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1. Importance of Vacancies and Doping in the Hole-Transporting Nickel Oxide Interface with Halide Perovskites

Author:
Traore, Boubacar; Pedesseau, Laurent; Blancon, Jean-Christophe; Tretiak, Sergei; Mohite, Aditya D.; Even, Jacky; Katan, Claudine; Kepenekian, Mikaël
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 6633-6640
ISSN:
1944-8252
Subject:
nickel; nickel oxide,   etc   ; electric potential difference; electronic equipment; films (materials);     Show all 5 Subjects
Abstract:
... Nickel oxide (NiO) is a commonly used contact material for a variety of thin-film optoelectronic technologies based on organic or hybrid materials. In such setups, interfaces play a crucial role as they can reduce, if not kill, the device performances by bringing additional traps or energy barriers, hindering the extraction of charge carriers from the active layer. Here, we computationally examine ...
DOI:
10.1021/acsami.9b19457

2. Tunable Magnetoelastic Effects in Voltage-Controlled Exchange-Coupled Composite Multiferroic Microstructures

Author:
Xiao, Z.; Lo Conte, R.; Goiriena-Goikoetxea, M.; Chopdekar, R. V.; Lambert, C.-H. A.; Li, X.; N’Diaye, A. T.; Shafer, P.; Tiwari, S.; Barra, A.; Chavez, A.; Mohanchandra, K. P.; Carman, G. P.; Wang, K. L.; Salahuddin, S.; Arenholz, E.; Bokor, J.; Candler, R. N.
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 6752-6760
ISSN:
1944-8252
Subject:
nickel,   etc   ; computer hardware; magnetism; microstructure;     Show all 4 Subjects
Abstract:
... The magnetoelectric properties of exchange-coupled Ni/CoFeB-based composite multiferroic microstructures are investigated. The strength and sign of the magnetoelastic effect are found to be strongly correlated with the ratio between the thicknesses of two magnetostrictive materials. In cases where the thickness ratio deviates significantly from one, the magnetoelastic behavior of the multiferroic ...
DOI:
10.1021/acsami.9b20876

3. Electroreductive 4-Pyridylation of Electron-deficient Alkenes with Assistance of Ni(acac)₂

Author:
Zhang, Sheng; Li, Lijun; Li, Xinru; Zhang, Junqi; Xu, Kun; Li, Guigen; Findlater, Michael
Source:
Organic letters 2020 v.22 no.9 pp. 3570-3575
ISSN:
1523-7052
Subject:
nickel,   etc   ; alkenes; chemical reactions; chemical structure; voltammetry;     Show all 5 Subjects
Abstract:
... An electroreductive 4-pyridylation of activated alkenes was developed in an undivided cell with the assistance of Ni(acac)₂ (acac = acetylacetone). This novel protocol is compatible with a broad range of electron-poor alkenes, which are commonly regarded as challenging substrates in the previous conventional approaches. Moreover, a series of cyclic voltammetric experiments were conducted to reveal ...
DOI:
10.1021/acs.orglett.0c01014

4. A Simple Dual-Ion Doping Method for Stabilizing Li-Rich Materials and Suppressing Voltage Decay

Author:
Yu, Yang; Yang, Zhe; Zhong, Jianjian; Liu, Yanying; Li, Jianling; Wang, Xindong; Kang, Feiyu
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 13996-14004
ISSN:
1944-8252
Subject:
nickel,   etc   ; electrochemistry; lithium; oxygen; sulfates; synergism;     Show all 6 Subjects
Abstract:
... A gentle method is used to treat the precursor to induce the doping of SO₄²– and Ni²⁺. The doped SO₄²– induces the formation of oxygen vacancies and defects, which are beneficial for inhibition of the loss of O²–, stabilization of the structure, and amelioration of voltage decay, and the doped Ni²⁺ increases the degree of lithium nickel mixing and significantly increases the midvoltage. After modi ...
DOI:
10.1021/acsami.0c00944

