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1. Determination of Platinum Group Elements in Geological Samples by Inductively Coupled Plasma Mass Spectrometry: Possibilities and Limitations

Author:
Grebneva-Balyuk, O. N.; Kubrakova, I. V.
Source:
Journal of analytical chemistry 2020 v.75 no.3 pp. 275-285
ISSN:
1061-9348
Subject:
platinum,   etc   ; atomic absorption spectrometry; gold;     Show all 3 Subjects
Abstract:
... Published data on approaches used to suppress/eliminate interferences of various origins in determining platinum group elements and gold in geological samples by inductively coupled plasma mass spectrometry are generalized and analyzed. ...
DOI:
10.1134/S1061934820030065

2. One-pot synthesis of 1,3-butanediol by 1,4-anhydroerythritol hydrogenolysis over a tungsten-modified platinum on silica catalyst

Author:
Liu, Lujie; Asano, Takehiro; Nakagawa, Yoshinao; Tamura, Masazumi; Tomishige, Keiichi
Source:
Green chemistry 2020 v.22 no.8 pp. 2375-2380
ISSN:
1463-9270
Subject:
platinum,   etc   ; catalysts; glycerol; green chemistry; silica; synthesis;     Show all 6 Subjects
Abstract:
... Chemical production of 1,3-butanediol from biomass-derived compounds was first reported by 1,4-anhydroerythritol hydrogenolysis over a Pt–WOₓ/SiO₂ catalyst. The reaction proceeded by ring opening hydrogenolysis of 1,4-anhydroerythritol followed by selective removal of secondary OH groups in 1,2,3-butanetriol, and an overall 1,3-butanediol yield up to 54% was then obtained. The performance of the P ...
DOI:
10.1039/d0gc00244e

3. Unravelling the selective growth mechanism of AlOₓ with dimethylaluminum isopropoxide as a precursor in atomic layer deposition: a combined theoretical and experimental study

Author:
Yang, Jiaqiang; Cao, Kun; Hu, Quan; Wen, Yanwei; Liu, Xiao; Chen, Rong; Shan, Bin
Source:
Journal of materials chemistry A 2020 v.8 no.8 pp. 4308-4317
ISSN:
2050-7496
Subject:
platinum,   etc   ; catalysts; durability; encapsulation; isopropyl alcohol; nanoparticles;     Show all 6 Subjects
Abstract:
... The selective encapsulation of noble metal catalysts is a newly developed method to maintain their durability and reactivity. In our work, we have found that AlOₓ can preferentially encapsulate Pt nanoparticle facets with dimethylaluminum isopropoxide (DMAI) as an ALD precursor. The selectivity originates from the preferential DMAI decomposition mechanism on double hydroxyl sites of the Pt (111) f ...
DOI:
10.1039/c9ta11575g

4. Rational Design of Axially Chiral Platinabinaphthalenes with Aggregation-Induced Emission for Red Circularly Polarized Phosphorescent Organic Light-Emitting Diodes

Author:
Jiang, Zhiyong; Wang, Jun; Gao, Tingting; Ma, Jianping; Liu, Zhipeng; Chen, Runfeng
Source:
ACS applied materials & interfaces 2020 v.12 no.8 pp. 9520-9527
ISSN:
1944-8252
Subject:
platinum,   etc   ; enantiomers; light emitting diodes; phosphorescence;     Show all 4 Subjects
Abstract:
... Circularly polarized luminescent (CPL) materials have received a lot of interest due to their potential applications in next-generation displays. However, the development of easily accessible red circularly polarized phosphorescent emitters for practical organic light-emitting diodes fabrication remains a grand challenge. In this paper, we report a new family of CPL-active platinum complexes based ...
DOI:
10.1021/acsami.9b20568

