scholarly journals Co/CoO nanoparticles immobilized on Co–N-doped carbon as trifunctional electrocatalysts for oxygen reduction, oxygen evolution and hydrogen evolution reactions

2016 ◽  
Vol 52 (35) ◽  
pp. 5946-5949 ◽  
Author(s):  
Xian Zhang ◽  
Rongrong Liu ◽  
Yipeng Zang ◽  
Guoqiang Liu ◽  
Guozhong Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Carbon Nanodots ◽  
Shrimp Shell ◽  
Hydrogen Evolution Reactions ◽  
Coo Nanoparticles

A Co/CoO@Co–N–C composite was fabricated using shrimp-shell derived N-doped carbon nanodots as precursor, exhibiting superior trifunctional ORR/OER/HER catalytic activity.

MOF-derived electrocatalysts for oxygen reduction, oxygen evolution and hydrogen evolution reactions

2020 ◽  
Vol 49 (5) ◽  
pp. 1414-1448 ◽  
Author(s):  
Hao-Fan Wang ◽  
Liyu Chen ◽  
Huan Pang ◽  
Stefan Kaskel ◽  
Qiang Xu
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Composition Design ◽  
Hydrogen Evolution Reactions ◽  
Carbon Based

The morphology and composition design of MOF-derived carbon-based materials and their applications for electrocatalytic ORR, OER and HER are reviewed.

Metallic single-atoms confined in carbon nanomaterials for the electrocatalysis of oxygen reduction, oxygen evolution, and hydrogen evolution reactions

2020 ◽  
Vol 10 (19) ◽  
pp. 6420-6448 ◽  
Author(s):  
Mohd. Khalid ◽  
Prerna A. Bhardwaj ◽  
Ana M. B. Honorato ◽  
Hamilton Varela
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Carbon Nanomaterials ◽  
Review Article ◽  
Single Atom ◽  
Single Atoms ◽  
Recent Advances ◽  
Hydrogen Evolution Reactions

Recent advances of single-atom-based carbon nanomaterials for the ORR, OER, HER, and bifunctional electrocatalysis are covered in this review article.

Electrochemistry of layered GaSe and GeS: applications to ORR, OER and HER

2016 ◽  
Vol 18 (3) ◽  
pp. 1699-1711 ◽  
Author(s):  
Shu Min Tan ◽  
Chun Kiang Chua ◽  
David Sedmidubský ◽  
Zdenĕk Sofer ◽  
Martin Pumera
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Electrochemical Sensing ◽  
Metal Chalcogenides ◽  
Hydrogen Evolution Reactions

The study of the inherent electrochemistry of layered metal chalcogenides, GaSe and GeS, was performed. In particular, their impact towards the electrochemical sensing of redox probes as well as catalysis of oxygen reduction, oxygen evolution and hydrogen evolution reactions was examined.

scholarly journals Nitrogen-Doped Porous Carbon Derived from Biomass Used as Trifunctional Electrocatalyst toward Oxygen Reduction, Oxygen Evolution and Hydrogen Evolution Reactions

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 76 ◽  
Author(s):  
Chinnusamy Sathiskumar ◽  
Shanmugam Ramakrishnan ◽  
Mohanraj Vinothkannan ◽  
Ae Rhan Kim ◽  
Srinivasan Karthikeyan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Porous Carbon ◽  
Photoelectron Spectroscopy ◽  
Energy Storage And Conversion ◽  
X Ray ◽  
Metal Free ◽  
Hydrogen Evolution Reactions

Tremendous developments in energy storage and conversion technologies urges researchers to develop inexpensive, greatly efficient, durable and metal-free electrocatalysts for tri-functional electrochemical reactions, namely oxygen reduction reactions (ORRs), oxygen evolution reactions (OERs) and hydrogen evolution reactions (HERs). In these regards, this present study focuses upon the synthesis of porous carbon (PC) or N-doped porous carbon (N-PC) acquired from golden shower pods biomass (GSB) via solvent-free synthesis. Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies confirmed the doping of nitrogen in N-PC. In addition, morphological analysis via field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) provide evidence of the sheet-like porous structure of N-PC. ORR results from N-PC show the four-electron pathway (average n = 3.6) for ORRs with a Tafel slope of 86 mV dec−1 and a half-wave potential of 0.76 V. For OERs and HERs, N-PC@Ni shows better overpotential values of 314 and 179 mV at 10 mA cm−2, and its corresponding Tafel slopes are 132 and 98 mV dec−1, respectively. The chronopotentiometry curve of N-PC@Ni reveals better stability toward OER and HER at 50 mA cm−2 for 8 h. These consequences provide new pathways to fabricate efficient electrocatalysts of metal-free heteroatom-doped porous carbon from bio-waste/biomass for energy application in water splitting and metal air batteries.

scholarly journals A Molecular Tetrahedral Cobalt–Seleno-Based Complex as an Efficient Electrocatalyst for Water Splitting

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 945
Author(s):  
Ibrahim Munkaila Abdullahi ◽  
Jahangir Masud ◽  
Polydoros-Chrisovalantis Ioannou ◽  
Eleftherios Ferentinos ◽  
Panayotis Kyritsis ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
High Mass ◽  
Alkaline Solutions ◽  
Hydrogen Evolution Reactions ◽  
Mass Activity ◽  
Turn Over Frequency ◽  
Turn Over

The cobalt–seleno-based coordination complex, [Co{(SePiPr2)2N}2], is reported with respect to its catalytic activity in oxygen evolution and hydrogen evolution reactions (OER and HER, respectively) in alkaline solutions. An overpotential of 320 and 630 mV was required to achieve 10 mA cm−2 for OER and HER, respectively. The overpotential for OER of this CoSe4-containing complex is one of the lowest that has been observed until now for molecular cobalt(II) systems, under the reported conditions. In addition, this cobalt–seleno-based complex exhibits a high mass activity (14.15 A g−1) and a much higher turn-over frequency (TOF) value (0.032 s−1) at an overpotential of 300 mV. These observations confirm analogous ones already reported in the literature pertaining to the potential of molecular cobalt–seleno systems as efficient OER electrocatalysts.

Electrospun Carbon Nanofibers Encapsulated with NiCoP: A Multifunctional Electrode for Supercapattery and Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution Reactions

2018 ◽  
Vol 8 (20) ◽  
pp. 1800555 ◽  
Author(s):  
Subramani Surendran ◽  
Sathyanarayanan Shanmugapriya ◽  
Arumugam Sivanantham ◽  
Sangaraju Shanmugam ◽  
Ramakrishnan Kalai Selvan
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Carbon Nanofibers ◽  
Hydrogen Evolution Reactions
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