Electrocatalytic performance of different cobalt molybdate structures for water oxidation in alkaline media

Rodríguez, Mariandry; Stolzemburg, Matheus C. P.; Bruziquesi, Carlos Giovani Oliveira; Silva, Adilson C.; Abreu, Cíntia Grossi de; Siqueira, Kisla Prislen Félix; Oliveira, Luiz C.A.; Pires, Marcus Sandes; Lacerda, Lívia C. T.; Ramalho, Teodorico C.; Dias, Anderson; Pereira, Márcio C.

doi:10.1039/c8ce01073k

Cited by 34 publications

(21 citation statements)

References 58 publications

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“…The hcp/NN-NiFe exhibits 17 folds higher OER current density than its fcc/N counterpart at an overpotential of 250 mV. Similar improvement in performance of NNPs is observed for CoOOH and CoMoO 4 (Rodriguez et al, 2018).…”

Section: Oxygen Electrochemistry and Non-native Polymorphsupporting

confidence: 61%

“…The change in adsorption energies for O‐intermediates can be achieved through the distortion of MO bonds via stabilization of NNPs, which changes shape and position of t 2g ‐ and e g ‐bands. Though there are many reports of better performance of OER and ORR by using NNPs (Gardner et al, 2016; Huynh, Shi, Billinge, & Nocera, 2015; Liu et al, 2015; Maiyalagan, Jarvis, Therese, Ferreira, & Manthiram, 2014; Rodriguez et al, 2018; Z.‐P. Wu et al, 2018; Z. Xu & Kitchin, 2015), minimal organized data for comparing specific activity and apparent activity has left us with a relatively smaller number of reports for unraveling the reason behind properties of NNPs.…”

Section: Electrocatalytic and Photo‐electrocatalytic Reaction And Nonmentioning

confidence: 99%

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Stabilization of non‐native polymorphs for electrocatalysis and energy storage systems

Saha

Gupta

Pala

2020

WIREs Energy & Environment

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Evolution in material centric devices like batteries and electrocatalytic reactors have predominantly been made possible via the exploitation of the thermodynamic ground state of pristine or defective bulk crystal, referred to as the “Native polymorph” (NP) here. A significant increase in the material search space is possible by utilizing “Non‐Native polymorphs (NNP),” which are materials that have different translational symmetry with respect to NP. As the NNP have a distinct coordination structure from that of the NP, critical material properties can be anticipated to be different, making NNP a potential substitute material for the aforementioned applications, which are the focus of this review. To obtain a structure–function relationship, systematic approaches to the synthesis of NNP has been demonstrated. Following certain generalities behind NNP, we classify synthesis techniques into few categories with the hope of rationalizing the underlying mechanism of these synthesis and stabilization strategies. We discuss the utility of NNPs in the context of electrochemical water electrocatalytic reactions. Typically, the NNPs have more open volume space enabling lower lithium‐ion diffusion barrier, higher lithium‐ion binding energies, thereby making NNP efficient in the context of energy storage material. However, NNP have lesser stability than the NP and methods to calibrate and improve the stability of NNP are important. Overall, the discussion of polymorphic materials by demarcating them as NP and NNP provides a systematic approach towards modulating material properties as a trade‐off between thermodynamics and kinetics of physicochemical processes. Finally, the challenges and perspectives in this emerging field are discussed. This article is categorized under: Fuel Cells and Hydrogen > Science and Materials Energy Research & Innovation > Science and Materials Energy and Development > Science and Materials

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Section: Oxygen Electrochemistry and Non-native Polymorphsupporting

confidence: 61%

Section: Electrocatalytic and Photo‐electrocatalytic Reaction And Nonmentioning

confidence: 99%

Stabilization of non‐native polymorphs for electrocatalysis and energy storage systems

Saha

Gupta

Pala

2020

WIREs Energy & Environment

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“…In the second step, the as‐obtained CoMoO 4 •xH 2 O/NF was further annealed in a tube furnace at 500 °C for 2 h to transform into CoMoO 4 /NF via dehydration. [ 31 ] The morphology of the CoMoO 4 /NF catalyst was characterized by scanning electron microscopy (SEM) imaging. As shown in Figure 2b, the CoMoO 4 nanorods are grown uniformly on the mesoporous NF substrate; the CoMoO 4 nanorods are several micrometers in length, see Figure 2c.…”

Section: Resultsmentioning

confidence: 99%

“…A high‐resolution TEM (HRTEM) image of an individual nanorod displayed well‐defined lattice fringes with a d‐spacing of 0.39 nm, which corresponds to the (021) facet of CoMoO 4 , indicating that the growth direction of the nanorod is perpendicular to (021), see Figure 2e. In order to characterize the crystal structure of the CoMoO 4 nanorods, powder X‐ray diffraction (PXRD) was employed, which displayed well‐defined diffraction peaks fitting well with monoclinic CoMoO 4 (β‐CoMoO 4 , JCPDS 00‐021‐0868), [ 31,32 ] see Figure 2f. A minor impurity appeared at 2θ = 14.2 o , which can be ascribed to the (110) facet of α‐CoMoO 4 (JCPDS 04‐008‐9475).…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Evolution Linked to Selective Oxidation of Glycerol over CoMoO₄—A Theoretically Predicted Catalyst

