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1. FeNi-LDH Intercalation for Suppressing the Self-Discharge of the VB₂–Air Battery

Author:
Wang, Fanqi; Wu, Meifen; Chowdari, Bobba V. R.; Wen, Zhaoyin
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8219-8224
ISSN:
1944-8252
Subject:
hydrogen bonding; hydrogen ions; hydrogen production,   etc   ; anodes; batteries; corrosion;     Show all 6 Subjects
Abstract:
... The VB₂–air battery is currently known for its highest theoretical specific capacity, up to 4060 mA h g–¹. This together with the excellent environmental compatibility and high security endues with promising application prospects for the battery. However, the self-discharge of the anode caused by hydrogen evolution corrosion results in a severe capacity loss during discharge. In this work, we stud ...
DOI:
10.1021/acsami.9b20119

2. Bioaugmentation enhances dark fermentative hydrogen production in cultures exposed to short-term temperature fluctuations

Author:
Okonkwo, Onyinye; Escudie, Renaud; Bernet, Nicolas; Mangayil, Rahul; Lakaniemi, Aino-Maija; Trably, Eric
Source:
Applied microbiology and biotechnology 2020 v.104 no.1 pp. 439-449
ISSN:
0175-7598
Subject:
hydrogen; hydrogen production,   etc   ; bioaugmentation; mixed culture; temperature;     Show all 5 Subjects
Abstract:
... Hydrogen-producing mixed cultures were subjected to a 48-h downward or upward temperature fluctuation from 55 to 35 or 75 °C. Hydrogen production was monitored during the fluctuations and for three consecutive batch cultivations at 55 °C to evaluate the impact of temperature fluctuations and bioaugmentation with synthetic mixed culture of known H₂ producers either during or after the fluctuation. ...
DOI:
10.1007/s00253-019-10203-8
PubMed:
31754763
PubMed Central:
PMC6942602

3. A 100 kW cavity-receiver reactor with an integrated two-step thermochemical cycle: Thermal performance under solar transients

Author:
Vidal, Alfonso; Gonzalez, Aurelio; Denk, Thorsten
Source:
Renewable energy 2020 v.153 pp. 270-279
ISSN:
0960-1481
Subject:
hydrogen; hydrogen production,   etc   ; carbon dioxide; ferrimagnetic materials; solar energy;     Show all 5 Subjects
Abstract:
... A future sustainable economy based on hydrogen will require large-scale hydrogen production processes in a CO₂ emission-free way. Within this context, solar-driven thermochemical water splitting cycles have been proposed as a promising alternative for hydrogen mass production with the use of concentrated solar energy as the principal source to provide the process heat.Numerous solar thermochemical ...
DOI:
10.1016/j.renene.2020.01.146

4. Electricity and hydrogen co-production via scramjet multi-expansion open cooling cycle coupled with a PEM electrolyzer

Author:
Seyedmatin, Pourya; Karimian, Saeed; Rostamzadeh, Hadi; Amidpour, Majid
Source:
Energy 2020 v.199 pp. 117364
ISSN:
0360-5442
Subject:
hydrogen; hydrogen production,   etc   ; electricity; exergy; fuels; heat; mass flow; turbines;     Show all 8 Subjects
Abstract:
... A scramjet multi-stage open cooling cycle for co-production of electricity and hydrogen is proposed here in which the fuel of the scramjet is used as coolant of the cooling cycle. Energy and exergy analysis of the devised system are conducted to evaluate the performance of the system and the effects of multi-expansion deliberation. In this integrated system, the waste heat of the scramjet cooling ...
DOI:
10.1016/j.energy.2020.117364

5. 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:
hydrogen; hydrogen production,   etc   ; adsorption; catalysts; catalytic activity; cathodes; molybdenum; platinum;     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

6. Covalent-organic framework based Z-scheme heterostructured noble-metal-free photocatalysts for visible-light-driven hydrogen evolution

Author:
Zhang, Yang-Peng; Tang, Hong-Liang; Dong, Hong; Gao, Meng-Yao; Li, Chang-Cheng; Sun, Xiao-Jun; Wei, Jin-Zhi; Qu, Yang; Li, Zhi-Jun; Zhang, Feng-Ming
Source:
Journal of materials chemistry A 2020 v.8 no.8 pp. 4334-4340
ISSN:
2050-7496
Subject:
hydrogen; hydrogen production,   etc   ; electrons; ferric oxide; light; photocatalysis; photocatalysts;     Show all 7 Subjects
Abstract:
... The construction of a Z-scheme heterostructured system is an effective way to improve the separation of photogenerated electrons–holes and the hydrogen evolution activity of photocatalysts. In this work, for the first time, we report a class of covalent-organic framework (COF) based Z-scheme heterostructured hybrids for efficient visible-light-driven photocatalytic hydrogen evolution. An excellent ...
DOI:
10.1039/c9ta12870k

