scholarly journals Correction: In situ electrochemical H2 production for efficient and stable power-to-gas electromethanogenesis

2021 ◽  
Author(s):  
Frauke Kracke ◽  
Jörg S. Deutzmann ◽  
Wenyu Gu ◽  
Alfred M. Spormann
Keyword(s):  
H2 Production ◽  
Power To Gas

Correction for ‘In situ electrochemical H2 production for efficient and stable power-to-gas electromethanogenesis’ by Frauke Kracke et al., Green Chem., 2020, 22, 6194–6203, DOI: 10.1039/D0GC01894E.

In situ electrochemical H2 production for efficient and stable power-to-gas electromethanogenesis

2020 ◽  
Vol 22 (18) ◽  
pp. 6194-6203 ◽  
Author(s):  
Frauke Kracke ◽  
Jörg S. Deutzmann ◽  
Wenyu Gu ◽  
Alfred M. Spormann
Keyword(s):  
H2 Production ◽  
Integrated System ◽  
High Rate ◽  
Microbial Adaptation ◽  
Power To Gas

Directly integrated system demonstrating robust microbial electromethanogenesis at high rate and efficiency without requiring microbial adaptation to electrochemical conditions.

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.

An efficient ZnS-UV photocatalysts generated in situ from ZnS(en)0.5 hybrid during the H2 production in methanol–water solution

2012 ◽  
Vol 37 (22) ◽  
pp. 17002-17008 ◽  
Author(s):  
Agileo Hernández-Gordillo ◽  
Francisco Tzompantzi ◽  
Ricardo Gómez
Keyword(s):  
Water Solution ◽  
H2 Production

scholarly journals How [FeFe]-Hydrogenase Facilitates Bidirectional Proton Transfer

2019 ◽  
Author(s):  
Moritz Senger ◽  
Viktor Eichmann ◽  
Konstantin Laun ◽  
Jifu Duan ◽  
Florian Wittkamp ◽  
...  
Keyword(s):  
Amino Acid ◽  
Proton Transfer ◽  
Active Site ◽  
Molecular Hydrogen ◽  
H2 Production ◽  
Amino Acid Residues ◽  
Difference Spectroscopy ◽  
Dynamic Changes ◽  
In Situ Ir

Hydrogenases are metalloenzymes that catalyse the interconversion of protons and molecular hydrogen, H2. [FeFe]-hydrogenases show particularly high rates of hydrogen turnover and have inspired numerous compounds for biomimetic H2 production. Two decades of research on the active site cofactor of [FeFe]-hydrogenases have put forward multiple models of the catalytic proceedings. In comparison, understanding of the catalytic proton transfer is poor. We were able to identify the amino acid residues forming a proton transfer pathway between active site cofactor and bulk solvent; however, the exact mechanism of catalytic proton transfer remained inconclusive. Here, we employ in situ IR difference spectroscopy on the [FeFe]-hydrogenase from Chlamydomonas reinhardtii evaluating dynamic changes in the hydrogen-bonding network upon catalytic proton transfer. Our analysis allows for a direct, molecular unique assignment to individual amino acid residues. We found that transient protonation changes of arginine and glutamic acid residues facilitate bidirectional proton transfer in [FeFe]-hydrogenases.<br>

CO2 Capture Using Calcium Oxide Applicable to In-Situ Separation of CO2 From H2 Production Processes

2013 ◽  
Author(s):  
Saeed Danaei Kenarsari ◽  
Yuan Zheng
Keyword(s):  
Calcium Oxide ◽  
Co2 Capture ◽  
Fixed Bed ◽  
H2 Production ◽  
Fixed Bed Reactor ◽  
Capture Process ◽  
Conversion Rates ◽  
In Situ Separation ◽  
Separation Of Co2

A lab-scale CO2 capture system is designed, fabricated, and tested for performing CO2 capture via carbonation of very fine calcium oxide (CaO) with particle size in micrometers. This system includes a fixed-bed reactor made of stainless steel (12.7 mm in diameter and 76.2 mm long) packed with calcium oxide particles dispersed in sand particles; heated and maintained at a certain temperature (500–550°C) during each experiment. The pressure along the reactor can be kept constant using a back pressure regulator. The conditions of the tests are relevant to separation of CO2 from combustion/gasification flue gases and in-situ CO2 capture process. The inlet flow, 1% CO2 and 99% N2, goes through the reactor at the flow rate of 150 mL/min (at standard conditions). The CO2 percentage of the outlet gas is monitored and recorded by a portable CO2 analyzer. Using the outlet composition, the conversion of calcium oxide is figured and employed to develop the kinetics model. The results indicate that the rates of carbonation reactions considerably increase with raising the temperature from 500°C to 550°C. The conversion rates of CaO-carbonation are well fitted to a shrinking core model which combines chemical reaction controlled and diffusion controlled models.

