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1. Relationship between liquid depth and the acoustic generation of hydrogen: design aspect for large cavitational reactors with special focus on the role of the wave attenuation

Author:
Kerabchi, Nassim; Merouani, Slimane; Hamdaoui, Oualid
Source:
International journal of green energy 2019 v.16 no.6 pp. 423-434
ISSN:
1543-5083
Subject:
hydrogen; hydrogen production,   etc   ; acoustics; liquids; temperature;     Show all 5 Subjects
Abstract:
... Understanding the effect of the liquid depth (z) on the acoustic generation of hydrogen is highly required for designing large-scale sonoreactors for hydrogen production because acoustic cavitation is the central event that initiates sonochemical reactions. In this paper, we present a computational analysis of the liquid-depth effect on the generation of H₂ from a reactive acoustic bubble trapped ...
DOI:
10.1080/15435075.2019.1577741

2. Tough and stretchable inorganic/organic double network ion gel containing gemini-type ionic liquid as a multiple hydrogen bond cross-linker

Author:
Yasui, Tomoki; Kamio, Eiji; Matsuyama, Hideto
Source:
RSC advances 2019 v.9 no.21 pp. 11870-11876
ISSN:
2046-2069
Subject:
hydrogen; hydrogen bonding,   etc   ; gels; ionic liquids;     Show all 4 Subjects
Abstract:
... Tough and stretchable inorganic/organic double network ion gels containing gemini-type ionic liquids with two OH groups in the di-cation, which can work as multiple hydrogen bond-based weak cross-linkers of the gel networks, are developed. ...
DOI:
10.1039/c9ra01790a

3. Unravelling the key role of surface features behind facet-dependent photocatalysis of anatase TiO₂

Author:
Peng, Yung-Kang; Keeling, Benedict; Li, Yiyang; Zheng, Jianwei; Chen, Tianyi; Chou, Hung-Lung; Puchtler, Tim J.; Taylor, Robert A.; Tsang, Shik Chi Edman
Source:
Chemical communications 2019 v.55 no.30 pp. 4415-4418
ISSN:
1364-548X
Subject:
hydrogen; hydrogen production,   etc   ; nanocrystallites; photocatalysis; titanium dioxide;     Show all 5 Subjects
Abstract:
... The high activity of nanocrystallites is commonly attributed to the terminal high-energy facets. However, we demonstrate that the high activity of the anatase TiO₂(001) facet in photocatalytic H₂ evolution is not due to its high intrinsic surface energy, but local electronic effects created by surface features on the facet. ...
DOI:
10.1039/c9cc01561b

4. Boosting Visible-Light Photocatalytic Hydrogen Evolution with an Efficient CuInS₂/ZnIn₂S₄ 2D/2D Heterojunction

Author:
Guan, Zhongjie; Pan, Jingwen; Li, Qiuye; Li, Guoqiang; Yang, Jianjun
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.8 pp. 7736-7742
ISSN:
2168-0485
Subject:
hydrogen; hydrogen production,   etc   ; nanosheets; photocatalysis; photocatalysts;     Show all 5 Subjects
Abstract:
... Developing photocatalysts with a high-efficiency charge separation remains a challenge in the solar hydrogen production. Herein, we devised and prepared a unique 2D/2D heterojunction of CuInS₂/ZnIn₂S₄ nanosheets for solar hydrogen evolution. Structural characterizations reveal that the CuInS₂/ZnIn₂S₄ 2D/2D heterojunction with lattice match consists of the thin thickness of nanosheets and has a lar ...
DOI:
10.1021/acssuschemeng.8b06587

5. Experimental Evidence for pKₐ-Driven Asynchronicity in C–H Activation by a Terminal Co(III)–Oxo Complex

Author:
Goetz, McKenna K.; Anderson, John S.
Source:
Journal of the American Chemical Society 2019 v.141 no.9 pp. 4051-4062
ISSN:
1520-5126
Subject:
carbon-hydrogen bond activation; hydrogen,   etc   ; cobalt;     Show all 3 Subject
Abstract:
... C–H activation by transition metal oxo complexes is a fundamental reaction in oxidative chemistry carried out by both biological and synthetic systems. This centrality has motivated efforts to understand the patterns and mechanisms of such reactivity. We have therefore thoroughly examined the C–H activation reactivity of the recently synthesized and characterized late transition metal oxo complex ...
DOI:
10.1021/jacs.8b13490