7. Functional transformation of four-bladed rylene propellers utilizing non-metal and d⁸ metal core shifting strategy: significant impact on photovoltaic performance and electrocatalytic hydrogen evolution activity

Author:
Han, Jianhua; Shi, Wenwen; Wang, Xunchang; Cai, Jingwen; Hao, Xinyu; Shi, Jingying; Bao, Xichang; Yang, Renqiang
Source:
Journal of materials chemistry A 2020 v.8 no.7 pp. 3918-3932
ISSN:
2050-7496
Subject:
hydrogen; hydrogen production,   etc   ; catalysts; catalytic activity; electrochemistry; propellers;     Show all 6 Subjects
Abstract:
... Two kinds of four-bladed perylene diimide (PDI) propellers with d⁸ metal and non-metal cores are efficiently synthesized. The Ni-PDI, Pd-PDI, and Pt-PDI propellers, equipped with d⁸ metal cores, have two absorption bands at 350–650 nm and 780–1200 nm with deep LUMO levels of −4.40 eV to −4.51 eV. The TTF-PDI, QU-PDI, and PH-PDI propellers with non-metal cores have only one absorption band at 350–6 ...
DOI:
10.1039/d0ta00506a

8. Design and evaluation of a novel multigeneration system based on SOFC-GT for power, desalinated water and hydrogen supply

Author:
Chitgar, Nazanin; Moghimi, Mahdi
Source:
Energy 2020 pp. 117162
ISSN:
0360-5442
Subject:
hydrogen; hydrogen production,   etc   ; algorithms; desalination; electricity; exergy; freshwater; fuel cells;     Show all 8 Subjects
Abstract:
... A novel hybrid system is proposed based on solid oxide fuel cell - gas turbine (SOFC-GT) for simultaneous production of electricity, freshwater and hydrogen. Through a parametric study, the influences of major decision parameters on the performance of the system are studied. The energy, exergy and exergoeconomic investigations are conducted, and then, the system is optimized by using the genetic a ...
DOI:
10.1016/j.energy.2020.117162

9. Enhanced Conductivity and Thermochromic Luminescence in Hydrogen Bond-Stabilized Columnar Liquid Crystals

Author:
Mu, Bin; Zhao, Yu; Li, Xun; Quan, Xuhong; Tian, Wei
Source:
ACS applied materials & interfaces 2020 v.12 no.8 pp. 9637-9645
ISSN:
1944-8252
Subject:
hydrogen; hydrogen bonding,   etc   ; electrical conductivity; emissions; liquid crystals; luminescence; wavelengths;     Show all 7 Subjects
Abstract:
... Developing discotic columnar liquid crystals (LCs) with both high electrical conductivity and strong luminescence remains a challenge because the intracolumnar interdisc π–π stacking usually in ordered discotic columnar LCs is essential to generate charge transport pathways but normally detrimental to light emissions. We here present tricyanotristyrylbenzene-based quasi-discotic LCs upon bearing t ...
DOI:
10.1021/acsami.9b20769

10. Complementary Effect of Intra- and Intermolecular Hydrogen Bonds on Electron Transfer in β-Hydroxy-Anthraquinone Derivatives

Author:
Nakayama, Tatsushi; Okumura, Noriko; Uno, Bunji
Source:
TheJournal of physical chemistry 2020 v.124 no.5 pp. 848-860
ISSN:
1520-5207
Subject:
hydrogen; hydrogen bonding,   etc   ; acetonitrile; electrochemistry; electron transfer; moieties; oxygen; quinones;     Show all 8 Subjects
Abstract:
... We have carried out an electrochemical and theoretical study on the relationship between electron transfer (ET) and hydrogen bonding in 11 different 9,10-anthraquinone (AQ) derivatives, including β-hydroxy AQs and their methoxylated analogs, in the presence of hydrogen donors in acetonitrile (ACN). The complementary effects of the intra- and intermolecular hydrogen bonds (HBs) on ET were studied b ...
DOI:
10.1021/acs.jpcb.9b10733

11. Study of low-temperature ignition characteristics in a supersonic combustor

Author:
Li, Jianping; Li, Jindong; Wang, Kai; Jiao, Guiqian; Liao, Zilong
Source:
Energy 2020 v.195 pp. 117060
ISSN:
0360-5442
Subject:
hydrogen,   etc   ; burning; combustion; kerosene; temperature;     Show all 5 Subjects
Abstract:
... The Ignition combustion experiment in a supersonic combustor was carried out under the conditions with the incoming flow Ma = 2.0, the total temperature at 700 K and the total pressure at 520 KPa(corresponding to the flight Mach number at 3.5). Spray blocks without struts and with struts (with the blockage ratios as 20%, 10%, 7.3% and 5% respectively) were used in the supersonic combustor. The exp ...
DOI:
10.1016/j.energy.2020.117060