5. Vibronic Fingerprints of the Nickel Oxidation States in Surface-Supported Porphyrin Arrays

Author:
Stredansky, M.; Moro, S.; Corva, M.; Jugovac, M.; Zamborlini, G.; Feyer, V.; Schneider, C. M.; Cojocariu, I.; Sturmeit, H. M.; Cinchetti, M.; Verdini, A.; Cossaro, A.; Floreano, L.; Vesselli, E.
Source:
Journal of physical chemistry 2020 v.124 no.11 pp. 6297-6303
ISSN:
1932-7455
Subject:
nickel,   etc   ; copper; methanogens; oxidation; oxidoreductases; porphyrins; solvents;     Show all 7 Subjects
Abstract:
... The 2D self-assembly of Ni-containing tetrapyrroles on Cu(100) allows control of the Ni atom oxidation state, yielding inactive Ni(II) or active Ni(I) upon modification of the molecule–substrate interaction, resembling the behavior of the biochemical counterpart. Ni(I) is indeed the active site of methanogenic bacteria in the tetrahydrocorphin of the F₄₃₀ coenzyme of methyl-coenzyme reductase. Tun ...
DOI:
10.1021/acs.jpcc.0c01387

6. Bright Blue Light Emission of Ni²⁺ Ion-Doped CsPbClₓBr₃–ₓ Perovskite Quantum Dots Enabling Efficient Light-Emitting Devices

Author:
Pan, Gencai; Bai, Xue; Xu, Wen; Chen, Xu; Zhai, Yue; Zhu, Jinyang; Shao, He; Ding, Nan; Xu, Lin; Dong, Biao; Mao, Yanli; Song, Hongwei
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 14195-14202
ISSN:
1944-8252
Subject:
nickel,   etc   ; blue light; quantum dots; television;     Show all 4 Subjects
Abstract:
... In recent years, significant advances have been achieved in the red and green perovskite quantum dot (PQD)-based light-emitting diodes (LEDs). However, the performances of the blue perovskite LEDs are still seriously lagging behind that of the green and red counterparts. Herein, we successfully developed Ni²⁺ ion-doped CsPbClₓBr₃–ₓ PQDs through the room-temperature supersaturated recrystallization ...
DOI:
10.1021/acsami.0c01074

7. Single-crystal investigation of the compound SmNi₅.₂Mn₆.₈

Author:
Belan, Bohdana; Kowalska, Dorota; Manyako, Mykola; Dzevenko, Mariya; Kalychak, Yaroslav
Source:
Zeitschrift für Naturforschung 2020 v.75 no.3 pp. 303-307
ISSN:
1865-7117
Subject:
nickel,   etc   ; X-ray diffraction; crystal structure; manganese;     Show all 4 Subjects
Abstract:
... The intermetallic compound SmNi₅.₂Mn₆.₈ was synthesized by arc-melting and its crystal structure has been determined using single-crystal X-ray diffraction data. The compound adopts the tetragonal structure type ThMn₁₂: space group I4/mmm, Pearson code tI26, Z = 2; a = 8.6528(3), c = 4.8635(3) Å; R1 = 0.0175, wR2 = 0.0372, 171 F² values, 17 refined variables. The two crystallographic positions 8f ...
DOI:
10.1515/znb-2019-0181

8. Synthesis of Tertiary Benzylic Nitriles via Nickel-Catalyzed Markovnikov Hydrocyanation of α-Substituted Styrenes

Author:
Xing, Yidan; Yu, Rongrong; Fang, Xianjie
Source:
Organic letters 2020 v.22 no.3 pp. 1008-1012
ISSN:
1523-7052
Subject:
nickel,   etc   ; catalytic activity; chemical reactions; moieties; nitriles;     Show all 5 Subjects
Abstract:
... The Markovnikov hydrocyanation of α-substituted styrenes enables the synthesis of tertiary benzylic nitriles under nickel catalysis. The Lewis-acid-free transformation features an unprecedented functional groups tolerance, including the −OH and −NH₂ groups. A broad range of tertiary benzylic nitriles were obtained in good to excellent yields. In addition, an asymmetric version of this reaction was ...
DOI:
10.1021/acs.orglett.9b04554