6. Construction of a dual-channel mode for wide spectrum-driven photocatalytic H₂ production

Author:
Zhang, Lulu; Zhang, Hongwen; Wang, Bo; Huang, Xueyan; Gao, Fan; Zhao, Yan; Weng, Sunxian; Liu, Ping
Source:
Journal of materials chemistry A 2019 v.7 no.3 pp. 1076-1082
ISSN:
2050-7496
Subject:
hydrogen; hydrogen production,   etc   ; photocatalysis; surface plasmon resonance;     Show all 4 Subjects
Abstract:
... The composite with heavily incorporated HₓWO₃ (H₀.₅₃WO₃/CdS) was successfully synthesized by a facile method of photo-assisted in situ reduction and applied in photocatalytic water splitting into H₂. Its photocatalytic activity is about 70 times greater than that of pure CdS. Such a heterostructure shows wide spectral response in the UV-vis-NIR range, which is attributed to the LSPR of H₀.₅₃WO₃. I ...
DOI:
10.1039/c8ta08914k

7. Efficient and controllable growth of vertically oriented graphene nanosheets by mesoplasma chemical vapor deposition

Author:
Zhang, Huan; Wu, Sudong; Lu, Ziyu; Chen, Xinchun; Chen, Qixian; Gao, Pingqi; Yu, Tianbao; Peng, Zhijian; Ye, Jichun
Source:
Carbon 2019 v.147 pp. 341-347
ISSN:
0008-6223
Subject:
hydrogen,   etc   ; graphene; nanosheets; vapors;     Show all 4 Subjects
Abstract:
... Owing to the unique nanoarchitecture and graphene in nature, the vertically oriented graphene nanosheets (VGN) possesses many promising properties and holds great potential for various applications. Although the plasma-enhanced chemical vapor deposition (PECVD) techniques have been the effective and widely used approaches, they remain the challenge for the controllable and efficient growth of VGN ...
DOI:
10.1016/j.carbon.2019.01.042

8. Supercooling Behavior and Dipole-Glass-like Relaxation in a Three-Dimensional Water Framework

Author:
Huang, Rui-Kang; Wang, Sha-Sha; Liu, De-Xuan; Li, Xin; Song, Jian-Ming; Xia, Yuan-Hua; Zhou, Dong-Dong; Huang, Jin; Zhang, Wei-Xiong; Chen, Xiao-Ming
Source:
Journal of the American Chemical Society 2019 v.141 no.14 pp. 5645-5649
ISSN:
1520-5126
Subject:
hydrogen,   etc   ; models; supercooling;     Show all 3 Subjects
Abstract:
... The dynamic behaviors of a new type of three-dimensional (3D) water framework symbiotic with 1D stacking organic guests, including an order–disorder transition of hydrogen atoms, a supercooling phenomenon during phase transition, and a dipole-glass-like relaxation behavior due to locally trapped water molecules, are presented. This extremely scarce 3D water framework, together with the rich dynami ...
DOI:
10.1021/jacs.9b01866

9. Transition from Linear to Circular Motion in Active Spherical-Cap Colloids

Author:
Shelke, Yogesh; Srinivasan, N. R.; Thampi, Sumesh P.; Mani, Ethayaraja
Source:
Langmuir 2019 v.35 no.13 pp. 4718-4725
ISSN:
1520-5827
Subject:
hydrogen peroxide,   etc   ; colloids; fuels;     Show all 3 Subjects
Abstract:
... Nonspherical self-propelling colloidal particles offer many possibilities for creating a variety of active motions. In this work, we report on the transition from linear to circular motion of active spherical-cap particles near a substrate. Self-propulsion is induced by self-diffusiophoresis by catalytic decomposition of hydrogen peroxide (H₂O₂) on one side of the particle. Asymmetric distribution ...
DOI:
10.1021/acs.langmuir.9b00081

10. Graphene oxide membranes with narrow inter-sheet galleries for enhanced hydrogen separation

Author:
Ibrahim, Amr F. M.; Banihashemi, Fateme; Lin, Y. S.
Source:
Chemical communications 2019 v.55 no.21 pp. 3077-3080
ISSN:
1364-548X
Subject:
hydrogen,   etc   ; graphene oxide; polyesters;     Show all 3 Subjects
Abstract:
... This paper reports synthesis of graphene oxide (GO) membranes with narrow interlayer free spacing on scalable polyester substrates using GO sheets prepared by Brodie's method. The GO membranes show interlayer free spacing of ∼3.2 Å with significantly improved hydrogen perm-selectivity than the GO membranes with the large inter-sheet spacing reported in literature. ...
DOI:
10.1039/c8cc10283j

11. Computational Analysis of Linker Defective Metal–Organic Frameworks for Membrane Separation Applications

Author:
Kim, Hoeyeon; Lee, Sangwon; Kim, Jihan
Source:
Langmuir 2019 v.35 no.11 pp. 3917-3924
ISSN:
1520-5827
Subject:
hydrogen,   etc   ; coordination polymers; methane;     Show all 3 Subjects
Abstract:
... Intracrystalline defects in metal–organic frameworks (MOFs) are known to have crucial roles in dictating their material properties. In this work, computational simulations were used to induce linker vacancy defects in MOF membranes and to investigate their influence on H₂/CH₄ separation. Linker defective structures were created for the 228 candidate MOFs, and their separation performances were com ...
DOI:
10.1021/acs.langmuir.8b04175

