scholarly journals Efficient solar hydrogen production from neutral electrolytes using surface-modified Cu(In,Ga)Se2photocathodes

2015 ◽  
Vol 3 (16) ◽  
pp. 8300-8307 ◽  
Author(s):  
Hiromu Kumagai ◽  
Tsutomu Minegishi ◽  
Naotoshi Sato ◽  
Taro Yamada ◽  
Jun Kubota ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Buffer Solution ◽  
Solar Hydrogen ◽  
Thin Conductor ◽  
Solar Hydrogen Production ◽  
Surface Modified

Surface thin conductor layers enhance sunlight driven hydrogen evolution from water using Cu(In,Ga)Se2photocathodes in a concentrated phosphate buffer solution.

A multi-stacked hyperporous silicon flake for highly active solar hydrogen production

2016 ◽  
Vol 52 (67) ◽  
pp. 10221-10224 ◽  
Author(s):  
Youn Jeong Jang ◽  
Jaegeon Ryu ◽  
Dongki Hong ◽  
Soojin Park ◽  
Jae Sung Lee
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Chemical Reduction ◽  
Production Performance ◽  
Natural Clay ◽  
Solar Hydrogen ◽  
Highly Active ◽  
Selective Chemical ◽  
Solar Hydrogen Production

3D multi-stacked Si flakes have been successfully fabricatedviathe selective chemical reduction of natural clay on the strength of an inherently negative catalyst. Their solar-driven hydrogen production performance scored as the highest Si-based photocatalyst for hydrogen evolution with superior stability.

Highly efficient electrocatalytic hydrogen evolution from neutral aqueous solution by a water-soluble anionic cobalt(ii) porphyrin

2015 ◽  
Vol 51 (81) ◽  
pp. 15067-15070 ◽  
Author(s):  
Belete B. Beyene ◽  
Sandeep B. Mane ◽  
Chen-Hsiung Hung
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Evolution ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Water Soluble ◽  
Applied Potential ◽  
Buffer Solution ◽  
Faradaic Efficiency ◽  
Highly Efficient ◽  
Neutral Aqueous Solution

CoTPPS is an efficient electrocatalyst for H2 generation from neutral phosphate buffer solution. It features quantitative Faradaic efficiency with a TOF of ∼1.83 s−1 and a TON of 1.9 × 104 mol of H2 per mole of catalyst at an applied potential of −1.29 V (vs. SHE).

Effects of Phosphate Buffer Solution on Fermentative Biohydrogen Production of Biohydrogenbacterium R3 sp.nov.

2010 ◽  
Vol 113-116 ◽  
pp. 2185-2188
Author(s):  
Tao Zhao ◽  
Jing Li Xu ◽  
Hong Chen ◽  
Yong Feng Li
Keyword(s):  
Cell Growth ◽  
Hydrogen Production ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Clean Energy ◽  
Biohydrogen Production ◽  
Hydrogen Energy ◽  
Hydrogen Yield ◽  
Buffer Solution ◽  
Biogas Yield

As a kind of clean energy with great potential, hydrogen energy has been a hotspot worldwide. Based on the recent research on biohydrogen production, this paper investigated the effects of phosphate buffer solution (PBS:K2HPO4+KH2PO4) to the cell growth and hydrogen production ration to Biohydrogenbacterium R3 sp.nov.. The results found that: the biogas yield, hydrogen yield and specific hydrogen production ration had the maximum of 3860 ml/L, 1832.7 mlH2/L and 2.6324 mmol H2/g•cell•h when the concentration of PBS was 0.15 mol. The pH maintained at 4~5 when the concentration of PBS ranged from 0.01~0.15 mol but the system collapsed when the concentration of PBS exceeded 0.3 mol.

A highly stable CuS and CuS–Pt modified Cu2O/CuO heterostructure as an efficient photocathode for the hydrogen evolution reaction

2016 ◽  
Vol 4 (6) ◽  
pp. 2205-2216 ◽  
Author(s):  
Amare Aregahegn Dubale ◽  
Andebet Gedamu Tamirat ◽  
Hung-Ming Chen ◽  
Taame Abraha Berhe ◽  
Chun-Jern Pan ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production

A Cu2O/CuO heterostructure modified with CuS is proposed as a highly promising and stable photocathode for solar hydrogen production.

scholarly journals Controlled Biosynthesis of ZnCdS Quantum Dots with Visible-Light-Driven Photocatalytic Hydrogen Production Activity

