Metabolic engineering of cyanobacteria for the production of hydrogen from water

2013 ◽  
Vol 41 (5) ◽  
pp. 1254-1259 ◽  
Author(s):  
Matthias Rögner
Keyword(s):  
Metabolic Engineering ◽  
Water Splitting ◽  
Living Cell ◽  
H2 Production ◽  
Synechocystis Pcc 6803 ◽  
Artificial System ◽  
Physiological Constraints ◽  
Production Of Hydrogen ◽  
Model Cell ◽  
Design Cell

Requirements concerning the construction of a minimal photosynthetic design cell with direct coupling of water-splitting photosynthesis and H2 production are discussed in the present paper. Starting from a cyanobacterial model cell, Synechocystis PCC 6803, potentials and possible limitations are outlined and realization strategies are presented. In extension, the limits of efficiency of all major biological components can be approached in a semi-artificial system consisting of two electrochemically coupled half-cells without the physiological constraints of a living cell.

CdS-Intercalated Nanocomposites for Hydrogen Production of Photocatalytic Water-Splitting

2011 ◽  
Vol 347-353 ◽  
pp. 52-55
Author(s):  
Yao Jun Zhang ◽  
Du Ping Chen ◽  
Li Cai Liu ◽  
Ya Chao Wang
Keyword(s):  
Water Splitting ◽  
Synergistic Effects ◽  
H2 Production ◽  
Layer Spacing ◽  
Photocatalytic Water Splitting ◽  
Quantum Size ◽  
Novel Approach ◽  
Photoelectric Performance ◽  
Production Of Hydrogen ◽  
Visible Spectra

A novel approach for synthesis of CdS-intercalated nanocomposites was investigated by thermal decomposition of cadmium thiourea complex embedded in the interlayer of montmorillonite. XRD results indicated that the incorporation of CdS into the interlayer of montmorillonite led to expansion of the layer spacing. The diffuse reflectance UV-visible spectra showed that the absorption edge of nanocomposites of CdS and montmorillonite was blue-shifted as compared with pure CdS due to quantum size effect. The photoelectric performance of nanocomposites was evaluated by photocatalytic water-splitting for production of hydrogen and the nanocomposites displayed much higher photocatalytic activities of H2 production than that of pure CdS owing to the synergistic effects between CdS and montmorillonite. A probable photocatalytic mechanism was proposed.

‘’Photo-electrochemical Water Splitting through Graphene-based ZnS Composites for H2 Production

2021 ◽  
pp. 115223
Author(s):  
Ahmed Hassan ◽  
Rabia Liaquat ◽  
Naseem Iqbal ◽  
Ghulam Ali ◽  
Xue Fan ◽  
...  
Keyword(s):  
Water Splitting ◽  
H2 Production ◽  
Electrochemical Water Splitting

scholarly journals Hydrogen production from water electrolysis: role of catalysts

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Shan Wang ◽  
Aolin Lu ◽  
Chuan-Jian Zhong
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Noble Metal ◽  
Active Sites ◽  
Current Knowledge ◽  
Low Cost ◽  
Critical Role ◽  
Water Electrolysis ◽  
Efficient Production ◽  
Production Of Hydrogen

AbstractAs a promising substitute for fossil fuels, hydrogen has emerged as a clean and renewable energy. A key challenge is the efficient production of hydrogen to meet the commercial-scale demand of hydrogen. Water splitting electrolysis is a promising pathway to achieve the efficient hydrogen production in terms of energy conversion and storage in which catalysis or electrocatalysis plays a critical role. The development of active, stable, and low-cost catalysts or electrocatalysts is an essential prerequisite for achieving the desired electrocatalytic hydrogen production from water splitting for practical use, which constitutes the central focus of this review. It will start with an introduction of the water splitting performance evaluation of various electrocatalysts in terms of activity, stability, and efficiency. This will be followed by outlining current knowledge on the two half-cell reactions, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), in terms of reaction mechanisms in alkaline and acidic media. Recent advances in the design and preparation of nanostructured noble-metal and non-noble metal-based electrocatalysts will be discussed. New strategies and insights in exploring the synergistic structure, morphology, composition, and active sites of the nanostructured electrocatalysts for increasing the electrocatalytic activity and stability in HER and OER will be highlighted. Finally, future challenges and perspectives in the design of active and robust electrocatalysts for HER and OER towards efficient production of hydrogen from water splitting electrolysis will also be outlined.

scholarly journals Optimizing accuracy and efficacy in data-driven materials discovery for the solar production of hydrogen

2021 ◽  
Author(s):  
Yihuang Xiong ◽  
Quinn Campbell ◽  
Julian Fanghanel ◽  
Cathy Badding ◽  
Huaiyu Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Fossil Fuel ◽  
Data Driven ◽  
Practical Relevance ◽  
Global Energy ◽  
Environmental Consequences ◽  
Energy Needs ◽  
Production Of Hydrogen ◽  
Water Photoelectrolysis ◽  
Hydrogen Fuels

The production of hydrogen fuels, via water splitting, is of practical relevance for meeting global energy needs and mitigating the environmental consequences of fossil-fuel-based transportation. Water photoelectrolysis has been proposed...

scholarly journals TiO2 Nanowires with Doped g-C3N4 Nanoparticles for Enhanced H2 Production and Photodegradation of Pollutants

