinuclear complex {Ni₃[MTA]₂(NMP)₈} (triclinic, P1̅, Z=1, a=946.25(3), b=1073.24(3), c=1518.27(4) pm, α=72.193(2), β=87.398(2), γ=89.389(2)°, V=1466.49(7)×10⁶ pm³). The structural features of the methanetrisulfonate anions are tripodal as well as chelating coordina ...
DOI:
10.1515/znb-2018-0152

10. Single-point calibration and standard addition assays on calibrant-loaded paper-based analytical devices

Author:
Giannoulas, George; Tsogas, George Z.; Giokas, Dimosthenis L.
Source:
Talanta 2019 v.201 pp. 149-155
ISSN:
0039-9140
Subject:
nickel,   etc   ; amino acids; color; colorimetry; iron; paper;     Show all 6 Subjects
Abstract:
... This article describes a new, simplified approach for performing quantitative colorimetric assays on paper-based analytical devices that uses calibrant-loaded paper devices to perform external calibration and standard addition calibration using one calibration point. Calibrant-loaded devices consist of sensing areas pre-loaded with a colored product which is produced from the reaction of a standar ...
DOI:
10.1016/j.talanta.2019.04.008

11. Recyclable nickel-catalyzed C–H/O–H dual functionalization of phenols with mandelic acids for the synthesis of 3-aryl benzofuran-2(3H)-ones under solvent-free conditions

Author:
Tang, Zhi; Tong, Zhou; Xu, Zhihui; Au, Chak-Tong; Qiu, Renhua; Yin, Shuang-Feng
Source:
Green chemistry 2019 v.21 no.8 pp. 2015-2022
ISSN:
1463-9270
Subject:
nickel,   etc   ; antioxidants; catalysts; green chemistry; phenols;     Show all 5 Subjects
Abstract:
... Herein, we developed a protocol for the efficient synthesis of 3-aryl benzofuran-2(3H)-ones under solvent-free conditions from phenols and mandelic acids using Ni(OTf)₂ as a catalyst. A diverse range of mandelic acids and phenols undergo C–H/O–H bond dual functionalization to generate products in moderate to good or excellent yields. The nickel catalyst can be easily recycled in a test of three ru ...
DOI:
10.1039/c9gc00305c

12. A nickel(ii)-catalyzed asymmetric intramolecular Alder-ene reaction of 1,7-dienes

Author:
Liu, Wen; Zhou, Pengfei; Lang, Jiawen; Dong, Shunxi; Liu, Xiaohua; Feng, Xiaoming
Source:
Chemical communications 2019 v.55 no.31 pp. 4479-4482
ISSN:
1364-548X
Subject:
nickel,   etc   ; alkenes; catalysts; diastereomerism; enantioselectivity; piperidines;     Show all 6 Subjects
Abstract:
... A highly diastereo- and enantioselective intramolecular Alder-ene reaction with an alkene as the enophile has been developed by using a chiral N,N′-dioxide/nickel(ii) complex as the catalyst. This protocol provides a facile route towards the synthesis of diverse 3,4-disubstituted chroman, tetrahydroquinoline, piperidine and thiochroman derivatives in high yields with good to excellent diastereo- a ...
DOI:
10.1039/c9cc01521c

13. An unprecedented {Ni₁₄SiW₉} hybrid polyoxometalate with high photocatalytic hydrogen evolution activity

Author:
PailleThese authors contributed equally to this work., Grégoire; Boulmier, Amandine; Bensaid, Alexandre; Ha-Thi, Minh-Huong; Tran, Thu-Trang; Pino, Thomas; Marrot, Jérôme; Rivière, Eric; Hendon, Christopher H.; Oms, Olivier; Gomez-Mingot, Maria; Fontecave, Marc; Mellot-Draznieks, Caroline; Dolbecq, Anne; Mialane, Pierre
Source:
Chemical communications 2019 v.55 no.29 pp. 4166-4169
ISSN:
1364-548X
Subject:
nickel,   etc   ; hydrogen production; irradiation; light; photocatalysis;     Show all 5 Subjects
Abstract:
... A unique polyoxometalate complex made up of a tetradecanuclear nickel bisphosphonate cluster capping a {SiW₉} unit has been characterized. This stable compound exhibits a high hydrogen evolution reaction photocatalytic activity under visible light irradiation via a reductive quenching mechanism. ...
DOI:
10.1039/c9cc01269a

14. Control of surface reactivity towards unsaturated CC bonds and H over Ni-based intermetallic compounds in semi-hydrogenation of acetylene

Author:
Song, Yuanjun; Laursen, Siris
Source:
Journal of catalysis 2019 v.372 pp. 151-162
ISSN:
0021-9517
Subject:
nickel,   etc   ; aromatic compounds; boron; ethylene; hydrogenation; stoichiometry;     Show all 6 Subjects
Abstract:
... Intermetallic compounds composed of transition metals and semimetals or post-transition metals have been shown to exhibit elevated selectivity in olefins and aromatics production and other reactions that require control of CC activation and functionalization. The vast number of element combinations available for intermetallic compound production necessitates down-selecting to isolate catalytically ...
DOI:
10.1016/j.jcat.2019.02.018

15. Nickel-cobalt selenide as high-performance and long-life electrode material for supercapacitor

Author:
Xie, Shengli; Gou, Jianxia; Liu, Bin; Liu, Chenguang
Source:
Journal of colloid and interface science 2019 v.540 pp. 306-314
ISSN:
0021-9797
Subject:
nickel,   etc   ; capacitance; cobalt; electrochemistry; electrodes; energy density;     Show all 6 Subjects
Abstract:
... In this work, a series of NixCo1−xSe2 selenides are prepared with x ranging from 0 to 1 and investigated as electrode materials for supercapacitor. The sample Ni0.6Co0.4Se2 shows 1580 and 1205 F g−1 at 1 and 20 A g−1, respectively. At 10 A g−1, 90% capacitance retention is sustained after 20,000 cycles. A Ni0.6Co0.4Se2-based asymmetric supercapacitor (ASC) is assembled and exhibits energy density ...
DOI:
10.1016/j.jcis.2019.01.030