12. Hydrodeoxygenation of crude bio-oil in situ in the bio-oil aqueous phase with addition of zero-valent aluminum

Author:
Yang, Tianhua; Shi, Linping; Li, Rundong; Li, Bingshuo; Kai, Xingping
Source:
Fuel processing technology 2019 v.184 pp. 65-72
ISSN:
0378-3820
Subject:
hydrogen,   etc   ; aluminum; biofuels;     Show all 3 Subjects
Abstract:
... This study investigated the influence of the ratios of zero-valent aluminum (ZV-Al) to bio-oil aqueous phase (1/25, 1.5/25, and 2/25 g/mL) on hydrodeoxygenation (HDO) of crude bio-oil (CBO) with in situ hydrogen generated via the reaction of ZV-Al and the aqueous phase. The reaction of ZV-Al and the aqueous phase produced more hydrogen than the reaction of ZV-Al and water due to the aqueous phase ...
DOI:
10.1016/j.fuproc.2018.10.025

13. Electronic and Nuclear Contributions to Vibrational Stark Shifts of Hydroxyl Stretching Frequencies of Water Clusters C

Author:
Lim, Jong Hyeon; Cho, Daeheum; Kang, Heon; Lee, Jin Yong
Source:
Journal of physical chemistry 2018 v.122 no.24 pp. 12970-12974
ISSN:
1932-7455
Subject:
hydrogen; hydrogen bonding,   etc   ; vibration;     Show all 3 Subject
Abstract:
... In spite of the importance of vibrational Stark effect (VSE) and many attempts, origin of VSE is still unclear in molecular level. Here, we studied on origin of VSE of hydroxyl stretching vibration in small water clusters (monomer, dimer, and tetramer) assuming that VSE can be separated by nuclear and electronic contribution. We calculated total Stark tuning rate (Δμₜₒₜ) and its nuclear contributi ...
DOI:
10.1021/acs.jpcc.8b03936

14. Improvement of continuous hydrogen production using individual and binary enzymatic hydrolysates of agave bagasse in suspended-culture and biofilm reactors

Author:
Montoya-Rosales, José de Jesús; Olmos-Hernández, Diana Karime; Palomo-Briones, Rodolfo; Montiel-Corona, Virginia; Mari, Angelo Gabriel; Razo-Flores, Elías
Source:
Bioresource technology 2019 v.283 pp. 251-260
ISSN:
0960-8524
Subject:
hydrogen; hydrogen production,   etc   ; bagasse; biofilm; biofuels; energy; hydrolysates; hydrolysis;     Show all 8 Subjects
Abstract:
... Continuous hydrogen (H2) production from individual (Stonezyme, IH) and binary (Celluclast-Viscozyme, BH) enzymatic hydrolysates of agave bagasse was evaluated in continuous stirred-tank reactors (CSTR) and trickling bed reactors (TBR). The volumetric H2 production rates (VHPR) in CSTR were 13 and 2.25 L H2/L-d with BH and IH, respectively. Meanwhile, VHPR of 5.76 and 2.0 L H2/L-d were obtained in ...
DOI:
10.1016/j.biortech.2019.03.072

15. Cobalt-catalyzed synthesis of N-containing heterocycles via cyclization of ortho-substituted anilines with CO₂/H₂

Author:
Ke, Zhengang; Yu, Bo; Wang, Huan; Xiang, Junfeng; Han, Juanjuan; Wu, Yunyan; Liu, Zhenghui; Yang, Peng; Liu, Zhimin
Source:
Green chemistry 2019 v.21 no.7 pp. 1695-1701
ISSN:
1463-9270
Subject:
hydrogen; hydrogen bonding,   etc   ; carbon dioxide; cobalt; green chemistry; moieties;     Show all 6 Subjects
Abstract:
... The CO₂-involved synthesis of chemicals is of great significance from the green and sustainable chemistry viewpoint. Herein, we report a non-noble metal catalytic system composed of CoF₂, CsF and P(CH₂CH₂PPh₂)₃ (denoted as PP₃) for the synthesis of N-containing heterocycles from ortho-substituted anilines and CO₂/H₂. Mechanism investigation indicates that [Co(PP₃)H(CO₂)]⁺ is a catalytically active ...
DOI:
10.1039/c9gc00095j

16. Energy and exergy analyses of an integrated system using waste material gasification for hydrogen production and liquefaction

