Mesoporous Ag-doped Co3O4 nanowire arrays supported on FTO as efficient electrocatalysts for oxygen evolution reaction in acidic media

Yan, Kai-Li; Chi, Jing‐Qi; Xie, Jing-Yi; Dong, Bin; Liu, Zi-Zhang; Gao, Wen-Kun; Lin, Jai-Ming; Chai, Yong‐Ming; Liu, Chenguang

doi:10.1016/j.renene.2017.12.003

Cited by 144 publications

(63 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By introducing the “self‐repair” mechanism, this kind of structure could even work at 80 °C and 500 mA cm −2 with overpotentials below 0.7 V. [ 182 ] Ag doped Co 3 O 4 prepares by the annealing of Co 3 O 4 nanowire on Ag film also enhanced OER performance compared to pristine Co 3 O 4 . [ 48 ] The high conductivity and stability of Ag in H 2 SO 4 would improve the OER performance of the catalyst in acid, thus resulting in an overpotential of 670 mV at 10 mA cm −2 and a nearly constant current response at an overpotential of 370 mV for 10 h. Recently, Co‐containing polyoxometalates (Co‐POMs) are investigated as a promising catalyst for acidic water oxidation. [ 167 ] The insoluble barium salt of a cobalt‐phosphotungstate polyanion (Ba‐[Co‐POM]) catalyst is better than the IrO 2 catalyst in 0.5 m H 2 SO 4 with an overpotential of 189 mV at 1 mA cm −2 ( Figure 11 ), which offers a promising way to design precious‐metal free OER catalysts with superior activity and enhanced stability in acid.…”

Section: Nonprecious Metal‐based Oer Catalystsmentioning

confidence: 99%

“…From 1970s, the electrocatalysts in acidic environment are mainly thin films based on metal oxides, such as MoO 2 , WO 2 , ReO 2 , OsO 2 , RuO 2 , and IrO 2 . [ 36–38 ] At present, the catalytic performance and stability of catalysts in acid have made great progress, including precious metal, [ 39–42 ] oxides, [ 43,44 ] perovskite, [ 45–47 ] nonprecious metal, [ 27,48 ] and metal‐free compounds. [ 49 ]…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Lei

Wang

Zhao

et al. 2020

Advanced Energy Materials

224

161

View full text Add to dashboard Cite

Hydrogen is a clean and renewable energy carrier for powering future transportation and other applications. Water electrolysis is a promising option for hydrogen production from renewable resources such as wind and solar energy. To date, tremendous efforts have been devoted to the development of electrocatalysts and membranes for water electrolysis technology. In principle, water electrolysis in acidic media has several advantages over that in alkaline media, including favorable reaction kinetics, easy product separation, and low operating pressure. However, acidic water electrolysis poses higher requirements for the catalysts, especially the ones for the oxygen evolution reaction. It is a grand challenge to develop highly active, durable, and cost‐effective catalysts to replace precious metal catalysts for acidic water oxidation. In this article, an overview is presented of the latest developments in design and synthesis of electrocatalysts for acidic water oxidation, emphasizing new strategies for achieving high electrocatalytic activity while maintaining excellent durability at low cost. In particular, the reaction pathways and intermediates are discussed in detail to gain deeper insight into the oxygen evolution reaction mechanism, which is vital to rational design of more efficient electrocatalysts. Further, the remaining scientific challenges and possible strategies to overcome them are outlined, together with perspectives for future‐generation electrocatalysts that exploit nanoscale materials for water electrolysis.

show abstract

Section: Nonprecious Metal‐based Oer Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Lei

Wang

Zhao

et al. 2020

Advanced Energy Materials

224

161

View full text Add to dashboard Cite

show abstract

“…Water electrolysis to generate hydrogen has received much attention recently . Electrochemical water splitting undergoes an oxygen evolution reaction (OER) at the anode and a hydrogen evolution reaction (HER) at the cathode . Highly active catalysts are regularly demanded to lower the overpotentials and accelerate the reaction rates at the electrode/electrolyte interface .…”

Section: Introductionmentioning

confidence: 99%

Ru@RuO₂ Core‐Shell Nanorods: A Highly Active and Stable Bifunctional Catalyst for Oxygen Evolution and Hydrogen Evolution Reactions