9. Filter paper templated one-dimensional NiO/NiCo2O4 microrod with wideband electromagnetic wave absorption capacity

Author:
Qin, Ming; Liang, Hongsheng; Zhao, Xiaoru; Wu, Hongjing
Source:
Journal of colloid and interface science 2020 v.566 pp. 347-356
ISSN:
0021-9797
Subject:
nickel; nickel oxide,   etc   ; absorption; acetates; adsorption; cellulosic fibers; chemical reactions; cobalt; electromagnetic radiation; salts; temperature;     Show all 11 Subjects
Abstract:
... Filter paper, as a widely used and low-cost lab consumable, can serve as template for the synthesis of one-dimensional (1D) materials since it is composed of 1D cellulosic fiber. In this work, 1D NiO/NiCo₂O₄ composite was simply fabricated by adsorption of Ni and Co acetate on the filter paper and subsequent calcination process. The precursors were obtained without further treatment to filter pape ...
DOI:
10.1016/j.jcis.2020.01.114

10. Effect of Selenium Content on Nickel Sulfoselenide-Derived Nickel (Oxy)hydroxide Electrocatalysts for Water Oxidation

Author:
Wygant, Bryan R.; Poterek, Anna H.; Burrow, James N.; Mullins, C. Buddie
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 20366-20375
ISSN:
1944-8252
Subject:
nickel; nickel oxide,   etc   ; catalysts; chemical analysis; electrochemistry; oxidation; selenium; sulfides; transmission electron microscopy;     Show all 9 Subjects
Abstract:
... An efficient and inexpensive electrocatalyst for the oxygen evolution reaction (OER) must be found in order to improve the viability of hydrogen fuel production via water electrolysis. Recent work has indicated that nickel chalcogenide materials show promise as electrocatalysts for this reaction and that their performance can be further enhanced with the generation of ternary, bimetallic chalcogen ...
DOI:
10.1021/acsami.0c00425

11. W doping dominated NiO/NiS2 interfaced nanosheets for highly efficient overall water splitting

Author:
Wang, Haohan; Liu, Tao; Bao, Kai; Cao, Jian; Feng, Jicai; Qi, Junlei
Source:
Journal of colloid and interface science 2020 v.562 pp. 363-369
ISSN:
0021-9797
Subject:
nickel; nickel oxide,   etc   ; annealing; carbon; catalysts; catalytic activity; electric potential difference; electrochemistry; electrodes; nanosheets; sulfides;     Show all 11 Subjects
Abstract:
... Constructing high-efficiency electrocatalysts is vital towards electrocatalytic water splitting, but it remains a challenge. Although Ni-based materials have drawn extensive attention as highly active catalysts, the relatively limited electroactive sites in Ni-based catalysts still remains a great issue. In order to further boost the electrocatalytic performances, heteroatom doping and interface e ...
DOI:
10.1016/j.jcis.2019.12.044

12. Role of nickel dopant on gas response and selectivity of electrospun indium oxide nanotubes

Author:
Bai, Jinglong; Wang, Qiao; Wang, Yanrong; Cheng, Xu; Yang, Zhenyu; Gu, Xiuyun; Huang, Baoyu; Sun, Gengzhi; Zhang, Zhenxing; Pan, Xiaojun; Zhou, Jin Yuan; Xie, Erqing
Source:
Journal of colloid and interface science 2020 v.560 pp. 447-457
ISSN:
0021-9797
Subject:
nickel; nickel oxide,   etc   ; adsorption; catalytic activity; ethanol; indium; ions; nanotubes; vapors;     Show all 9 Subjects
Abstract:
... It has been demonstrated that the incorporation of Ni into metal oxide-based gas sensors often enhances the sensing performance by increasing the catalytic and heterojunction effects. However, it remains unclear how these two effects work either individually or synergistically in gas sensing. Herein, a series of Ni-doped In₂O₃ nanotubes (NIO NTs) with different doping concentrations were synthesiz ...
DOI:
10.1016/j.jcis.2019.10.090

