Activation of nickel foam through in-liquid plasma-induced phosphorus incorporation for efficient quasi-industrial water oxidation and selective oxygenation of organics

Yang, Hongyuan; Menezes, Pramod V.; Dai, Guoliang; Vijaykumar, Gonela; Chen, Ziliang; Al-Shakran, Mohammad; Jacob, Timo; Drieß, Matthias; Menezes, Prashanth W.

doi:10.1016/j.apcatb.2022.122249

Cited by 19 publications

(18 citation statements)

References 72 publications

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“…Remarkably, the O V -np-Cu 10 Co 20 (Mn)∥Pt/C electrolyzer demands a cell voltage of 1.0 V to drive the overall water splitting and 1.71 V to deliver 500 mA cm –2 (Figure h), which are smaller than some other reported catalysts for alkaline water electrolysis (AWE) (Table S4). − Additionally, the chronopotentiometric curves at constant current densities over 90 h are performed at the same harsh conditions (Figure i). As desired, the voltage decay rates are observed as ca.…”

Section: Resultsmentioning

confidence: 99%

Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo₂O₄ for Electrocatalytic Oxygen Generation

Wang

Zhao

et al. 2023

ACS Sustainable Chem. Eng.

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It is well known that the oxygen evolution reaction (OER) is predominant to restrict hydrogen production efficiency from water splitting. Herein, a porous spinel oxide, CuCo 2 O 4 , with abundant defects is successfully developed via a facile strategy (alloying−dealloying−annealing) as an efficient and economical electrocatalyst for OER. Profiting from the well-structured porosity, cation defects (Cu vacancies) induced by hereditary Mn doping, and anion defects (oxygen vacancies), O V -np-Cu 10 Co 20 (Mn) gives a smaller OER overpotential of 310 mV at 10 mA cm −2 and admirable long-term stability. Under the simulated industrial conditions (60 °C, 6 M KOH), this demands a cell voltage of 1.71 V to reach 500 mA cm −2 , as well as exhibits a slight attenuation of voltage after a chronopotentiometric test over 80 h. Density functional theory (DFT) calculations uncover that Mn doping could elongate the Cu−O bond, increase the electronic states near the Fermi level, and optimize the d-band center position of CuCo 2 O 4 . With the help of moderate oxygen vacancies (O V ), the energy barrier of the rate-determining step can be further reduced to 2.69 eV. This work tactfully takes advantage of the Mn element to not only construct nanoporous skeletons but also modulate electronic structures, paving an easy route to fabricate defect-enriched porous spinel oxides and accelerate the exploitation of the cost-effective OER electrocatalyst.

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Section: Resultsmentioning

confidence: 99%

Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo₂O₄ for Electrocatalytic Oxygen Generation

Wang

Zhao

et al. 2023

ACS Sustainable Chem. Eng.

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“…Spectra were recorded at three different spots on the sample surface. [ 88 ] For the quasi‐in situ characterizations, the LiFeBPO/FTO and LiFeBPO/NF electrodes after different CP runs were rapidly freeze‐quenched using liquid N 2 under vigorous Ar gas flow, and subsequently stored in liquid N 2 .…”

Section: Methodsmentioning

confidence: 99%

In Situ Reconstruction of Helical Iron Borophosphate Precatalyst toward Durable Industrial Alkaline Water Electrolysis and Selective Oxidation of Alcohols

Yang,

Vijaykumar,

Chen

et al. 2023

Adv Funct Materials

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Iron‐based (pre)catalysts have attracted enormous attention for various electrooxidation reactions due to the low cost, high abundance, and multiple accessible redox states of iron. Herein, a well‐defined helical iron borophosphate (LiFeBPO) is developed as an electro(pre)catalyst for the oxygen evolution reaction (OER) and selective alcohol oxidation. When deposited on nickel foam (NF), LiFeBPO exhibits an exceptional OER performance at ambient conditions attaining a current density of 100 mA cm−2 at ≈276 mV overpotential in 1 m KOH. Notably, this anode sustains durable alkaline water electrolysis at 500 mA cm−2 for over 330 h under industrial conditions (6 m KOH and 85 °C). In –situ and ex situ investigations reveal a deep reconstruction of LiFeBPO during OER, which transforms into a 3D open porous skeleton assembled by ultrasmall, low‐crystalline α‐FeOOH nanoparticles (interfacing with NiOOH of NF). This structure contributes to exposing accessible surface active sites, as well as accelerating mass transport and bubble detachment. Moreover, this electrode also catalyzes the electrooxidation of alcohols (methanol, ethylene glycol, and glycerol) to formic acid (FA) with high selectivity and full conversion. This study provides promising solutions for designing suitable anodes for the simultaneous production of green hydrogen fuel and value–added FA from electrooxidation reactions.

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“…[ 45 ] Some recent studies also indicated that high working temperatures, electrolyte concentrations, and electrolyte medium (saline water, buffer medium) can also trigger the reconstruction process. [ 15,65–68 ] In an alkaline medium, leaching exposes more bulk active sites, and similarly, in an acidic medium, leaching or corrosion is dominant, which leads to a more surface‐rich metal site. [ 69 ] Additionally, the working potential also has a direct impact on the degree of reconstruction, which has already been discussed in previous literature.…”

Section: Fundamentals Of Water‐splitting and The Catalyst/(pre)cataly...mentioning

confidence: 99%

New Avenues to Chemical Space for Energy Materials by the Molecular Precursor Approach

et al. 2023

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Activation of nickel foam through in-liquid plasma-induced phosphorus incorporation for efficient quasi-industrial water oxidation and selective oxygenation of organics

Cited by 19 publications

References 72 publications

Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo₂O₄ for Electrocatalytic Oxygen Generation

Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo₂O₄ for Electrocatalytic Oxygen Generation

In Situ Reconstruction of Helical Iron Borophosphate Precatalyst toward Durable Industrial Alkaline Water Electrolysis and Selective Oxidation of Alcohols

New Avenues to Chemical Space for Energy Materials by the Molecular Precursor Approach

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Activation of nickel foam through in-liquid plasma-induced phosphorus incorporation for efficient quasi-industrial water oxidation and selective oxygenation of organics

Cited by 19 publications

References 72 publications

Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo2O4 for Electrocatalytic Oxygen Generation

Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo2O4 for Electrocatalytic Oxygen Generation

In Situ Reconstruction of Helical Iron Borophosphate Precatalyst toward Durable Industrial Alkaline Water Electrolysis and Selective Oxidation of Alcohols

New Avenues to Chemical Space for Energy Materials by the Molecular Precursor Approach

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Product

Resources

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Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo₂O₄ for Electrocatalytic Oxygen Generation

Dual Promoting Effects of Hereditary Mn Doping and Oxygen Vacancies on Porous CuCo₂O₄ for Electrocatalytic Oxygen Generation