16. Collapse of LiNi₁–ₓ–yCoₓMnyO₂ Lattice at Deep Charge Irrespective of Nickel Content in Lithium-Ion Batteries

Author:
Li, Wangda; Asl, Hooman Yaghoobnejad; Xie, Qiang; Manthiram, Arumugam
Source:
Journal of the American Chemical Society 2019 v.141 no.13 pp. 5097-5101
ISSN:
1520-5126
Subject:
nickel,   etc   ; anisotropy; cathodes; lithium batteries; shrinkage;     Show all 5 Subjects
Abstract:
... Volume variation and the associated mechanical fracture of electrode materials upon Li extraction/insertion are a main cause limiting lifetime performance of lithium-ion batteries. For LiNi₁–ₓ–yCoₓMnyO₂ (NCM) cathodes, abrupt anisotropic collapse of the layered lattice structure at deep charge is generally considered characteristic to high Ni content and can be effectively suppressed by elemental ...
DOI:
10.1021/jacs.8b13798

17. All-Inorganic Quantum-Dot Light-Emitting Diodes with Reduced Exciton Quenching by a MgO Decorated Inorganic Hole Transport Layer

Author:
Jiang, Yibin; Jiang, Le; Yan Yeung, Fion Sze; Xu, Ping; Chen, Shuming; Kwok, Hoi-Sing; Li, Guijun
Source:
ACS applied materials & interfaces 2019 v.11 no.12 pp. 11119-11124
ISSN:
1944-8252
Subject:
nickel oxide,   etc   ; light emitting diodes; magnesium oxide;     Show all 3 Subjects
Abstract:
... Here, wide-bandgap magnesium oxide (MgO) is employed as a decorator for the nickel oxide (NiOₓ) hole transport layer (HTL), by means of a bulk dopant as well as a surface modifier. QLEDs with Ni₀.₈₈Mg₀.₁₂Oₓ serving as the HTL achieve an ∼19.5% efficiency improvement compared to devices using pristine NiOₓ. Further inserting an ultrathin MgO layer between the Ni₀.₈₈Mg₀.₁₂Oₓ and QDs to separate the ...
DOI:
10.1021/acsami.9b01742

18. First-principles study of the effect of dopants (Pd, Ni) on the formation and desorption of T₂O from a Li₂TiO₃ (001) surface

Author:
Fang, Yiyu; Kong, Xianggang; Yu, You; Zhang, Xiaotong; Chen, Xiaojun; Gao, Tao; Xiao, Chengjian; Lu, Tiecheng
Source:
RSC advances 2019 v.9 no.15 pp. 8490-8497
ISSN:
2046-2069
Subject:
nickel,   etc   ; desorption; energy; palladium; tritiated water;     Show all 5 Subjects
Abstract:
... We investigated the effect of Pd and Ni dopants on the formation and desorption of tritiated water (T₂O) molecules from the Li₂TiO₃ (001) surface using first-principles calculations coupled with the climbing-image nudged elastic band method. We calculated the energy barriers for T₂O production and desorption on the pure Li₂TiO₃ surface to be 0.94 and 0.64 eV, respectively. The Pd and Ni dopants en ...
DOI:
10.1039/c9ra00830f

19. Critical roles of potassium in charge-carrier balance and diffusion induced defect passivation for efficient inverted perovskite solar cells

Author:
Yin, Xuewen; Han, Jianhua; Zhou, Yu; Gu, Youchen; Tai, Meiqian; Nan, Hui; Zhou, Yangying; Li, Jianbao; Lin, Hong
Source:
Journal of materials chemistry A 2019 v.7 no.10 pp. 5666-5676
ISSN:
2050-7496
Subject:
nickel oxide,   etc   ; fullerene; potassium; solar cells;     Show all 4 Subjects
Abstract:
... NiO is a well-known hole transporting material (HTM) for hysteresis-free inverted perovskite solar cells (PSCs) due to its wide optical bandgap resulting in low absorption losses, and its high conduction band edge resulting in an efficient electron blocking effect. Nevertheless, the photovoltaic performance of PSCs based on solution-processed NiO is still not pleasing owing to their relatively low ...
DOI:
10.1039/c8ta11782a

20. Liposome-Mediated in Situ Formation of AgI/Ag/BiOI Z-Scheme Heterojunction on Foamed Nickel Electrode: A Proof-of-Concept Study for Cathodic Liposomal Photoelectrochemical Bioanalysis

Author:
Yu, Si-Yuan; Mei, Li-Ping; Xu, Yi-Tong; Xue, Tie-Ying; Fan, Gao-Chao; Han, De-Man; Chen, Guangxu; Zhao, Wei-Wei
Source:
Analytical chemistry 2019 v.91 no.6 pp. 3800-3804
ISSN:
1520-6882
Subject:
nickel,   etc   ; bismuth; electrodes; iodides; ions; nanosilver; silver;     Show all 7 Subjects
Abstract:
... This work reports the liposome-mediated in situ formation of the AgI/Ag/BiOI Z-scheme heterojunction on foamed nickel electrode for signal-on cathodic photoelectrochemical (PEC) bioanalysis. Specifically, in a proof-of-concept study, Ag nanoparticle-encapsulated liposomes were initially confined via the sandwich immunobinding and then processed to release numerous Ag⁺ ions, which were then directe ...
DOI:
10.1021/acs.analchem.9b00352