Functions of MnO in NaCl Aqueous Solution for Artificial Photosynthesis.

iScience

Global Zero Emission Research Center (GZR), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki. 305-8565, Japan.

Published: October 2020


Category Ranking

98%

Total Visits

921

Avg Visit Duration

2 minutes

Citations

20

Article Abstract

Photoelectrochemical water splitting has been intensively investigated as artificial photosynthesis technology to convert solar energy into chemical energy. The use of seawater and salted water has advantages for minimum environmental burden; however, the oxidation of Cl ion to hypochlorous acid (HClO), which has toxicity and heavy corrosiveness, should occur at the anode, along with the oxygen evolution. Here, O and HClO production in aqueous solution containing Cl on photoanodes modified with various metal oxides was investigated. The modification of MnO resulted in the promotion of the O evolution reaction (OER) specifically without HClO production over a wide range of conditions. The results will contribute not only to the practical application of artificial photosynthesis using salted water but also to the elucidation of substantial function of manganese as the element for OER center in natural photosynthesis.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7584672PMC
http://dx.doi.org/10.1016/j.isci.2020.101540DOI Listing

Publication Analysis

Top Keywords

artificial photosynthesis
12
aqueous solution
8
salted water
8
hclo production
8
functions mno
4
mno nacl
4
nacl aqueous
4
solution artificial
4
photosynthesis
4
photosynthesis photoelectrochemical
4

Similar Publications

Hydrogen Radical Mediated Concerted Electron-Proton Transfer in 1D Sulfone-based Covalent Organic Framework for Boosting Photosynthesis of HO.

Angew Chem Int Ed Engl

September 2025

College of Smart Materials and Future Energy, Fudan University, Songhu Road 2005, Shanghai, 200438, P.R. China.

Solar-driven photocatalytic oxygen reduction reaction using covalent organic frameworks (COFs) offers a promising approach for sustainable hydrogen peroxide (HO) production. Despite their advantages, the reported COFs-based photocatalysts suffer insufficient photocatalytic HO efficiency due to the mismatched electron-proton dynamics. Herein, we report three one-dimensional (1D) COF photocatalysts for efficient HO production via the hydrogen radical (H•) mediated concerted electron-proton transfer (CEPT) process.

View Article and Find Full Text PDF

Background: Solar radiation is a primary constraint in silvoarable agroforestry, with yield losses near the trees well documented in temperate climates. However, genetic variability for shade tolerance remains largely unexplored. This 2-year field trial investigated the impact of artificial shading - using nets that reduced photosynthetically active radiation (PAR) by moderate (-30%) and severe (-50%) levels relative to full sun - on the morpho-physiology and yield of common wheat.

View Article and Find Full Text PDF

Microbial-photoelectrochemical cell for the conversion of raw cellulose materials into electrical power and chemicals.

Biosens Bioelectron

August 2025

Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, 3200003, Haifa, Israel; The Resnick Sustainable Center for Catalysis, Technion - Israel Institute of Technology, 3200003, Haifa, Israel; Nancy and Stephen Grand Technion Energy Program, Technion - Israel Instit

Exploiting biomass as a fuel source has attracted increasing attention over the last few decades. Combined biotic-abiotic systems can enhance conversion efficiency, but biotic reactions often require oxygen-free conditions, which are hindered by oxygen evolution at the photoanode. Herein, we develop a modular microbial-photoelectrochemical cell (MPEC) that facilitates the one-pot degradation and light-induced conversion of cellulosic material into electrical power and added-value compounds.

View Article and Find Full Text PDF

Photocatalytic HO Production with a Nearly 2% Solar-to-Chemical Conversion Efficiency via a Dedicated Construction of Redox Centers in Metal-Organic Frameworks.

Angew Chem Int Ed Engl

September 2025

Frontiers Science Center for High Energy Material, Key Laboratory of Cluster Science, Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Interdisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technol

Hydrogen peroxide (HO) is a green oxidant widely used in a variety of industries. Photocatalytic generation of HO from water and oxygen by sunlight is an appealing strategy compared to the high energy consumption of the industrial anthraquinone process. However, the low activity and selectivity of the two-step single-electron oxygen reduction reaction (ORR) during the photocatalytic process greatly restricts the HO production efficiency.

View Article and Find Full Text PDF

Lanthanum-assisted lattice anchoring of iridium in CoO for efficient oxygen evolution reaction in low-iridium water electrolysis.

Nat Commun

August 2025

Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, China.

The use of single-atom catalysts is an effective way to reduce the amount of iridium in proton exchange membrane water electrolysis (PEM-WE). However, conventional methods can only obtain surface-loaded single atoms or clusters which cannot meet the needs of high current density and stability. In this study, assisted by lanthanum-doping-induced ion exchange, we realize atomically anchoring iridium within the CoO lattice.

View Article and Find Full Text PDF