12. Exploring the role of halide mixing in lead-free BZA₂SnX₄ two dimensional hybrid perovskites

Author:
Pisanu, Ambra; Coduri, Mauro; Morana, Marta; Ciftci, Yasemin O.; Rizzo, Aurora; Listorti, Andrea; Gaboardi, Mattia; Bindi, Luca; Queloz, Valentine I. E.; Milanese, Chiara; Grancini, Giulia; Malavasi, Lorenzo
Source:
Journal of materials chemistry A 2020 v.8 no.4 pp. 1875-1886
ISSN:
2050-7496
Subject:
hydrogen bonding,   etc   ; cations; geometry; mixing;     Show all 4 Subjects
Abstract:
... The role of halide substitution in a lead-free 2D hybrid perovskite is investigated on the BZA₂SnX₄ (BZA = benzylammonium; X = Cl, Br and I) system, by reporting the synthesis and the structural analysis by means of single-crystal X-ray diffraction data of the two novel compositions BZA₂SnBr₄ and BZA₂SnCl₄. In addition, the mixed composition BZA₂Sn(BrₓI₁₋ₓ)₄ (0 ≤ x ≤ 1) has been prepared by mechan ...
DOI:
10.1039/c9ta11923j

13. Achieving an unprecedented hydrogen evolution rate by solvent-exfoliated CPP-based photocatalysts

Author:
Cheng, Jing-Zhao; Liu, Li-Lin; Liao, Guangfu; Shen, Zhao-Qi; Tan, Zhi-Rong; Xing, Yu-Qin; Li, Xiao-Xiao; Yang, Kai; Chen, Long; Liu, Shi-Yong
Source:
Journal of materials chemistry A 2020 v.8 no.12 pp. 5890-5899
ISSN:
2050-7496
Subject:
hydrogen; hydrogen bonding; hydrogen production,   etc   ; ascorbic acid; catering; dimethylformamide; irradiation; light; photocatalysis; photocatalysts; polymers; pyrrolidones; solvents; water solubility;     Show all 14 Subjects
Abstract:
... How to prompt higher photocatalytic hydrogen production (PHP) efficiency from water to achieve practical applications still remains a big challenge with conjugated porous polymers (CPP)-based photocatalysts. Herein, we developed a simple and efficient cosolvent-assisted strategy to significantly improve the photocatalytic efficiency of CPP-based photocatalysts by introducing water-soluble aprotic ...
DOI:
10.1039/c9ta13514f

14. Water collection from air by ionic liquids for efficient visible-light-driven hydrogen evolution by metal-free conjugated polymer photocatalysts

Author:
Chen, Yu; Gao, Xiang; Liu, Xinwei; Ji, Guipeng; Fu, Li; Yang, Yingze; Yu, Qiqi; Zhang, Wenjing; Xue, Xiaomeng
Source:
Renewable energy 2020 v.147 pp. 594-601
ISSN:
0960-1481
Subject:
hydrogen; hydrogen fuels; hydrogen production,   etc   ; air; groundwater; ionic liquids; irradiation; light; photocatalysis; photocatalysts; polymers; renewable energy sources;     Show all 12 Subjects
Abstract:
... The scarcity of Groundwater on Earth increases the necessity to make full use of the ubiquitous atmospheric water (H2O). Photocatalytic conversion of the H2O from the air to hydrogen (H2) under visible-light irradiation by metal-free conjugated polymer photocatalysts (CMPs) would be an interesting and challenging route for fully utilizing H2O resources and converting to sustainable and green energ ...
DOI:
10.1016/j.renene.2019.09.029

15. Pyrenediones as versatile photocatalysts for oxygenation reactions with in situ generation of hydrogen peroxide under visible light

Author:
Zhang, Yuannian; Yang, Xin; Tang, Haidi; Liang, Dong; Wu, Jie; Huang, Dejian
Source:
Green chemistry 2020 v.22 no.1 pp. 22-27
ISSN:
1463-9270
Subject:
hydrogen; hydrogen peroxide; hydrogen production,   etc   ; alkenes; epoxidation reactions; green chemistry; hydroxylation; irradiation; light; oxidants; oxidation; oxygen; photocatalysts; solvents; sulfides;     Show all 15 Subjects
Abstract:
... Pyrenediones (PYDs) are efficient photocatalysts for three oxygenation reactions: epoxidation of electron deficient olefins, oxidative hydroxylation of organoborons, and oxidation of sulfides via in situ generation of H₂O₂ under visible light irradiation, using oxygen as a terminal oxidant and IPA as a solvent and a hydrogen donor. ...
DOI:
10.1039/c9gc03152a