Araujo

Qiu

et al. 2022

Advanced Energy Materials

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Electrochemical valorization of biomass waste (e.g., glycerol) for production of value‐added products (such as formic acid) in parallel with hydrogen production holds great potential for developing renewable and clean energy sources. Here, a synergistic effort between theoretical calculations at the atomic level and experiments to predict and validate a promising oxide catalyst for the glycerol oxidation reaction (GOR) are reported, providing a good example of designing novel, cost‐effective, and highly efficient electrocatalysts for producing value‐added products at the anode and high‐purity hydrogen at the cathode. The predicted CoMoO4 catalyst is experimentally validated as a suitable catalyst for GOR and found to perform best among the investigated metal (Mn, Co, Ni) molybdate counterparts. The potential required to reach 10 mA cm−2 is 1.105 V at 60 °C in an electrolyte of 1.0 m KOH with 0.1 m glycerol, which is 314 mV lower than for oxygen evolution. The GOR reaction pathway and mechanism based on this CoMoO4 catalyst are revealed by high‐performance liquid chromatography and in situ Raman analysis. The coupled quantitative analysis indicates that the CoMoO4 catalyst is highly active toward CC cleavage, thus presenting a high selectivity (92%) and Faradaic efficiency (90%) for formate production.

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“…Those located at 892 and 834 cm −1 correspond to the anti-symmetric stretching ʋ3 (Bg/D 2 h) and ʋ3 (Eg) vibration modes of the Mo-O-Mo of German entartet (e.g. ), respectively [21]; the band observed at 711 cm −1 corresponds to the antisymmetric stretching modes of oxygen in the O-Mo-O band [27]; The peaks at 360 and 330 cm -1 correspond to the anti-symmetric ʋ 4 (Bg/D 2 h) and ʋ 2 (Ag/C 2 h) bending modes, respectively [28][29][30][31]. Thus, the free rotation mode was observed at 276 cm −1 [32].…”

Section: Raman Spectroscopymentioning

confidence: 99%

Structural, morphological and optical properties of cobalt-substituted MgMoO4 ceramics prepared by pyrolysis of citric acid precursors

Lakhlifi

Jabbar

Ouatib

et al. 2020

Surfaces and Interfaces

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Magnesium-cobalt molybdate composites (Mg 1-x Co x MoO 4 : x = 0, 0.3, 0.4, 0.6, 0.8 and 1) were successfully synthesized through a facile sol-gel synthesis at low temperature, and characterized by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), UV-Vis spectroscopy and colorimetric measurements using the CIE L*a*b* colour system. The surface specific area was calculated using the Brunauer-Emmett-Teller analysis in the adsorption/desorption isotherm. The examination of the X-ray diffractograms of the unground milled solid solutions of Mg 1-x Co x MoO 4 (0 ≤ x ≤ 1) presented a single continuous system related to monoclinic β-MgMoO 4 . The absorbance spectra of the Mg 1-x Co x MoO 4 pigments confirmed the insertion of cobalt in the β-MgMoO 4 matrix. The CIE-L*a*b* colour coordinates indicated that the intense purple colour was obtained for x = 0.6.

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Electrocatalytic performance of different cobalt molybdate structures for water oxidation in alkaline media

Abstract: Among the CoMoO4 polymorphs, the α-phase exhibits the highest performance for the oxygen evolution reaction.

Cited by 34 publications

References 58 publications

Stabilization of non‐native polymorphs for electrocatalysis and energy storage systems

Stabilization of non‐native polymorphs for electrocatalysis and energy storage systems

Hydrogen Evolution Linked to Selective Oxidation of Glycerol over CoMoO₄—A Theoretically Predicted Catalyst

Structural, morphological and optical properties of cobalt-substituted MgMoO4 ceramics prepared by pyrolysis of citric acid precursors

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Electrocatalytic performance of different cobalt molybdate structures for water oxidation in alkaline media

Abstract: Among the CoMoO4 polymorphs, the α-phase exhibits the highest performance for the oxygen evolution reaction.

Cited by 34 publications

References 58 publications

Stabilization of non‐native polymorphs for electrocatalysis and energy storage systems

Stabilization of non‐native polymorphs for electrocatalysis and energy storage systems

Hydrogen Evolution Linked to Selective Oxidation of Glycerol over CoMoO4—A Theoretically Predicted Catalyst

Structural, morphological and optical properties of cobalt-substituted MgMoO4 ceramics prepared by pyrolysis of citric acid precursors

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Product

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Hydrogen Evolution Linked to Selective Oxidation of Glycerol over CoMoO₄—A Theoretically Predicted Catalyst