Author:
Yuksel, Yunus Emre; Ozturk, Murat; Dincer, Ibrahim
Source:
Energy conversion and management 2019 v.185 pp. 718-729
ISSN:
0196-8904
Subject:
hydrogen; hydrogen production,   etc   ; absorption; energy efficiency; exergy; gasification; liquefaction; wastes;     Show all 8 Subjects
Abstract:
... In this study, a new combined gasification process using various waste materials for multigenerational operation, containing the hydrogen, power, heating-cooling and hot water generation. In the present multigenerational plant, a waste material gasifier component is combined with the Brayton cycle, Stirling engine cycle, single effect absorption cooling cycle and proton exchange membrane electroly ...
DOI:
10.1016/j.enconman.2019.02.033

17. More efficiently enhancing photocatalytic activity by embedding Pt within anatase–rutile TiO2 heterophase junction than exposing Pt on the outside surface

Author:
Lin, Jinjin; Sun, Tao; Li, Minbo; Yang, Jinxiang; Shen, Jinni; Zhang, Zizhong; Wang, Ying; Zhang, Xiaoyan; Wang, Xuxu
Source:
Journal of catalysis 2019 v.372 pp. 8-18
ISSN:
0021-9517
Subject:
hydrogen; hydrogen production,   etc   ; electrons; photocatalysis; photocatalysts; semiconductors; titanium dioxide;     Show all 7 Subjects
Abstract:
... Loading noble metal on the surface has been widely used to improve photocatalytic activity of semiconductor photocatalyst. Here, Pt-embedded anatase (A)-rutile (R) TiO2 junction photocatalyst (A/Pt/R) was found to show much more efficient photocatalytic H2 evolution activity than the other TiO2 photocatalysts loading Pt on the outside surface (such as Pt/A/R, Pt/A, Pt/R and Pt/P25), although the a ...
DOI:
10.1016/j.jcat.2019.02.019

18. Dimensionality Control of Self-Assembled Azobenzene Derivatives on a Gold Surface

Author:
Kim, Hyo Won; Jung, Jaehoon; Han, Mina; Ku, JiYeon; Kuk, Young; Kim, Yousoo
Source:
Journal of physical chemistry 2019 v.123 no.14 pp. 8859-8864
ISSN:
1932-7455
Subject:
hydrogen; hydrogen bonding,   etc   ; engineering; gold; nanomaterials; van der Waals forces;     Show all 6 Subjects
Abstract:
... Well-defined nanostructures constructed with functional molecules provide a feasible route to realize molecular nanotechnology. Synthesis of selectively interacting molecules is essential to develop nanostructures with desired functionalities and dimensions. Substantial efforts have been devoted to achieve finely controlled supramolecular structures on surfaces using various interactions such as v ...
DOI:
10.1021/acs.jpcc.8b11744

19. A flexible CdS nanorods-carbon nanotubes/stainless steel mesh photoanode for boosted photoelectrocatalytic hydrogen evolution

Author:
Li, Han; Xiao, Shuning; Zhou, Jiachen; Zhao, Jingjing; Liu, Fanfan; Li, Guisheng; Zhang, Dieqing
Source:
Chemical communications 2019 v.55 no.19 pp. 2741-2744
ISSN:
1364-548X
Subject:
hydrogen; hydrogen production,   etc   ; electrons; iron; irradiation; nanotubes; photocatalysis; stainless steel;     Show all 8 Subjects
Abstract:
... An innovative flexible reticular photoanode (CdS-nanorods/CNTs coated on stainless iron mesh) was designed for efficiently driving photoelectrocatalytic (PEC) hydrogen (H₂) evolution under visible-light irradiation. Such CdS-NRs/CNTs-based flexible photoanodes exhibited a record-breaking H₂ evolution rate (728 mmol h⁻¹ g⁻¹) among the reported CdS-based photoanodes under visible-light irradiation o ...
DOI:
10.1039/c9cc00050j

20. Room temperature synthesis of CdS/SrTiO3 nanodots-on-nanocubes for efficient photocatalytic H2 evolution from water

Author:
Yin, Xing-Liang; Li, Lei-Lei; Li, Da-Cheng; Wei, Deng-Hu; Hu, Cheng-Chao; Dou, Jian-Min
Source:
Journal of colloid and interface science 2019 v.536 pp. 694-700
ISSN:
0021-9797
Subject:
hydrogen; hydrogen production,   etc   ; absorption; ambient temperature; nanohybrids; photocatalysis; photocatalysts; pollution;     Show all 8 Subjects
Abstract:
... Spontaneous solar-driven water splitting to generate H2 with no pollution discharge is an ideal H2 generation approach. However, its efficiency remains far from real application owing to the poor light-harvesting and ultrafast charge recombination of photocatalysts. To address these issues, herein, we employed a novel but simple chemical bath deposition (CBD) method to construct CdS/SrTiO3 nanodot ...
DOI:
10.1016/j.jcis.2018.10.097