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 254
Author(s):  
Liushan Jiang ◽  
Fanshan Zeng ◽  
Rong Zhong ◽  
Yu Xie ◽  
Jianli Wang ◽  
...  
Keyword(s):  
Environmental Governance ◽  
Fossil Fuels ◽  
H2 Production ◽  
Tio2 Nanowires ◽  
Photocatalytic Ability ◽  
Production Of Hydrogen ◽  
Growth Method ◽  
Renewable Hydrogen ◽  
Degradation Of Pollutants

With the rapid consumption of fossil fuels, along with the ever-increasing environmental pollution, it is becoming a top priority to explore efficient photocatalysts for the production of renewable hydrogen and degradation of pollutants. Here, we fabricated a composite of g-C3N4/TiO2 via an in situ growth method under the conditions of high-temperature calcination. In this method, TiO2 nanowires with a large specific surface area could provide enough space for loading more g-C3N4 nanoparticles to obtain C3N4/TiO2 composites. Of note, the g-C3N4/TiO2 composite could effectively photocatalyze both the degradation of several pollutants and production of hydrogen, both of which are essential for environmental governance. Combining multiple characterizations and experiments, we found that the heterojunction constructed by the TiO2 and g-C3N4 could increase the photocatalytic ability of materials by prompting the separation of photogenerated carriers. Furthermore, the photocatalytic mechanism of the g-C3N4/TiO2 composite was also clarified in detail.

Iron and Nitrogen Co-doped CoSe2 Nanosheet Arrays for Robust Electrocatalytic Water Oxidation

2021 ◽  
Author(s):  
Di Li ◽  
Yingying Xing ◽  
Changjian Zhou ◽  
Yikai Lu ◽  
Shengjie Xu ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Energy Barrier ◽  
Large Scale ◽  
Scale Production ◽  
Reaction Energy ◽  
Large Scale Production ◽  
Nanosheet Arrays ◽  
Production Of Hydrogen ◽  
Co Doped

The high reaction energy barrier of the oxygen evolution reaction (OER) extremely reduces the efficiency of water splitting, which is not conducive to large-scale production of hydrogen. Due to the...

Sulfide-oxidation-assisted electrochemical water splitting for H2 production on a bifunctional Cu2S/nickel foam catalyst

2021 ◽  
Author(s):  
Yuhou Pei ◽  
Jiong Cheng ◽  
Heng Zhong ◽  
Zhenfeng Pi ◽  
Zhao Yu ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Oxidation Reaction ◽  
Nickel Foam ◽  
Sulfide Oxidation ◽  
H2 Production ◽  
Electro Oxidation ◽  
Electrochemical Water Splitting

Replacing the sluggish oxygen evolution reaction (OER) by sulfide electro-oxidation reaction (SOR) could be a promising way to decrease the energy consumption for hydrogen evolution reaction (HER) and to treat...

scholarly journals Photodeposition of Ag Nanocrystals onto TiO2 Nanotube Platform for Enhanced Water Splitting and Hydrogen Gas Production

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Nur Aimi Jani ◽  
Choonyian Haw ◽  
Weesiong Chiu ◽  
Saadah Abdul Rahman ◽  
Poisim Khiew ◽  
...  
Keyword(s):  
Water Splitting ◽  
Gas Production ◽  
Hydrogen Gas ◽  
Current Work ◽  
Plasmonic Resonance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Production Of Hydrogen ◽  
Production Activity ◽  
Ag Ncs

Current work reports the study of Ag nanocrystals (NCs) decorated doubly anodized (DA) TiO2 nanotubes (NTs) thin film as an efficient photoelectrode material for water splitting and photocatalytic hydrogen gas production. DA process has been shown to be capable of producing less defective NTs and creating additional spacious gaps in between NT bundles to allow efficient and uniform integration of Ag NCs. By employing photoreduction method, Ag NCs can be deposited directly onto NTs, where the size and density of coverage can be maneuvered by merely varying the concentration of Ag precursors. Field emission scanning electron microscope (FESEM) images show that the Ag NCs with controllable size are homogeneously decorated onto the walls of NTs with random yet uniform distribution. X-ray diffraction (XRD) results confirm the formation of anatase TiO2 NTs and Ag NCs, which can be well indexed to standard patterns. The decoration of metallic Ag NCs onto the surface of NTs demonstrates a significant enhancement in the photoconversion efficiency as compared to that of pristine TiO2 NTs. Additionally, the as-prepared nanocomposite film also shows improved efficiency when used as a photocatalyst platform in the production of hydrogen gas. Such improvement in the performance of water splitting and photocatalytic hydrogen gas production activity can be credited to the surface plasmonic resonance of Ag NCs present on the surface of the NTs, which renders improved light absorption and better charge separation. The current work can serve as a model of study for designing more advanced nanoarchitecture photoelectrode for renewable energy application.

H2 production by the water splitting reaction using photocatalysts derived from calcined ZnAl LDH

Fuel ◽  
2019 ◽  
Vol 240 ◽  
pp. 262-269 ◽  
Author(s):  
M. Suárez-Quezada ◽  
G. Romero-Ortiz ◽  
J.E. Samaniego-Benítez ◽  
V. Suárez ◽  
A. Mantilla
Keyword(s):  
Water Splitting ◽  
H2 Production
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