Jiang

Tran

et al. 2019

Energy & Environ Materials

View full text Add to dashboard Cite

Ru@RuO2 core‐shell nanorods were successfully synthesized by heat‐treating Ru nanorods with air oxidation through an accurate control of the temperature and time. The structure, composition, dimension, and adsorption property of the core‐shell nanorods were well characterized with XRD and TEM. The catalytic activity and stability were electrochemically evaluated with a rotating disk electrode, a rotating ring‐disk electrode, and chronopotentiometric methods. The Ru@RuO2 nanorods reveal excellent bifunctional catalytic activity and robust stability for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The overpotentials for OER and HER are 320 mV and 137 mV at the current density of 10 mA cm−2, respectively. The catalytic activity of Ru@RuO2 nanorods for OER is 6.5 times higher than that of the state‐of‐the‐art catalyst IrO2 according to the catalytic current density measured at 1.60 V (versus RHE). The catalytic activity of Ru@RuO2 nanorods for HER is comparable to 40% Pt/C by comparing the catalytic current densities at −0.2 V.

show abstract

“…The overpotential for 10 mA/cm 2 was 570 mV vs. RHE in 0.5 M H 2 SO 4 , and the catalyst maintained an OER with near-quantitative Faradaic yield for over 12 h. Unfortunately, the dissolution rate of Co at this high current density was considerable and further studies are needed for corrosion protection of such structures. To this end, Yan et al have recently reported the synthesis of mesoporous Ag-doped Co 3 O 4 nanowires, which showed improved stability over 10 h operation at 1.6 V vs. RHE in 0.5 M H 2 SO 4 , as Ag is known to be stable in acidic media [210]. The Ag-doped Co 3 O 4 nanowires were synthesized by electrodeposition-hydrothermal process, which was followed by calcination at 400 • C. The nanostructured catalysts showed a Tafel slope of 219 mV/decade and an overpotential of approx.…”

Section: Earth-abundant Anode Materialsmentioning

confidence: 99%

Earth-Abundant Electrocatalysts in Proton Exchange Membrane Electrolyzers

Sun

Fleischer

et al. 2018

Catalysts

View full text Add to dashboard Cite

In order to adopt water electrolyzers as a main hydrogen production system, it is critical to develop inexpensive and earth-abundant catalysts. Currently, both half-reactions in water splitting depend heavily on noble metal catalysts. This review discusses the proton exchange membrane (PEM) water electrolysis (WE) and the progress in replacing the noble-metal catalysts with earth-abundant ones. The efforts within this field for the discovery of efficient and stable earth-abundant catalysts (EACs) have increased exponentially the last few years. The development of EACs for the oxygen evolution reaction (OER) in acidic media is particularly important, as the only stable and efficient catalysts until now are noble-metal oxides, such as IrOx and RuOx. On the hydrogen evolution reaction (HER) side, there is significant progress on EACs under acidic conditions, but there are very few reports of these EACs employed in full PEM WE cells. These two main issues are reviewed, and we conclude with prospects for innovation in EACs for the OER in acidic environments, as well as with a critical assessment of the few full PEM WE cells assembled with EACs.

show abstract

Mesoporous Ag-doped Co3O4 nanowire arrays supported on FTO as efficient electrocatalysts for oxygen evolution reaction in acidic media

Cited by 144 publications

References 44 publications

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Ru@RuO₂ Core‐Shell Nanorods: A Highly Active and Stable Bifunctional Catalyst for Oxygen Evolution and Hydrogen Evolution Reactions

Earth-Abundant Electrocatalysts in Proton Exchange Membrane Electrolyzers

Contact Info

Product

Resources

About

Mesoporous Ag-doped Co3O4 nanowire arrays supported on FTO as efficient electrocatalysts for oxygen evolution reaction in acidic media

Cited by 144 publications

References 44 publications

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Ru@RuO2 Core‐Shell Nanorods: A Highly Active and Stable Bifunctional Catalyst for Oxygen Evolution and Hydrogen Evolution Reactions

Earth-Abundant Electrocatalysts in Proton Exchange Membrane Electrolyzers

Contact Info

Product

Resources

About

Ru@RuO₂ Core‐Shell Nanorods: A Highly Active and Stable Bifunctional Catalyst for Oxygen Evolution and Hydrogen Evolution Reactions