5. Spontaneous Supramolecular Polymerization Driven by Discrete Platinum Metallacycle-Based Host–Guest Complexation

Author:
Shi, Bingbing; Zhou, Zhixuan; Vanderlinden, Ryan T.; Tang, Jian-Hong; Yu, Guocan; Acharyya, Koushik; Sepehrpour, Hajar; Stang, Peter J.
Source:
Journal of the American Chemical Society 2019 v.141 no.30 pp. 11837-11841
ISSN:
1520-5126
Subject:
platinum,   etc   ; polymerization; polymers;     Show all 3 Subjects
Abstract:
... Considerable progress in platinum metallacycle-based supramolecular polymerization has promoted the fabrication and application of supramolecular materials. However, despite recent advances, supramolecular polymers constructed through platinum metallacycle-based host–guest complexation remain rare because of the dynamics of platinum metallacycles. Here, we achieve linear supramolecular polymerizat ...
DOI:
10.1021/jacs.9b06181
PubMed:
31303001
PubMed Central:
PMC6693626

6. Spontaneous Formation of a Cross-Linked Supramolecular Polymer Both in the Solid State and in Solution, Driven by Platinum(II) Metallacycle-Based Host–Guest Interactions

Author:
Shi, Bingbing; Liu, Yuezhou; Zhu, Huangtianzhi; Vanderlinden, Ryan T.; Shangguan, Liqing; Ni, Ruidong; Acharyya, Koushik; Tang, Jian-Hong; Zhou, Zhixuan; Li, Xiaopeng; Huang, Feihe; Stang, Peter J.
Source:
Journal of the American Chemical Society 2019 v.141 no.16 pp. 6494-6498
ISSN:
1520-5126
Subject:
platinum,   etc   ; crosslinking; polymerization; polymers;     Show all 4 Subjects
Abstract:
... The recent progress in platinum(II) coordination-driven supramolecular polymers has had a substantial effect on the design of functional soft materials. However, the prospect of realizing polymerization induced by platinum(II) metallacycle-based host–guest interactions has received little attention until recently. Here we report the realization of supramolecular polymerization driven by platinum(I ...
DOI:
10.1021/jacs.9b02281
PubMed:
30966741
PubMed Central:
PMC6690365

7. Designed Conformation and Fluorescence Properties of Self-Assembled Phenazine-Cored Platinum(II) Metallacycles

Author:
Zhou, Zhixuan; Chen, Deng-Gao; Saha, Manik Lal; Wang, Heng; Li, Xiaopeng; Chou, Pi-Tai; Stang, Peter J.
Source:
Journal of the American Chemical Society 2019 v.141 no.13 pp. 5535-5543
ISSN:
1520-5126
Subject:
platinum,   etc   ; absorption; fluorescence; spectroscopy;     Show all 4 Subjects
Abstract:
... A series of platinum(II) metallacycles were prepared via the coordination-driven self-assembly of a phenazine-cored dipyridyl donor with a 90° Pt(II) acceptor and various dicarboxylate donors in a 1:1:2 ratio. While the metallacycles display similar absorption profiles, they exhibit a trend of blue-shifted fluorescence emission with the decrease in the bite angles between the carboxylate building ...
DOI:
10.1021/jacs.9b01368
PubMed:
30835458
PubMed Central:
PMC6701631

8. Controllable growth of palladium on gold multipod nanoparticles and their enhanced electrochemical oxygen reduction reaction performances

Author:
Duy Mai, Hien; Kim, Suncheol; Yoo, Hyojong
Source:
Journal of catalysis 2020 v.388 pp. 20-29
ISSN:
0021-9517
Subject:
platinum,   etc   ; durability; electrochemistry; gold; nanogold; nanoparticles; palladium; stabilizers; topology;     Show all 9 Subjects
Abstract:
... Integration of two metal constituents into core–shell structures is an efficient strategy to prepare advanced materials for a variety of applications. The controllable synthesis of targeted bimetallic core–shell nanostructures is an important yet challenging task. Herein, bimetallic nanoparticles comprising a gold multipod nanoparticle (GMN) core and distinctive Pd shell (GMN@Pd NPs) are successfu ...
DOI:
10.1016/j.jcat.2020.04.024

