Nanoporous gold supported chromium-doped NiFe oxyhydroxides as high-performance catalysts for the oxygen evolution reaction

Sun, Jie-Song; Zhou, Yitong; Yao, Ruiqi; Shi, Hang; Wen, Zi; Lang, Xing‐You; Jiang, Qing

doi:10.1039/c9ta01027k

Cited by 39 publications

(25 citation statements)

References 51 publications

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“…Second, Cr, the oxide form of which is known as one of the inactive transition-metal oxides for the OER, can be effective in addition to Fe, if the total composition of catalysts is optimized so that the high electrical conduction of charge is attained during the OER (note that the experimentally obtained bandgaps of pristine LaCrO 3 and LaFeO 3 are very large,~3.4 eV and~2.3 eV, respectively) 53,54 . Indeed, recent reports dealing with Cr doping and solid solutions in various materials to enhance the OER catalysis [55][56][57][58] agree very well with our observations and DFT calculation for the Cr 3d DOS. Third, from the Al doping results in Figs.…”

Section: Discussionsupporting

confidence: 90%

Elucidating intrinsic contribution of d-orbital states to oxygen evolution electrocatalysis in oxides

et al. 2021

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Although numerous studies on oxide catalysts for an efficient oxygen evolution reaction have been carried out to compare their catalytic performance and suggest new compositions, two significant constraints have been overlooked. One is the difference in electronic conduction behavior between catalysts (metallic versus insulating) and the other is the strong crystallographic surface orientation dependence of the catalysis in a crystal. Consequently, unless a comprehensive comparison of the oxygen-evolution catalytic activity between samples is made on a crystallographically identical surface with sufficient electron conduction, misleading interpretations on the catalytic performance and mechanism may be unavoidable. To overcome these limitations, we utilize both metallic (001) LaNiO3 epitaxial thin films together with metal dopants and semiconducting (001) LaCoO3 epitaxial thin films supported with a conductive interlayer. We identify that Fe, Cr, and Al are beneficial to enhance the catalysis in LaNiO3 although their perovskite counterparts, LaFeO3, LaCrO3, and LaAlO3, with a large bandgap are inactive. Furthermore, semiconducting LaCoO3 is found to have more than one order higher activity than metallic LaNiO3, in contrast to previous reports. Showing the importance of facilitating electron conduction, our work highlights the impact of the near-Fermi-level d-orbital states on the oxygen-evolution catalysis performance in perovskite oxides.

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Section: Discussionsupporting

confidence: 90%

Elucidating intrinsic contribution of d-orbital states to oxygen evolution electrocatalysis in oxides

et al. 2021

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“…Furthermore, the NPG/Cr-NiFe electrodes exhibited high and stable OER activity in 0.1 M KOH solution, with an ultralow Tafel slope of %33 mV dec À1 (Figure 16E) and an overpotential of 323 mV at 10 mA cm À2 (Figure 17D). [59] It is also important to mention that, in addition to the presence of the conductive NPG substrate, doping with a third metal has been an excellent strategy to improve the electrocatalytic properties of lamellar hydroxides, as previously reported in the work of Gonçalves and collaborators. [60] Yao and collaborators [61] described a highly efficient electrocatalyst based on self-supported monolithic hybrid electrodes of bimetallic cobalt-molybdenum nitride nanosheets vertically aligned on 3D and bicontinuous nanoporous gold (NPG/ CoMoN x , Figure 18B) to boost the sluggish reaction kinetics of water oxidation in alkaline media.…”

Section: Npg Materials For Oermentioning

confidence: 77%

“…For example, Sun et al [ 59 ] reported the preparation of monolithic hybrid electrodes of chromium‐doped NiFe oxyhydroxide nanosheets via an electrodeposition method. The nanosheets are quasi‐vertically oriented along with the 3D nanoporous gold (NPG/Cr–NiFe oxyhydroxide, Figure 17 A), and were found to present high performance as OER electrocatalysts in alkaline media.…”

