scholarly journals MnS-Nanoparticles-Decorated Three-Dimensional Graphene Hybrid as Highly Efficient Bifunctional Electrocatalyst for Hydrogen Evolution Reaction and Oxygen Reduction Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1141
Author(s):  
Khalil ur Rehman ◽  
Shaista Airam ◽  
Long Song ◽  
Jian Gao ◽  
Qiang Guo ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Manganese Sulfide ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Renewable Energy Resources ◽  
Bifunctional Electrocatalyst

The search for renewable energy resources has attracted considerable research interests in electrochemical reactions of hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) that are essential for fuel cells. Earth-abundant, eco-friendly and cost-effective transition metal compounds are emerging candidates as electrocatalysts in these reactions. Herein, we report the growth of manganese sulfide nanoparticles on three-dimensional graphene, through an easy, progressive successive ionic layer adsorption and reaction (SILAR) method, where manganese sulfide nanoparticles (MnS-NPs), diameter of 4–5 nm are homogeneously decorated on the 3D graphene matrix. The formed hybrid shows improved HER activity in 0.1 M KOH when compared to bulk MnS. Moreover, MnS-NPs@3DG is also active in catalyzing ORR, qualifying it as a new type of bifunctional electrocatalyst in alkaline media.

scholarly journals Rh particles in N-doped porous carbon materials derived from ZIF-8 as an efficient bifunctional electrocatalyst for the ORR and HER

RSC Advances ◽  
2021 ◽  
Vol 11 (23) ◽  
pp. 13906-13911
Author(s):  
Can Sun ◽  
Xinde Duan ◽  
Jiajun Song ◽  
Mengxian Zhang ◽  
Yachao Jin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Reduction Reaction ◽  
Bifunctional Electrocatalyst ◽  
Porous Carbon Materials

ZIF-derived RhNC-900 bifunctional electrocatalysts for the oxygen reduction reaction and hydrogen evolution reaction have been prepared via a simple and scalable method, exhibiting excellent catalytic activity and promising performance.

scholarly journals Oxygen Reduction Reaction and Hydrogen Evolution Reaction Catalyzed by Pd–Ru Nanoparticles Encapsulated in Porous Carbon Nanosheets

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 329 ◽  
Author(s):  
Juntai Tian ◽  
Wen Wu ◽  
Zhenghua Tang ◽  
Yuan Wu ◽  
Robert Burns ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Porous Carbon ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Carbon Nanosheets ◽  
X Ray ◽  
Ru Nanoparticles

Developing bi-functional electrocatalysts for both oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) is crucial for enhancing the energy transfer efficiency of metal–air batteries and fuel cells, as well as producing hydrogen with a high purity. Herein, a series of Pd–Ru alloyed nanoparticles encapsulated in porous carbon nanosheets (CNs) were synthesized and employed as a bifunctional electrocatalyst for both ORR and HER. The TEM measurements showed that Pd–Ru nanoparticles, with a size of approximately 1–5 nm, were uniformly dispersed on the carbon nanosheets. The crystal and electronic structures of the PdxRu100−x/CNs series were revealed by powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The as-prepared samples exhibited effective ORR activity in alkaline media and excellent HER activity in both alkaline and acid solutions. The Pd50Ru50/CNs sample displayed the best activity and stability among the series, which is comparable and superior to that of commercial 10% Pd/C. For ORR, the Pd50Ru50/CNs catalyst exhibited an onset potential of 0.903 V vs. RHE (Reversible Hydrogen Electrode) and 11.4% decrease of the current density after 30,000 s of continuous operation in stability test. For HER, the Pd50Ru50/CNs catalyst displayed an overpotential of 37.3 mV and 45.1 mV at 10 mA cm−2 in 0.1 M KOH and 0.5 M H2SO4, respectively. The strategy for encapsulating bimetallic alloys within porous carbon materials is promising for fabricating sustainable energy toward electrocatalysts with multiple electrocatalytic activities for energy related applications.

Recent progress in pristine MOF-based catalysts for electrochemical hydrogen evolution, oxygen evolution and oxygen reduction

2021 ◽  
Author(s):  
Lili Fan ◽  
Zixi Kang ◽  
Mengfei Li ◽  
Daofeng Sun
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Recent Progress ◽  
Metal Organic Frameworks ◽  
Reduction Reaction ◽  
Metal Organic

Among various kinds of materials that have been investigated as electrocatalysts for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), metal-organic frameworks (MOFs) emerge as...

scholarly journals Fabrication of Conjugated Porous Polymer Catalysts for Oxygen Reduction Reactions: A Bottom-Up Approach

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1224
Author(s):  
Sujoy Bandyopadhyay ◽  
Su Ryong Ha ◽  
M. Alam Khan ◽  
Cheongbeom Lee ◽  
Hong In Jeong ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Density Functional ◽  
Condensation Reaction ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Porous Polymer ◽  
Alkaline Media ◽  
Dimensional Structure ◽  
Electron Transfer Mechanism

The present study demonstrates the fabrication of a conjugated porous polymer (CPP-P2) through a Pd-catalyzed Suzuki–Miyaura poly-condensation reaction. 13C cross-polarization solid-state NMR and Fourier transform infrared (FTIR) spectroscopy were used to characterize CPP-P2. Pristine nitrogen-containing CPP was explored as a catalyst for the oxygen reduction reaction in 0.1 M KOH aqueous alkaline media. In the case of CPP-P2,the polymer oxygen reduction reaction occurs via a four-electron transfer mechanism. An understanding of the oxygen reduction at the molecular level and the role of molecular packing in the three-dimensional structure was proposed based on density functional theory (DFT) modeling.

Sign in / Sign up

Export Citation Format

Share Document