An in-situ DRIFTS-MS study of the photocatalytic H2 production from ethanol(aq) vapour over Pt/TiO2 and Pt Ga/TiO2 catalysts

2018 ◽  
Vol 43 (35) ◽  
pp. 16922-16928 ◽  
Author(s):  
Alberto C. Sola ◽  
Narcís Homs ◽  
Pilar Ramírez de la Piscina
Keyword(s):  
H2 Production ◽  
In Situ Drifts

Low-temperature alkaline pyrolysis of sewage sludge for enhanced H2 production with in-situ carbon capture

2019 ◽  
Vol 44 (16) ◽  
pp. 8020-8027 ◽  
Author(s):  
Ming Zhao ◽  
Fan Wang ◽  
Yiran Fan ◽  
Abdul Raheem ◽  
Hui Zhou
Keyword(s):  
Sewage Sludge ◽  
Low Temperature ◽  
Carbon Capture ◽  
H2 Production

scholarly journals 2D/2D Pomelo Peel Graphene/g-C3N4/Cu in situ for Enhancing Photocatalytic H2 Production under Visible Light Irradiation

2020 ◽  
Author(s):  
Bingbiao Li ◽  
Zhixiong Xu ◽  
Heping Zeng
Keyword(s):  
Hydrogen Evolution ◽  
Graphene Nanosheets ◽  
H2 Production ◽  
Dimensional Structure ◽  
Gas Stripping ◽  
Pomelo Peel ◽  
Stripping Method ◽  
Activating Agent ◽  
Preset Temperature

Pomelo peel was firstly used as the precursor with activating agent KHCO3 to prepare few layered graphene nanosheets (GS) through gas stripping method. The precursor graphitized and transformed to few layered graphene nanosheets gradually because of the preset temperature program and KHCO3. GS-4-1100, possessed the highest graphitization (ID/IG = 0.14, I2D/IG = 0.923) in 2~3 layers, at the edges. Taking advantages of the excellent electronic transmission performance and unique two-dimensional structure of both graphene and porous graphitic carbon nitride (g-C3N4), 2D/2D graphene/g-C3N4 nanosheet composite was fabricated for photocatalytic hydrogen evolution. The results showed that nano-copper (Cu NPs) performed the hydrogen evolution rate of 1.09 mmol g−1 h−1, while that of GS/CN-2 reached 2.91 mmol g−1 h−1 with in situ 5.49wt% Cu NPs. GS/CN-2/Cu turned out to be a stable and clean photocatalyst for hydrogen production.

scholarly journals Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 457 ◽  
Author(s):  
Sher Ling Lee ◽  
Chi-Jung Chang
Keyword(s):  
Recent Progress ◽  
Light Trapping ◽  
Metal Sulfide ◽  
H2 Production ◽  
Electronic Density ◽  
Characterization Methods ◽  
Composite Photocatalysts ◽  
Recent Developments ◽  
Sacrificial Agent

Metal sulfide-based photocatalysts have gained much attention due to their outstanding photocatalytic properties. This review paper discusses recent developments on metal sulfide-based nanomaterials for H2 production, acting as either photocatalysts or cocatalysts, especially in the last decade. Recent progress on key experimental parameters, in-situ characterization methods, and the performance of the metal sulfide photocatalysts are systematically discussed, including the forms of heterogeneous composite photocatalysts, immobilized photocatalysts, and magnetically separable photocatalysts. Some methods have been studied to solve the problem of rapid recombination of photoinduced carriers. The electronic density of photocatalysts can be investigated by in-situ C K-edge near edge X-ray absorption fine structure (NEXAFS) spectra to study the mechanism of the photocatalytic process. The effects of crystal properties, nanostructure, cocatalyst, sacrificial agent, electrically conductive materials, doping, calcination, crystal size, and pH on the performance of composite photocatalysts are presented. Moreover, the facet effect and light trapping (or light harvesting) effect, which can improve the photocatalytic activity, are also discussed.

Sign in / Sign up

Export Citation Format

Share Document