Section: Npg Materials In Water Splittingmentioning

confidence: 99%

Nanoporous Gold‐Based Materials for Electrochemical Energy Storage and Conversion

et al. 2021

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Herein, the promising world of nanoporous gold (NPG) as an electrode material for energy storage and conversion is reviewed. NPG has excellent conductivity and a porous structure, providing a huge active surface area for deposition of transition metal atoms and electrochemically active materials. Moreover, NPG materials display high intrinsic activity because of their crystallographic structural defects to catalyze hosts of electrochemical reactions, considered pertinent in clean energy technologies. Therefore, taking into account their superior specific and mass activity, they provide a versatile platform for developing high‐performance catalysts for oxidation and reduction reactions, supercapacitors, and battery‐type electrode materials for the assembly of high density electric energy storage devices. Initially, a full overview of the strategies used to build NPG structures and incorporate other metallic elements in the pore walls is presented. Afterward, the water‐splitting parameters and performance of NPG catalysts for hydrogen generation are reviewed. Next, the possibility of using such porous materials as fuel cell electrodes is discussed. In short, the most recent advancements in the field paving the way for the preparation of advanced electrode materials meeting the most stringent requirements are reviewed, demonstrating the bright perspectives for innovation in the key area of energy conversion and storage.

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“…With the aim of improving the OER performance, other heteroatoms have been doped into NiFe‐based (oxy)hydroxides. [ 60 ] For example, Cho and co‐workers observed that residual surface S dramatically affected the OER performance of the NiFe (oxy)hydroxide catalyst. [ 61 ] The Fe K‐edge XANES and EXAFS spectra showed that the residual S may lead to the increased Fe−O bond length due to S being less electronegative than O.…”

Section: Advanced Nife‐based Electrocatalystsmentioning

confidence: 99%

“…In addition to main group elements, other 3d transition metals have also been imported into the NiFe (oxy)hydroxide structure. Jiang and co‐workers prepared chromium‐doped NiFe oxyhydroxide nanosheets, [ 60 ] The incorporated chromium ions modified the local electronic structures near the electroactive Fe sites in the NiFe oxyhydroxide sheets, leading to an intrinsic activity and a high turnover frequency. In addition, Kang and co‐workers found that NiFeMo electrocatalysts grown on a 3D conductive and porous electrode in the absence of a binder displayed an ultrahigh performance toward the OER.…”

Section: Advanced Nife‐based Electrocatalystsmentioning

confidence: 99%

Recent Progress on NiFe‐Based Electrocatalysts for the Oxygen Evolution Reaction

Zhao

Zhang

et al. 2020

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are required. [2a,b,3] Among the various sustainable energy candidates, hydrogen fuel has garnered significant attention owing to its natural advantages. Hydrogen is typically a nontoxic and environmentally friendly power source that can be produced from water, which is an earth-abundant reactant, and produces no CO 2 emissions when converted into other energy forms. [4-6] In addition, due to its high mass-specific energy density, hydrogen can be efficiently used in mobile applications. Moreover, hydrogen can be used in combustion engines and fuel cells. Hence, the development of efficient hydrogen-based energy systems is necessary. [7-9] Producing hydrogen by electrolytic water splitting is considered a promising approach to resolve the current environmental crisis and has been extensively investigated with emphasis on availability and sustainability. [10,11] During water electrolysis, the cathodic hydrogen evolution reaction (HER) [12] and the anodic oxygen evolution reaction (OER) occur simultaneously, as exemplified by the following equations

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Nanoporous gold supported chromium-doped NiFe oxyhydroxides as high-performance catalysts for the oxygen evolution reaction

Abstract: Chromium-doped NiFe oxyhydroxide nanosheets that are quasi-vertically oriented on three-dimensional nanoporous gold exhibit superior catalytic activity towards the oxygen evolution reaction.

Cited by 39 publications

References 51 publications

Elucidating intrinsic contribution of d-orbital states to oxygen evolution electrocatalysis in oxides

Elucidating intrinsic contribution of d-orbital states to oxygen evolution electrocatalysis in oxides

Nanoporous Gold‐Based Materials for Electrochemical Energy Storage and Conversion

Recent Progress on NiFe‐Based Electrocatalysts for the Oxygen Evolution Reaction

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