Cu2O nano-flowers/graphene enabled scaffolding structure catalyst layer for enhanced CO2 electrochemical reduction

Wang, Yucheng; Lei, Hanhui; Lu, Shun; Yang, Ziming; Xu, Ben Bin; Lü, Xing; Liu, Xiaoteng

doi:10.1016/j.apcatb.2021.121022

Cited by 39 publications

(27 citation statements)

References 42 publications

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“…The developing demand for clean energy resources and attention to environmental pollution triggered by fossil fuels are inspiring a strong research interest in energy storage and conversion from environment-friendly renewable energy. , The oxygen evolution reaction (OER), as an important chemical form process to produce and store renewable energy, has led to many types of research in the past decade years. − However, the anodic OER kinetics is sluggish and still possesses a critical bottleneck to improve the water-splitting effectiveness due to the four-electron transfer process for O–H bond breaking and O–O bond formation. , Therefore, an effective electrocatalyst is required to drive a higher current density at a lower overpotential and thus enhance the energy conversion efficiency. , As we know, metal oxides are always the efficient active and durable electrocatalysts for OER. In particular, RuO 2 and IrO 2 among metal oxides are considered to be the best OER electrocatalysts in both alkaline and acidic solutions; nevertheless, the price and scarcity restrained these noble oxides’ large-scale practical applications.…”

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Hierarchical Nanostructured Metal Ferrite Microspheres for Enhanced Electrocatalytic Oxygen Evolution Reaction

Dai

et al. 2023

ACS Appl. Nano Mater.

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Ferrite MFe2O4 (M = Ni, Co, etc.) metal oxides have been the focus of intense research, studied as promising electrocatalysts due to their good catalytic activity and stability for oxygen evolution reaction (OER). Structure engineering is a significant solution to achieve a high catalytic performance; further, optimizing the structure and specific surface area (SSA) of metal ferrite (CoFe2O4 and NiFe2O4) is regarded as a good choice. Herein, we designed hierarchical porous nanostructured CoFe2O4 and NiFe2O4 microspheres with the assistance of sodium dodecyl sulfonate by solvothermal and annealing methods. We found that three-dimensional microspheres assembled by nanoparticles and porous nanosheets exhibit higher SSAs for NiFe2O4 (158.47 m2 g–1) and CoFe2O4 (144.52 m2 g–1). Their higher SSA is much higher than those of other CoFe2O4-based and NiFe2O4-based materials. The as-prepared metal ferrite microspheres exhibit excellent OER electrocatalytic activity with lower Tafel slopes (55.2 and 58.2 mV dec–1) and lower overpotentials (235 and 280 mV) at a constant current density of 10 mA cm–2 and long-term stability, which is better than that of NiFe2O4 and CoFe2O4 bulks. This method for preparing a large SSA is expected to be applied in other spinel metal oxides.

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Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Hierarchical Nanostructured Metal Ferrite Microspheres for Enhanced Electrocatalytic Oxygen Evolution Reaction

Dai

et al. 2023

ACS Appl. Nano Mater.

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“…[6]. Cu and Cu-derived materials have been considered the most common electrocatalysts for the CO 2 RR in the early stages [7,8]. Furthermore, Ag-based [9,10] and Au-based [11][12][13] catalysts can selectively reduce CO 2 to CO at low overpotentials.…”

Section: Introductionmentioning

confidence: 99%

DFT Study on the CO2 Reduction to C2 Chemicals Catalyzed by Fe and Co Clusters Supported on N-Doped Carbon

Xue

Yang

et al. 2022

Nanomaterials

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The catalytic conversion of CO2 to C2 products through the CO2 reduction reaction (CO2RR) offers the possibility of preparing carbon-based fuels and valuable chemicals in a sustainable way. Herein, various Fen and Co5 clusters are designed to screen out the good catalysts with reasonable stability, as well as high activity and selectivity for either C2H4 or CH3CH2OH generation through density functional theory (DFT) calculations. The binding energy and cohesive energy calculations show that both Fe5 and Co5 clusters can adsorb stably on the N-doped carbon (NC) with one metal atom anchored at the center of the defected hole via a classical MN4 structure. The proposed reaction pathway demonstrates that the Fe5-NC cluster has better activity than Co5-NC, since the carbon–carbon coupling reaction is the potential determining step (PDS), and the free energy change is 0.22 eV lower in the Fe5-NC cluster than that in Co5-NC. However, Co5-NC shows a better selectivity towards C2H4 since the hydrogenation of CH2CHO to CH3CHO becomes the PDS, and the free energy change is 1.08 eV, which is 0.07 eV higher than that in the C-C coupling step. The larger discrepancy of d band center and density of states (DOS) between the topmost Fe and sub-layer Fe may account for the lower free energy change in the C-C coupling reaction. Our theoretical insights propose an explicit indication for designing new catalysts based on the transition metal (TM) clusters supported on N-doped carbon for multi-hydrocarbon synthesis through systematically analyzing the stability of the metal clusters, the electronic structure of the critical intermediates and the energy profiles during the CO2RR.