9. Probing the Local Bonding at the Pt/γ-Al₂O₃ Interface

Author:
Ayoola, Henry O.; Bonifacio, Cecile S.; Zhu, Qing; Li, Cheng-Han; House, Stephen D.; Kas, Joshua J.; Jinschek, Joerg; Rehr, John J.; Saidi, Wissam A.; Yang, Judith C.
Source:
Journal of physical chemistry 2020 v.124 no.18 pp. 9876-9885
ISSN:
1932-7455
Subject:
platinum,   etc   ; aluminum; aluminum oxide; catalysts; models; oxygen; physical chemistry; spectroscopy;     Show all 8 Subjects
Abstract:
... Metal–support interactions significantly affect the performance of heterogeneous catalysts, of which Pt supported on γ-Al₂O₃ is one of the most widely used. Characterizing the bonding of Pt on the γ-Al₂O₃ surface is key to fully understanding the catalyst–support interaction. Herein aberration-corrected and monochromated scanning transmission electron microscopy-based electron energy-loss spectros ...
DOI:
10.1021/acs.jpcc.9b12029

10. Revealing the oxygen reduction reaction activity origin of single atoms supported on g-C₃N₄ monolayers: a first-principles study

Author:
Niu, Huan; Wang, Xiting; Shao, Chen; Liu, Yuanshuang; Zhang, Zhaofu; Guo, Yuzheng
Source:
Journal of materials chemistry A 2020 v.8 no.14 pp. 6555-6563
ISSN:
2050-7496
Subject:
platinum,   etc   ; adsorption; carbon nitride; catalysts; electrochemistry; electrons; energy; gold; palladium;     Show all 9 Subjects
Abstract:
... Herein, the potential of single transition metal atoms (TM, from Ti to Au) supported on g-C₃N₄ (TM/g-C₃N₄) for the oxygen reduction reaction (ORR) was investigated by first-principles calculations. It was demonstrated that the TM atoms can remain stable in the cavity of g-C₃N₄ and interact with the substrate via charge transfer from the TM atoms to g-C₃N₄. Among all the TM/g-C₃N₄ samples, Pd/g-C₃N ...
DOI:
10.1039/d0ta00794c

11. Insight into the electrochemical-cycling activation of Pt/molybdenum carbide toward synergistic hydrogen evolution catalysis

Author:
He, Jianan; Cui, Zhenduo; Zhu, Shengli; Li, Zhaoyang; Wu, Shuilin; Zheng, Lirong; Gao, Zhonghui; Liang, Yanqin
Source:
Journal of catalysis 2020 v.384 pp. 169-176
ISSN:
0021-9517
Subject:
platinum,   etc   ; adsorption; catalysts; catalytic activity; cathodes; hydrogen; hydrogen production; molybdenum;     Show all 8 Subjects
Abstract:
... Dispersing catalytically active metals as single atoms on supports offer an efficient pathway to minimize amount of precious metals. Although platinum (Pt) is highly active for HER, it is highly desirable to find ways to improve the HER performance and also keeping them stable during catalytic reactions while minimizing the Pt loading. Herein, we report a cathode polarization technique to disperse ...
DOI:
10.1016/j.jcat.2020.02.020

12. Fast Polymerization of Polydopamine Based on Titanium Dioxide for High-Performance Flexible Electrodes

Author:
Huang, Zhaoling; Zeng, Qi; Hui, Yun; Alahi, Md. Eshrat E.; Qin, Shuijie; Wu, Tianzhun
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 14495-14506
ISSN:
1944-8252
Subject:
platinum,   etc   ; dopamine; electric current; electrodes; nanowires; photooxidation; polymerization; titanium dioxide;     Show all 8 Subjects
Abstract:
... Dopamine (DA) and its derivatives are promising for the fabrication of functional films and devices with excellent conductivity and long-term stability; nevertheless its polymerization process is typically prolonged. We have proposed the accelerated deposition process using ultraviolet (UV) irradiation with the existence of nanotitanium dioxide (nano-TiO₂) in order to realize the rapid and stable ...
DOI:
10.1021/acsami.9b19875

