Surface in situ self-reconstructing hierarchical structures derived from ferrous carbonate as efficient bifunctional iron-based catalysts for oxygen and hydrogen evolution reactions

2020 ◽  
Vol 8 (35) ◽  
pp. 18367-18375
Author(s):  
Taotao Gao ◽  
Caixia Zhou ◽  
Xiaojuan Chen ◽  
Zhihan Huang ◽  
Hongyan Yuan ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hierarchical Structures ◽  
Catalytic Performance ◽  
Surface Corrosion ◽  
Hydrogen Evolution Reactions ◽  
Iron Based ◽  
Ferrous Carbonate ◽  
Iron Based Catalysts

The FeCO3@IF electrode based on Fe2(SO4)3 as iron resource shows efficient catalytic performance for both OER and HER due to the unique in situ self-reconstructing hierarchical structures induced by the surface corrosion of FeCO3 compounds.

Synthesis of ultrafine NiMoO4 nano-rods for excellent electro-catalytic performance in hydrogen evolution reactions

2019 ◽  
Vol 257 ◽  
pp. 126696 ◽  
Author(s):  
Jahangeer Ahmed ◽  
Mohd Ubiadullah ◽  
Norah Alhokbany ◽  
Saad M. Alshehri
Keyword(s):  
Hydrogen Evolution ◽  
Catalytic Performance ◽  
Hydrogen Evolution Reactions ◽  
Nano Rods

scholarly journals In Situ Formation of Surface-Induced Oxygen Vacancies in Co9S8/CoO/NC as a Bifunctional Electrocatalyst for Improved Oxygen and Hydrogen Evolution Reactions

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2237
Author(s):  
Khalil ur Rehman ◽  
Shaista Airam ◽  
Xiangyun Lin ◽  
Jian Gao ◽  
Qiang Guo ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Oxygen Vacancies ◽  
Cost Effective ◽  
Bifunctional Electrocatalyst ◽  
Catalytic Activities ◽  
Oxygen Defects ◽  
Hydrogen Evolution Reactions ◽  
Nitrogen Doped Carbon ◽  
Coo Nanoparticles

Creating oxygen vacancies and introducing heterostructures are two widely used strategies in Co-based oxides for their efficient electrocatalytic performance, yet both strategies have rarely been used together to design a bifunctional electrocatalyst for an efficient overall water splitting. Herein, we propose a facile strategy to synthesize oxygen-defect-rich Co9S8/CoO hetero-nanoparticles with a nitrogen-doped carbon shell (ODR-Co9S8/CoO/NC) through the in situ conversion of heterojunction along with surface-induced oxygen vacancies, simply via annealing the precursor Co3S4/Co(OH)2/ZIF-67. The as-prepared ODR-Co9S8/CoO/NC shows excellent bifunctional catalytic activities, featuring a low overpotential of 217 mV at 10 mA cm−2 in the oxygen evolution reaction (OER) and 160 mV at 10 mA cm−2 in the hydrogen evolution reaction (HER). This performance excellency is attributed to unique heterostructure and oxygen defects in Co9S8/CoO nanoparticles, the current work is expected to offer new insights to the design of cost-effective, noble-metal-free electrocatalysts.

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