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“…[ 4,5 ] However, the Pt‐based catalyst possess disadvantages as high cost, scarcity, low stability, and poor methanol tolerance, which seriously hinder their application. [ 6 ] Motivated by the above, considerable efforts have been paid for exploring inexpensive and highly efficient nonprecious metal catalysts (NPMC) to take the place of the Pt‐based catalyst for the ORR. [ 7–11 ]…”

Section: Introductionmentioning

confidence: 99%

“…[4,5] However, the Pt-based catalyst possess disadvantages as high cost, scarcity, low stability, and poor methanol tolerance, which seriously hinder their application. [6] Motivated by the above, considerable efforts have been paid for exploring inexpensive and highly efficient nonprecious metal catalysts (NPMC) to take the place of the Pt-based catalyst for the ORR. [7][8][9][10][11] Pyrolyzed iron-and nitrogen-doped (Fe-N-C) materials are a group of NPMC with huge potential to replace the Pt-based catalyst for their maximum metal atom utilization and high exposure of active sites, which could yield favorable ORR performance.…”

mentioning

confidence: 99%

Polyhedral Carbon Anchored on Carbon Nanosheet with Abundant Atomic Fe‐N_x Moieties for Oxygen Reduction

Liu

Huyan

Zhao

et al. 2022

Adv Materials Inter

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efficient candidates for accelerating the ORR. [4,5] However, the Pt-based catalyst possess disadvantages as high cost, scarcity, low stability, and poor methanol tolerance, which seriously hinder their application. [6] Motivated by the above, considerable efforts have been paid for exploring inexpensive and highly efficient nonprecious metal catalysts (NPMC) to take the place of the Pt-based catalyst for the ORR. [7][8][9][10][11] Pyrolyzed iron-and nitrogen-doped (Fe-N-C) materials are a group of NPMC with huge potential to replace the Pt-based catalyst for their maximum metal atom utilization and high exposure of active sites, which could yield favorable ORR performance. The active sites of Fe-N-C materials are made by the single iron atoms coordinated by nitrogen doping (Fe-N x moieties). Ding et al. reported an ion-imprinting derived strategy to develop carbon-based single-atom iron electrocatalysts with nitrogen coordination (CSAIN) with high concentrations of Fe-N 4 active sites, with a clear verification of the working mechanism of Fe-N 4 moieties during ORR process. [12] Whereas the synthesis of Fe-N-C materials is widely exercised by pyrolyzing the precursors containing iron, nitrogen, and carbon sources, technical challenges such as the low density of Fe-N x moieties and undesired ORR performance induced by the iron atoms agglomeration remain to be overcome. [13][14][15] Zeolitic-imidazolate type of metal-organic framework with coordination Zinc atoms (ZIF-8) has been frequently used in Carbon-based single-atom iron electrocatalysts with nitrogen coordination (CSAIN) have recently shown enormous promise to replace the costly Pt for boosting the cathodic oxygen reduction reaction (ORR) in fuel cells. However, there remains a great challenge to achieve highly efficient CSAIN catalysts for the ORR in acidic electrolytes. Herein, a novel CSAIN catalyst is synthesized by pyrolyzing a precursor mixture consisting of metal-organic framework and conductive polymer hybrid. After pyrolysis at a high temperature, the CSAIN with a structure of carbon nanosheet supported polyhedral carbon is achieved, where the unique structure endows CSAIN with expediting electron transfer and mass transport, as well as largely exposed surface to host atomically dispersed iron active sites. As a result, the optimal CSAIN catalyst shows a high ORR activity with its half-wave potential of 0.77 V (vs RHE) and a Tafel slope of 74.1 mV dec -1 , which are comparable to that of commercial Pt/C catalyst (0.80 V and 81.9 mV dec -1 ).

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Cu2O nano-flowers/graphene enabled scaffolding structure catalyst layer for enhanced CO2 electrochemical reduction

Cited by 39 publications

References 42 publications

Controlled Synthesis of Hierarchical Nanostructured Metal Ferrite Microspheres for Enhanced Electrocatalytic Oxygen Evolution Reaction

Controlled Synthesis of Hierarchical Nanostructured Metal Ferrite Microspheres for Enhanced Electrocatalytic Oxygen Evolution Reaction

DFT Study on the CO2 Reduction to C2 Chemicals Catalyzed by Fe and Co Clusters Supported on N-Doped Carbon

Polyhedral Carbon Anchored on Carbon Nanosheet with Abundant Atomic Fe‐N_x Moieties for Oxygen Reduction

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Cu2O nano-flowers/graphene enabled scaffolding structure catalyst layer for enhanced CO2 electrochemical reduction

Cited by 39 publications

References 42 publications

Controlled Synthesis of Hierarchical Nanostructured Metal Ferrite Microspheres for Enhanced Electrocatalytic Oxygen Evolution Reaction

Controlled Synthesis of Hierarchical Nanostructured Metal Ferrite Microspheres for Enhanced Electrocatalytic Oxygen Evolution Reaction

DFT Study on the CO2 Reduction to C2 Chemicals Catalyzed by Fe and Co Clusters Supported on N-Doped Carbon

Polyhedral Carbon Anchored on Carbon Nanosheet with Abundant Atomic Fe‐Nx Moieties for Oxygen Reduction

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Product

Resources

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Polyhedral Carbon Anchored on Carbon Nanosheet with Abundant Atomic Fe‐N_x Moieties for Oxygen Reduction