Oxygen Reduction Reaction: Engineering of a Low‐Cost, Highly Active, and Durable Tantalate–Graphene Hybrid Electrocatalyst for Oxygen Reduction (Adv. Energy Mater. 24/2020)

This research studied the possibility of converting water hyacinth biomass into the porous non-precious oxygen reduction reaction (ORR) electrocatalyst using a simple, low cost and scalable autogenic pressure method. The electrocatalyst was prepared by thermally annealing water hyacinth root contained ZnCl2 at 700oC under autogenic pressure conditions. The phase of the catalyst was the mixture of carbon and metal oxide. In addition, rough surface morphology and high porosity were clearly observed using scanning electron microscope. The synthesized catalyst was then determined the ORR performance by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) techniques under O2 saturated KOH solution. The ORR performance increased as the catalyst loading was increased and the optimum catalyst loading was found to be 1.5 mg/cm2 which generated the Eonset and E1/2 value of 0.93 V and 0.80 V vs. RHE, respectively. Furthermore, the E1/2 value of the synthesized catalyst was 230 and 130 mV greater than the catalyst synthesized without ZnCl2 and commercial carbon (VXC-72R). ORR durability study suggested that the prepared catalyst was durable to operate ORR for 5000 cycles in alkaline media. These results suggested that the autogenic pressure conditions would be a promising technique to prepare highly active and durable biomass derived ORR electrocatalyst.

Download Full-text

Highly Active and Durable Transition Metal-Coordinated Nitrogen Doped Carbon Electrocatalyst for Oxygen Reduction Reaction in Neutral Media

E3S Web of Conferences ◽

10.1051/e3sconf/202014101005 ◽

2020 ◽

Vol 141 ◽

pp. 01005

Author(s):

Kriangsak Ketpang ◽

Apikom Boonkitkoson ◽

Nattawan Pitipuech ◽

Chedthawut Poompipatpong ◽

Jakkid Sanetuntikul ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Precious Metal ◽

Low Cost ◽

Reduction Reaction ◽

Graphitic Carbon ◽

Metal Catalyst ◽

Highly Active ◽

Neutral Media ◽

Nitrogen Doped Carbon

The major technical obstacles in commercialization of microbial fuel cell technology are the sluggish kinetic, high cost, and poor durability of an air cathode electrocatalyst. This research aimed to synthesize the highly active, stable and low cost non-precious metal catalyst to replace the expensive Pt electrocatalyst using a simple, low cost and scalable method. The Fe3C and Fe-N-C catalysts were prepared by direct heating the precursors under autogenic pressure conditions. X-ray diffraction pattern revealed the phase of Fe3C sample was cohenite Fe3C and graphitic carbon, while the phase of Fe-N-C catalyst was only graphitic carbon. The morphology of the synthesized catalysts was a highly porous structure with nanoparticle morphology. The surface area of the Fe3C and the Fe-N-C catalysts was 295 and 377 m2 g-1, respectively. The oxygen reduction reaction (ORR) activity of Fe-N-C catalyst was more active than Fe3C catalyst. The ORR performance of Fe-N-C catalyst exhibited about 1.6 times more superior to that of the noble Pt/C catalyst. In addition, the Fe-N-C catalyst was durable to operate under neutral media. Thus, a novel autogenic pressure technique was a promising method to effectively prepare an highly active and durable non-precious metal catalyst to replace the precious Pt/C catalyst.

Download Full-text

Fe azaphthalocyanine unimolecular layers (Fe AzULs) on carbon nanotubes for realizing highly active oxygen reduction reaction (ORR) catalytic electrodes

NPG Asia Materials ◽

10.1038/s41427-019-0154-6 ◽

2019 ◽

Vol 11 (1) ◽

Cited By ~ 4

Author(s):

Hiroya Abe ◽

Yutaro Hirai ◽

Susumu Ikeda ◽

Yasutaka Matsuo ◽

Haruyuki Matsuyama ◽

...

Keyword(s):

Carbon Nanotubes ◽

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Electrode Materials ◽

Low Cost ◽

Multiwall Carbon Nanotubes ◽

Reduction Reaction ◽

Polymer Electrolyte Fuel Cells ◽

New Class ◽

Highly Active

Abstract A new class of Pt-free catalysts was designed that included molecular iron phthalocyanine (FePc) derivatives, namely, iron azaphthalocyanine (FeAzPc) unimolecular layers (Fe AzULs) adsorbed on oxidized multiwall carbon nanotubes (oxMWCNTs). FeAzPcs were dissolved in organic solvents such as dimethyl sulfoxide (DMSO), and catalytic electrodes modified with molecularly adsorbed FeAzPcs were successfully prepared. The optimized composition of the catalytic electrodes was determined, and the electrodes exhibited superior activity for the oxygen reduction reaction (ORR) and better durability than conventional FePc catalytic electrodes and commercial Pt/C due to the electron-withdrawing properties of the pyridinic nitrogen in FeAzPcs. The catalytic electrodes that were molecularly modified with FeAzPcs have higher activities than those composed of FeAzPc crystals and oxMWCNTs. To the best of our knowledge, among all of the conventional catalysts based on modified MWCNTs and oxMWCNTs, this catalyst exhibits the highest activity. Unlike other Pt-free catalytic electrodes, the Fe AzUL catalytic electrodes can be prepared by low-cost processing without pyrolysis and are therefore promising catalytic electrode materials for applications, such as polymer electrolyte fuel cells and metal–air batteries.