13. Rich Coverage-Dependent Carbon Phases Induced by Submonolayer Surface Segregation on Pt(111) at 78 K

Author:
Li, X. X.; Li, Q. L.; Miao, B. F.; Sun, L.; Ding, H. F.
Source:
Journal of physical chemistry 2020 v.124 no.12 pp. 6716-6724
ISSN:
1932-7455
Subject:
platinum,   etc   ; carbon; energy; phase transition; scanning tunneling microscopy;     Show all 5 Subjects
Abstract:
... We report on the systematical investigation of coverage-dependent carbon phases on Pt(111) at the submonolayer (ML) regime, utilizing low energy electron diffraction and scanning tunneling microscopy. At a coverage of ∼0.25 ML, carbon forms three domains with a relative rotation of 120° and each domain consists of rectangular structures, c(4 × 2)-2C. When the coverage reaches ∼0.3 ML, multicluster ...
DOI:
10.1021/acs.jpcc.0c00160

14. Palladium as a Superior Cocatalyst to Platinum for Hydrogen Evolution Using Covalent Triazine Frameworks as a Support

Author:
Liu, Manying; Wang, Xueqing; Liu, Jing; Wang, Kewei; Jin, Shangbin; Tan, Bien
Source:
ACS applied materials & interfaces 2020 v.12 no.11 pp. 12774-12782
ISSN:
1944-8252
Subject:
platinum,   etc   ; catalytic activity; hydrogen production; nanocatalysts; nitrogen; palladium; triazines;     Show all 7 Subjects
Abstract:
... Abundant pyridinic nitrogen in the triazine units of covalent triazine frameworks (CTFs) is very useful in various heterogeneous catalysis reactions. Herein, a tunable CTF platform with the same porous structure was designed and synthesized to study the interaction between palladium/platinum (Pd/Pt) and pyridinic nitrogen of CTFs. The smaller Pd nanoparticles were formed because of the stronger in ...
DOI:
10.1021/acsami.9b21903

15. Detecting inherited and novel structural variants in low-coverage parent-child sequencing data

Author:
Spence, Melissa; Banuelos, Mario; Marcia, Roummel F.; Sindi, Suzanne
Source:
Methods 2020 v.173 pp. 61-68
ISSN:
1046-2023
Subject:
platinum,   etc   ; children; genetic variation; genome; haploidy; neoplasms; parents; prediction;     Show all 8 Subjects
Abstract:
... Structural variants (SVs) are a class of genomic variation shared by members of the same species. Though relatively rare, they represent an increasingly important class of variation, as SVs have been associated with diseases and susceptibility to some types of cancer. Common approaches to SV detection require the sequencing and mapping of fragments from a test genome to a high-quality reference ge ...
DOI:
10.1016/j.ymeth.2019.06.025

16. Bimetallic PdZn nanoparticles for oxygen reduction reaction in alkaline medium: The effects of surface structure

Author:
Yang, Hongyu; Wang, Kai; Tang, Zhenghua; Liu, Zhen; Chen, Shaowei
Source:
Journal of catalysis 2020 v.382 pp. 181-191
ISSN:
0021-9517
Subject:
platinum,   etc   ; catalysts; catalytic activity; electrochemistry; fuel cells; nanoparticles; palladium; zinc;     Show all 8 Subjects
Abstract:
... Despite the recent advances in preparing high-efficiency and durable electrocatalysts for oxygen reduction reaction (ORR) toward fuel cell applications, there is still lacking of the understanding regarding the relationship between the electrocatalytic performance and the surface structure of the catalyst at atomic level. Herein, three PdZn bimetallic composites named as PdZn_Disordered, PdZn_Orde ...
DOI:
10.1016/j.jcat.2019.12.018