16. Photolysis dynamics of m- and o-fluorophenol: Substitution effects on tunneling mechanism

Author:
Deng, Xulan; Tang, Ying; Song, Xinli; Liu, Kai; Gu, Zhenfei; Zhang, Bing
Source:
Chemosphere 2020 v.253 pp. 126747
ISSN:
0045-6535
Subject:
hydrogen bonding,   etc   ; image analysis; kinetic energy; photolysis;     Show all 4 Subjects
Abstract:
... The photolysis dynamics of m-fluorophenol (m-FPhOH) and o-fluorophenol (o-FPhOH) have been investigated with time-resolved velocity map imaging (TR-VMI) and time-resolved ion-yield (TR-IY) techniques. Following excitation to the origin of S₁ (ππ∗) state of m- and o-FPhOH, H atoms elimination mediated by tunneling through the potential barrier under the S₁ (ππ∗)/S₂ (πσ∗) conical intersection (CI) h ...
DOI:
10.1016/j.chemosphere.2020.126747

17. Removal of contaminants of emerging concern by continuous flow solar photo-Fenton process at neutral pH in open reactors

Author:
Arzate, S.; Campos-Mañas, M.C.; Miralles-Cuevas, S.; Agüera, A.; García Sánchez, J.L.; Sánchez Pérez, J.A.
Source:
Journal of environmental management 2020 v.261 pp. 110265
ISSN:
0301-4797
Subject:
hydrogen peroxide,   etc   ; effluents; iron; pH; wastewater treatment;     Show all 5 Subjects
Abstract:
... For the first time, the operational feasibility of the solar photo-Fenton process at neutral pH in continuous flow has been tested for three consecutive days. The aim of the treatment was to remove of contaminants of emerging concern (CECs) from wastewater treatment plant secondary effluents. To this end, a 5 cm-deep raceway pond reactor was run in continuous flow mode and the degradation of the C ...
DOI:
10.1016/j.jenvman.2020.110265

18. Hydrogen sorption capacity of crystal lattice defects and low Miller index surfaces of copper

Author:
Lousada, Cláudio M.; Korzhavyi, Pavel A.
Source:
Journal of materials science 2020 v.55 no.15 pp. 6623-6636
ISSN:
0022-2461
Subject:
hydrogen,   etc   ; chemical bonding; copper; physicochemical properties; sorption;     Show all 5 Subjects
Abstract:
... The effect of hydrogen on the physical–chemical properties of copper is directly dependent on the types of chemical bonding between H and lattice defects in Cu. In this work, we performed a systematic study of the bonding of H-atoms with crystal lattice defects of copper. This included three types of symmetric tilt grain boundaries (GBs), Σ3, Σ5 and Σ11, and the low Miller index surfaces, (111), ( ...
DOI:
10.1007/s10853-020-04459-z

19. Mn0.3Cd0.7S nanorods modified with NiS clusters as photocatalysts for the H2 evolution reaction

Author:
Han, Yanling; Zhang, Qian; Liang, Zhibin; Geng, Jianming; Dong, Xinfa
Source:
Journal of materials science 2020 v.55 no.13 pp. 5390-5401
ISSN:
0022-2461
Subject:
hydrogen production,   etc   ; nanorods; photocatalysis; photocatalysts; symbiosis; synthesis;     Show all 6 Subjects
Abstract:
... The intimate contact of co-catalyst and host photocatalyst benefits the separation and transfer of carriers in time, hindering the recombination of e⁻ and h⁺ during the photocatalytic process. Herein, a facile one-pot solvothermal methodology was applied to fabricate NiS clusters-modified Mn₀.₃Cd₀.₇S p–n heterojunction photocatalyst. Compared with NiS@Mn₀.₃Cd₀.₇S synthesized by the two-step approa ...
DOI:
10.1007/s10853-020-04405-z

20. Synthesis of isolated carbon nanowalls via high-voltage nanosecond pulses in conjunction with CH4/H2 plasma enhanced chemical vapor deposition

Author:
Ichikawa, Tomonori; Shimizu, Naohiro; Ishikawa, Kenji; Hiramatsu, Mineo; Hori, Masaru
Source:
Carbon 2020 v.161 pp. 403-412
ISSN:
0008-6223
Subject:
hydrogen,   etc   ; adsorption; energy; graphene; methane; vapors;     Show all 6 Subjects
Abstract:
... Carbon nanowalls (CNWs) are vertically standing, interconnecting flake- or wall-like collections of graphene sheets. In the present work, this material was synthesized by applying precisely controlled high-voltage nanosecond pulses to a substrate using an inductor energy storage circuit in a radical-injection plasma-enhanced chemical vapor deposition system, employing a CH₄/H₂ plasma. The resultin ...
DOI:
10.1016/j.carbon.2020.01.064