Download Full-text

Fabrication of Non-precious Vanadium Tungsten Nanocomposite for Enhanced Electrocatalytic Oxygen Reduction Reaction

Asian Journal of Chemistry ◽

10.14233/ajchem.2021.23097 ◽

2021 ◽

Vol 33 (4) ◽

pp. 919-924

Author(s):

L. Stanlykeninxavier ◽

P. Elangovan ◽

M.S.S. Saravanakumaar

Keyword(s):

Catalytic Activity ◽

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

High Performance ◽

High Efficiency ◽

Low Cost ◽

High Capacity ◽

Reduction Reaction ◽

Highly Active ◽

Electrocatalytic Oxygen Reduction

For the commercialization of alkaline fuel cells and metal air batteries, the advances in non-precious, cheap, stable electrocatalysts for the oxygen reduction reaction (ORR) and highly active remain a major problem. To overcome this problem, a facile approach was established to fabricate non-precious metal electrocatalysts, such as nanoparticles, pristine V2O5 and their WO3 hybrids. This is the first study reporting the utilization of monoclinic-WO3-nanocrystal-coupled V2O5 that serves as ORR catalysts. Compared with 50 wt.% WO3 with 50 wt.% V2O5 (VW-2) spheres and pristine V2O5, the hybrid catalyst of 25 wt.% WO3 and 75 wt.% V2O5 (VW-1) spheres exhibits outstanding catalytic activity towards ORR. In addition, the hybrid of 25 wt.% WO3 and 75 wt.% V2O5 (VW-1) exhibits a higher long-term durability and catalytic activity than high-quality commercial Pt/C catalysts, which renders the composites of WO3/V2O5 composites hybrid a high-capacity candidate for non-precious, high-performance, metal-based electrocatalysts having high efficiency and low cost for electrochemical energy conversion. The enhanced activity of WO3/V2O5 composites is mainly obtained from the improved structural openness in the V2O5 tunnel structure when coupled with WO3.

Download Full-text

Iron, Nitrogen Co‐Doped Carbon Spheres as Low Cost, Scalable Electrocatalysts for the Oxygen Reduction Reaction

Advanced Functional Materials ◽

10.1002/adfm.202102974 ◽

2021 ◽

pp. 2102974

Author(s):

Jingyu Feng ◽

Rongsheng Cai ◽

Emanuele Magliocca ◽

Hui Luo ◽

Luke Higgins ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Low Cost ◽

Reduction Reaction ◽

Carbon Spheres ◽

Co Doped

Download Full-text

Nitrogen/sulfur dual-doped reduced graphene oxide supported CuFeS2 as an efficient electrocatalyst for the oxygen reduction reaction

New Journal of Chemistry ◽

10.1039/c7nj03204h ◽

2018 ◽

Vol 42 (3) ◽

pp. 2081-2088 ◽

Cited By ~ 5

Author(s):

Man Zhang ◽

Wei Hong ◽

Ruinan Xue ◽

Lingzhi Li ◽

Guanbo Huang ◽

...

Keyword(s):

Graphene Oxide ◽

Fuel Cells ◽

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Reduced Graphene Oxide ◽

Low Cost ◽

Reduction Reaction ◽

Reduced Graphene

At present, low-cost and efficient electrocatalysts for accelerating the oxygen reduction reaction in fuel cells are highly desired.

Download Full-text

Theoretical Modelling and Facile Synthesis of a Highly Active Boron-Doped Palladium Catalyst for the Oxygen Reduction Reaction

Angewandte Chemie International Edition ◽

10.1002/anie.201601727 ◽

2016 ◽

Vol 55 (24) ◽

pp. 6842-6847 ◽

Cited By ~ 43

Author(s):

Tat Thang Vo Doan ◽

Jingbo Wang ◽

Kee Chun Poon ◽

Desmond C. L. Tan ◽

Bahareh Khezri ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Palladium Catalyst ◽

Reduction Reaction ◽

Theoretical Modelling ◽

Facile Synthesis ◽

Highly Active ◽

Boron Doped

Download Full-text

Tunable mesoporous manganese oxide for high performance oxygen reduction and evolution reactions

Journal of Materials Chemistry A ◽

10.1039/c5ta07878d ◽

2016 ◽

Vol 4 (2) ◽

pp. 620-631 ◽

Cited By ~ 70

Author(s):

Islam M. Mosa ◽

Sourav Biswas ◽

Abdelhamid M. El-Sawy ◽

Venkatesh Botu ◽

Curtis Guild ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Manganese Oxide ◽

Oxygen Reduction ◽

Oxygen Evolution ◽

Oxygen Evolution Reaction ◽

High Performance ◽

Reduction Reaction ◽

Noble Metal Catalysts ◽

Highly Active ◽

State Of Art

Understanding the origin of manganese oxide activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is a key step towards rationally designing of highly active catalysts capable of competing with the widely used, state-of-art noble metal catalysts.

Download Full-text

Highly efficient electrocatalysts with CoO/CoFe2O4 composites embedded within N-doped porous carbon materials prepared by hard-template method for oxygen reduction reaction

RSC Advances ◽

10.1039/c7ra09517a ◽

2017 ◽

Vol 7 (89) ◽

pp. 56375-56381 ◽

Cited By ~ 6

Author(s):

Xinxin Jin ◽

Yu Jiang ◽

Qi Hu ◽

Shaohua Zhang ◽

Qike Jiang ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Alkaline Solution ◽

Porous Carbon ◽

Carbon Materials ◽

Low Cost ◽

Reduction Reaction ◽

Template Method ◽

Hard Template ◽

Hard Template Method

Low-cost dual transition metal (Fe and Co) based non-noble metal electrocatalysts (NNMEs) with large surface area and porous structure boost oxygen reduction reaction (ORR) performance in alkaline solution.

Download Full-text