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1357
Author(s):  
Shiyue Qi ◽  
Yahui Miao ◽  
Ji Chen ◽  
Huichao Chu ◽  
Bingyang Tian ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Large Scale ◽  
High Efficiency ◽  
Extracellular Proteins ◽  
Molar Ratio ◽  
Solar Hydrogen ◽  
Production Activity ◽  
Solar Hydrogen Production

The development of visible-light-responsive photocatalysts with high efficiency, stability, and eco-friendly nature is beneficial to the large-scale application of solar hydrogen production. In this work, the production of biosynthetic ternary ZnCdS photocatalysts (Eg = 2.35–2.72 eV) by sulfate-reducing bacteria (SRB) under mild conditions was carried out for the first time. The huge amount of biogenic S2− and inherent extracellular proteins (EPs) secreted by SRB are important components of rapid extracellular biosynthesis. The ternary ZnCdS QDs at different molar ratios of Zn2+and Cd2+ from 15:1 to 1:1 were monodisperse spheres with good crystallinity and average crystallite size of 6.12 nm, independent of the molar ratio of Cd2+ to Zn2+. All the ZnCdS QDs had remarkable photocatalytic activity and stability for hydrogen evolution under visible light, without noble metal cocatalysts. Especially, ZnCdS QDs at Zn/Cd = 3:1 showed the highest H2 production activity of 3.752 mmol·h−1·g−1. This excellent performance was due to the high absorption of visible light, the high specific surface area, and the lower recombination rate between photoexcited electrons and holes. The adhered inherent EPs on the ZnCdS QDs slowed down the photocorrosion and improved the stability in photocatalytic hydrogen evolution. This study provides a new direction for solar hydrogen production.

scholarly journals Efficiency gains for thermally coupled solar hydrogen production in extreme cold

2021 ◽  
Author(s):  
Moritz Kölbach ◽  
Kira Rehfeld ◽  
Matthias M. May
Keyword(s):  
Hydrogen Production ◽  
Thermal Coupling ◽  
Efficiency Gains ◽  
Solar Hydrogen ◽  
World Regions ◽  
Extreme Cold ◽  
Solar Hydrogen Production

We analyse the potential of solar hydrogen production in remote and cold world regions such as Antarctica and quantify the efficiency benefits of thermal coupling.

scholarly journals Electrochemical Hydrogen Production Powered by PV/CSP Hybrid Power Plants: A Modelling Approach for Cost Optimal System Design

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3437
Author(s):  
Andreas Rosenstiel ◽  
Nathalie Monnerie ◽  
Jürgen Dersch ◽  
Martin Roeb ◽  
Robert Pitz-Paal ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Power Plants ◽  
Large Scale ◽  
Energy System ◽  
Solar Hydrogen ◽  
Energy System Model ◽  
Optimal System Design ◽  
Solar Hydrogen Production ◽  
Electrochemical Water Splitting ◽  
Climate Neutrality

Global trade of green hydrogen will probably become a vital factor in reaching climate neutrality. The sunbelt of the Earth has a great potential for large-scale hydrogen production. One promising pathway to solar hydrogen is to use economically priced electricity from photovoltaics (PV) for electrochemical water splitting. However, storing electricity with batteries is still expensive and without storage only a small operating capacity of electrolyser systems can be reached. Combining PV with concentrated solar power (CSP) and thermal energy storage (TES) seems a good pathway to reach more electrolyser full load hours and thereby lower levelized costs of hydrogen (LCOH). This work introduces an energy system model for finding cost-optimal designs of such PV/CSP hybrid hydrogen production plants based on a global optimization algorithm. The model includes an operational strategy which improves the interplay between PV and CSP part, allowing also to store PV surplus electricity as heat. An exemplary study for stand-alone hydrogen production with an alkaline electrolyser (AEL) system is carried out. Three different locations with different solar resources are considered, regarding the total installed costs (TIC) to obtain realistic LCOH values. The study shows that a combination of PV and CSP is an auspicious concept for large-scale solar hydrogen production, leading to lower costs than using one of the technologies on its own. For today’s PV and CSP costs, minimum levelized costs of hydrogen of 4.04 USD/kg were determined for a plant located in Ouarzazate (Morocco). Considering the foreseen decrease in PV and CSP costs until 2030, cuts the LCOH to 3.09 USD/kg while still a combination of PV and CSP is the most economic system.

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