13. Changes in Ni-NiO equilibrium due to LaFeO3 and the effect on dry reforming of CH4

Author:
Mao, Xinyu; Foucher, Alexandre C.; Stach, Eric A.; Gorte, Raymond J.
Source:
Journal of catalysis 2020 v.381 pp. 561-569
ISSN:
0021-9517
Subject:
nickel; nickel oxide,   etc   ; X-ray diffraction; catalysts; methane; oxidation; transmission electron microscopy;     Show all 7 Subjects
Abstract:
... The interactions between Ni and LaFeO₃ were studied on catalysts prepared by Atomic Layer Deposition (ALD) of 0.5-nm films of LaFeO₃ on MgAl₂O₄. Scanning Transmission Electron Microscopy showed that the films covered the support uniformly, even after 5 redox cycles at 1073 K, and X-Ray Diffraction showed that the films had the perovskite structure. Equilibrium between Ni and NiO was studied using ...
DOI:
10.1016/j.jcat.2019.11.040

14. Comparing corrosion behavior of Ni and Ni-Mo electroplated coatings in chloride mediums

Author:
Mosayebi, Sepehr; Rezaei, Milad; Mahidashti, Zeynab
Source:
Colloids and surfaces 2020 v.594 pp. 124654
ISSN:
0927-7757
Subject:
nickel,   etc   ; coatings; corrosion; dielectric spectroscopy; hydrochloric acid; molybdenum; sodium chloride;     Show all 7 Subjects
Abstract:
... The aim of this study was to evaluate the effect of Mo content in Ni-Mo electroplated coatings on the structure and corrosion behavior of the obtained coatings in chloride mediums. Microscopic investigations showed that the synthesized coatings had a cauliflower-like appearance and amorphous structure. For comparing the corrosion behavior of the coatings, polarization and electrochemical impedance ...
DOI:
10.1016/j.colsurfa.2020.124654

15. Evaluation of thermal conductivity of deionized water containing SDS-coated NiO nanoparticles under the influences ofconstant and alternative varied magnetic fields

Author:
Chen, Zhixiong; Liu, Pengpeng; Zare, Ali; Karimipour, Arash; Abdollahi, Ali; Tlili, Iskander
Source:
Powder technology 2020 v.367 pp. 143-156
ISSN:
0032-5910
Subject:
nickel oxide,   etc   ; magnetic fields; nanofluids; nanoparticles; temperature; thermal conductivity;     Show all 6 Subjects
Abstract:
... The impacts of SDS-coated NiO nanoparticles, temperature and nanoparticles concentration were investigated on thermal conductivity of nanofluid under permanent and alternative magnetic fields. Three different temperatures of 40, 60 and 80 °C and nanoparticles concentrations in the range of 0.01 to 1%were chosen. The results showed that thermal conductivity of nanofluid varied with increasing nanof ...
DOI:
10.1016/j.powtec.2020.03.044

16. Effects of some heavy metals on thiol compounds in Synechocystis sp. isolates

Author:
Yılmaz, E. Ş.; Öztürk, Ş.; Aslım, B.
Source:
International journal of environmental science and technology 2020 v.17 no.5 pp. 3013-3022
ISSN:
1735-1472
Subject:
nickel,   etc   ; Synechocystis; chromium; heavy metals; lead; metal tolerance; thiols; toxicity;     Show all 8 Subjects
Abstract:
... The study aims to investigate the role of protein-bound, nonprotein and total thiols in metal resistance of Synechocystis isolates exposed to Ni(II), Cr(IV) and Pb(II). Synechocystis sp. BASO403 and BASO404 were investigated with regard to their exposure to 15 ppm Ni(II), 5 ppm Cr(VI) and 100 ppm Pb(II) for metal toxicity and thiol production. Each isolate was effected by metals when compared with ...
DOI:
10.1007/s13762-020-02709-w

