High Surface Area MnO2 Nanomaterials Synthesized by Selective Cation Dissolution for Efficient Water Oxidation

Author(s):  
Ravi Kumar Kunchala ◽  
Pushpendra . ◽  
Rimple Kalia ◽  
Sanyasinaidu Boddu

Artificial photosynthesis is a promising method that directly transforms solar energy into chemical energy. To achieve artificial photosynthesis, efficient water oxidation catalysts (WOCs) are essential. In nature, the manganese-oxo-calcium cluster...

2015 ◽  
Vol 44 (25) ◽  
pp. 11592-11600 ◽  
Author(s):  
Li-Jing Zhou ◽  
Xiaoxi Huang ◽  
Hui Chen ◽  
Panpan Jin ◽  
Guo-Dong Li ◽  
...  

A high surface area flower-like Ni–Fe LDH was shown to be a water oxidation catalyst.


2015 ◽  
Vol 44 (35) ◽  
pp. 15441-15449 ◽  
Author(s):  
Mohammad Mahdi Najafpour ◽  
Emad Amini

We used halloysite, a nano-sized natural mineral and high surface area montmorillonite as supports for nano-sized Mn oxides to synthesize efficient water-oxidising catalysts.


2018 ◽  
Vol 6 (4) ◽  
pp. 1639-1647 ◽  
Author(s):  
Linjie Zhang ◽  
Taoqing Mi ◽  
Muhammad Asad Ziaee ◽  
Linfeng Liang ◽  
Ruihu Wang

Co3O4/CoMoO4 nanocages with an ultrafine crystallite size and high surface area derived from hollow H3PMo12O40@ZIF-67 hybrids exhibit high-performance for electrocatalytic oxygen evolution.


Author(s):  
Nathan Siegel ◽  
Richard Diver ◽  
James E. Miller ◽  
Terry Garino ◽  
Stephanie Livers

Metal-oxide based thermochemical cycles, such as those including a class of iron containing materials commonly known as ferrites, involve two reaction steps: a thermal reduction at temperatures up to 1600 °C driven by a solar energy input, and a lower temperature exothermic oxidation in the presence of either carbon dioxide or water. In order to maximize performance, the reactive materials must be arranged into structures that provide an effective interface for the direct absorption of concentrated solar energy and also have relatively high surface area to support rapid chemical reactions. In this paper we discuss the attributes of reactive structures for solar thermochemical processes as well as some of the fabrication techniques currently under development at Sandia National Labs. One of these structures has been demonstrated on-sun in a two step carbon dioxide splitting cycle. The results, given in this paper, indicate that performance may be improved as the fraction of the total directly illuminated surface area is increased, reducing the need to rely on conduction or convection to distribute heat throughout the material.


2015 ◽  
Vol 3 (4) ◽  
pp. 1587-1593 ◽  
Author(s):  
Ioannis Papadas ◽  
Joseph A. Christodoulides ◽  
George Kioseoglou ◽  
Gerasimos S. Armatas

A mesoporous BiFeO3 semiconductor, possessing a large internal surface area, regular pore structure and highly crystalline walls, exhibits excellent oxygen evolution reaction performance with long-term cycling stability.


RSC Advances ◽  
2017 ◽  
Vol 7 (79) ◽  
pp. 50040-50043 ◽  
Author(s):  
Chunjing Shi ◽  
Xiaoli Dong ◽  
Yuchen Hao ◽  
Xiuying Wang ◽  
Hongchao Ma ◽  
...  

In this study, we demonstrated that a novel controllable nano-sheet assembled Bi2MoO6 micronbox had higher activity for nitrogen fixation and dye degradation.


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