17. Efficient liquid-phase hydrogenation of cinnamaldehyde to cinnamyl alcohol with a robust PtFe/HPZSM-5 catalyst

Author:
Wang, Guimei; Xin, Huiyue; Wang, Qixiang; Wu, Peng; Li, Xiaohong
Source:
Journal of catalysis 2020 v.382 pp. 1-12
ISSN:
0021-9517
Subject:
platinum,   etc   ; alcohols; catalysts; catalytic activity; hydrogenation; iron; nanoparticles;     Show all 7 Subjects
Abstract:
... HPZSM-5 with hierarchical porous structure obtained via partial desilication of commercial ZSM-5 was proved to be a suitable support for Pt nanoparticles towards the liquid-phase selective hydrogenation of cinnamaldehyde (CAL) to yield cinnamyl alcohol (COL). Compared with Pt/ZSM-5, Pt/HPZSM-5 showed improved catalytic performance although the improvement seems to be very limited. After doping Fe ...
DOI:
10.1016/j.jcat.2019.12.004

18. Platinum Nanoparticle-Deposited Ti₃C₂Tₓ MXene for Hydrogen Evolution Reaction

Author:
Zhang, Xiaobao; Shao, Baiyi; Sun, Zemin; Gao, Zhe; Qin, Yong; Zhang, Ce; Cui, Fangming; Yang, Xiaojing
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.5 pp. 1822-1828
ISSN:
1520-5045
Subject:
platinum,   etc   ; catalysts; catalytic activity; electrochemistry; hydrogen production; nanoparticles;     Show all 6 Subjects
Abstract:
... Nobel metal Pt composites show high catalytic activity for hydrogen evolution reaction (HER) but limited in application by high Pt contents and therefore the cost. Herein, a series of Pt nanoparticle (NP)-deposited 2D Ti₃C₂Tₓ MXenes were prepared by an atomic layer deposition (ALD) method with relatively low Pt contents (0.98–3.10 wt %) and showed excellent HER catalytic activity and stability. Th ...
DOI:
10.1021/acs.iecr.9b05046

19. Facet effect of Pt nanocrystals on catalytical properties toward glycerol oxidation reaction

Author:
Zhou, Jian; Hu, Junhui; Zhang, Xueqiong; Li, Jiefei; Jiang, Kunhong; Liu, Yajun; Zhao, Guohui; Wang, Xiaojing; Chu, Haibin
Source:
Journal of catalysis 2020 v.381 pp. 434-442
ISSN:
0021-9517
Subject:
platinum,   etc   ; adsorption; catalysts; catalytic activity; glycerol; nanocrystals; oxidation; oxygen; surfactants;     Show all 9 Subjects
Abstract:
... Using nanocrystals with specific crystal facets is an effective way to enhance activity and selectivity for numerous catalytic reactions. However, the intrinsic facet effect is not fully understood. Herein, using Pt catalyzed glycerol oxidation reaction as the model system, the intrinsic facet effect on catalytic property is evaluated by three kinds of Pt nanocrystal catalysts with cubic, spherica ...
DOI:
10.1016/j.jcat.2019.11.019

20. Large improvement of CNT yarn electrical conductivity by varying chemical doping and annealing treatment

Author:
Dini, Yoann; Rouchon, Denis; Faure-Vincent, Jérôme; Dijon, Jean
Source:
Carbon 2020 v.156 pp. 38-48
ISSN:
0008-6223
Subject:
platinum,   etc   ; annealing; carbon nanotubes; chlorides; electrical conductivity; electrical resistance;     Show all 6 Subjects
Abstract:
... High conductive carbon nanotube (CNT) yarns are a near challenge to be an alternative to metal in electrical wiring. In this work, we largely improve carbon nanotube yarn electrical conductivity by chemical doping, annealing treatments (above 2000 °C) and combination of both. We present a new efficient CNT p-type dopant based on platinum chloride IV. It decreases the resistivity by a factor of 3 a ...
DOI:
10.1016/j.carbon.2019.09.022