17. Multilayering process of electrodeposited nanocrystalline iron–nickel alloys for further strengthening

Author:
Zhang, Shuzhe; Kobayashi, Shigeaki
Source:
Journal of materials science 2020 v.55 no.13 pp. 5627-5638
ISSN:
0022-2461
Subject:
nickel,   etc   ; alloys; chlorides; electrolytes; electroplating; iron; nanocrystals; tensile strength;     Show all 8 Subjects
Abstract:
... Effect of multilayering on the tensile property in nanocrystalline (nc) iron–nickel (Fe–Ni) alloys was studied to obtain a clue to further strengthening of nc materials. Multilayering electrodeposition process of nc Fe–Ni alloys with different Ni contents was investigated using an electrolyte which mainly composed of nickel sulfamate and iron chloride. The Ni content in the obtained nc Fe–Ni alloy ...
DOI:
10.1007/s10853-020-04378-z

18. Zr segregation in Ni–Zr alloy: implication on deformation mechanism during shear loading and bending creep

Author:
Pal, Snehanshu; Vijay Reddy, K.; Spearot, Douglas E.
Source:
Journal of materials science 2020 v.55 no.14 pp. 6172-6186
ISSN:
0022-2461
Subject:
nickel,   etc   ; alloys; deformation; molecular dynamics; nanocrystals; shear strength; zirconium;     Show all 7 Subjects
Abstract:
... Grain boundary (GB) migration and grain growth in nanocrystalline metals are major obstructions to exploit these materials to their fullest potential, thus limiting their utility as advanced structural materials. Here, we investigate the effect of Zr segregation to a Ni GB on migration and subsequent strengthening during shear deformation and high-temperature bending creep. Specifically, using mol ...
DOI:
10.1007/s10853-020-04411-1

19. Electret behavior of unpoled carbon fiber with and without nickel coating

Author:
Xi, Xiang; Chung, D.D.L.
Source:
Carbon 2020 v.159 pp. 122-132
ISSN:
0008-6223
Subject:
nickel,   etc   ; capacitance; carbon fibers; coatings; electric field; enzymes; models;     Show all 7 Subjects
Abstract:
... Unpoled continuous polyacrylonitrile-based carbon fiber is an electret, as tested along the fiber direction of a 12,000-fiber tow. The open-circuit DC electric field before (E₁) and after (E₂) polarity reversal are opposite in sign, with │E₂│ slightly less than E₁, which is contributed by voltmeter-current-induced polarization. Both E₁ and │E₂│increase linearly with inter-electrode distance l, wit ...
DOI:
10.1016/j.carbon.2019.12.033

20. Evolution of Ni/Li antisites under the phase transition of a layered LiNi₁/₃Co₁/₃Mn₁/₃O₂ cathode

Author:
Gao, Ang; Sun, Yang; Zhang, Qinghua; Zheng, Jieyun; Lu, Xia
Source:
Journal of materials chemistry A 2020 v.8 no.13 pp. 6337-6348
ISSN:
2050-7496
Subject:
nickel,   etc   ; cathodes; cations; electrochemistry; lithium; lithium batteries; phase transition;     Show all 7 Subjects
Abstract:
... At present, the expectation for batteries with an enhanced performance has accelerated the development of high-performance cathodes, among which the layered cathodes have drawn significant attention and probably hold the key to unlocking the capacity limitations of Li-ion batteries (LIBs). However, the capacity advantages of layered cathodes, especially in the high voltage delithiation region, can ...
DOI:
10.1039/d0ta01642j