Oxygen Evolution Reaction over the Au/YSZ Interface at High Temperature

Song, Yibing; Zhao, Jijun; Dong, Qiao; Li, Yangsheng; Zhang, Xiaomin; Ta, Na; Liu, Zhi; Zhao, Jijun; Yang, Fan; Wang, Qianqian; Bao, Xinhe

doi:10.1002/anie.201814612

Cited by 37 publications

(30 citation statements)

References 37 publications

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“…Hydrogen production employing electrocatalytic water splitting has been deemed as one of the most tremendously potential routes. However, the sluggish OER occurring on the anodic electrode is a pivotal bottleneck for water splitting; although many advanced electrocatalysts have been studied, a much higher overpotential is still required for OER to coordinate with the reaction rate of hydrogen evolution reaction (HER), resulting in low efficiency of energy conversion. − Recently, a valid strategy to supersede OER with the electro-oxidation of thermodynamically more favorable substances (such as hydrazine, alcohols, and urea) is employed to promote HER. − Nevertheless, most of the anodic oxidation products are hydrophilic, resulting in both overoxidation with low selectivity and difficult scale-up synthesis, caused by occupying active sites. In addition, under some circumstances, the products are of low value. − Therefore, it is of great significance to develop advanced electrocatalysts, explore suitable anodic sacrificial agents, and produce valuable products at the anode with high selectivity, simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Double Active Sites in Co–N_x–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

Qin

Fan

et al. 2021

ACS Appl. Mater. Interfaces

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The hydrogen evolution reaction (HER) by electrocatalytic water splitting is a prospective and economical route. However, the approach is severely hindered by the sluggish anodic OER, poor reactivity of electrocatalysts, and low-value-added byproducts at the anode. Herein, formaldehyde was added as an anode sacrificial agent, and a bifunctional Co–N x –C@Co catalyst containing abundant Co–N4 sites and Co nanoparticles was successfully fabricated and evaluated as both a cathodic and an anodic material for the HER and formaldehyde selective oxidation reaction (FSOR), respectively. Co–N x –C@Co displayed a remarkable electrocatalytic performance simultaneously for both HER and FSOR with high hydrogen (H2) and carbon monoxide (CO) selectivity. Density functional theory calculations combined with experiments identified that Co–N4 and Co nanoparticles were dominating active sites for CO and H2 generation, respectively. The coupling tactic of FSOR at the anode not only expedites the reaction rate of HER but also offers a high-efficiency and energy-saving means for the generation of valuable H2/CO syngas.

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Section: Introductionmentioning

confidence: 99%

Double Active Sites in Co–N_x–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

Qin

Fan

et al. 2021

ACS Appl. Mater. Interfaces

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“…Figure 3 a shows three oxygen-containing species appear at anode surface: lattice oxygen (O 2À , 529.7 eV), highly oxidative oxygen (O 2 2À /O 2 À , 530.5 eV) and adsorbed oxygen (O À , 531.5 eV). [19] These newly generated oxygen species (O 2À , O 2 2À , O 2 À and O À ) suggest oxygen spillover from YSZ to the surface of porous CeO 2 single crystal during ethane oxidation. O 2 2À and O 2 À , as well as surface lattice O 2À , participate in selective oxidation of ethane to ethylene, but O À species tend to induce the deep oxidation of ethane.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Oxidative Dehydrogenation of Ethane to Ethylene in a Solid Oxide Electrolyzer

Duan

Xie

2021

Angewandte Chemie

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Oxidative dehydrogenation of ethane to ethylene is an important process in light olefin industry; however, the over‐oxidation of ethane leads to low ethylene selectivity. Here, we report a novel approach to electrochemical oxidative dehydrogenation of ethane in anode in conjunction with CO2 reduction at cathode in a solid oxide electrolyser using a porous single‐crystalline CeO2 electrode at 600 °C. We identify and engineer the flux and chemical states of active oxygen species that evolve from the lattice at anode surface to activate and dehydrogenate ethane to ethylene via the reaction of epoxy species. Active oxygen species (O2−, O22− and O2−) at the anode surface effectively dehydrogenate ethane to ethylene, but O− species tend to induce deep oxidation. We demonstrate exceptionally high ethylene selectivity of 95 % and an ethane conversion of 10 % with a durable operation of 300 h.

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“…The lower preparation temperature of infiltration method can avert the high‐temperature‐induced delamination of the electrode and the coarsening of the electrode materials . Besides, catalysts with high activity and poor thermal stability can also be employed as the electrode component by infiltration …”

Section: Cathode Materialsmentioning

confidence: 99%

High‐Temperature CO₂ Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects

et al. 2019

Self Cite

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which has caused serious global warming. According to Intergovernmental Panel on Climate Change, global warming of 1.5 °C above preindustrial levels will come true by 2055 and bring about severe environmental and ecological issues, [2] such as ocean acidification, sea level rise, and species extinction. Therefore, it is urgently needed to reduce the atmospheric CO 2 concentration. [3] Apart from utilizing renewable energy resources to substitute for fossil fuels, CO 2 capture and storage (CCS) processes, and CO 2 capture and utilization (CCU) processes have been developed to effectively diminish the existing atmospheric CO 2 concentration. [4] The CCS processes are often expensive and laborious, and face the risk of CO 2 leakage, while the CCU processes are able to convert the captured CO 2 to value-added carbon-containing chemicals powered by external energy and has attracted more and more research interests recently. However, the conversion of CO 2 to target products is relatively difficult due to its extremely stable CO bonds. Several approaches for CO 2 conversion have been developed, such as photosynthesis, thermocatalytic reduction, electrochemical reduction, and photochemical conversion. Compared with other approaches, electrochemical reduction is more attractive because of two reasons: 1) electrochemical reduction process is controllable through adjusting the applied voltage and reaction temperature, and 2) the process can utilize renewable energy resources such as wind, solar, hydroelectric, and geothermal energies to electrochemically convert CO 2 to useful chemicals, which forms a carbon-neutral energy cycle and simultaneously provides an efficient storage method for renewable energy resources.Several types of electrolysis cell have been systematically investigated for CO 2 electroreduction as listed in Table 1. The first type operates in H-shaped electrochemical cells with liquid electrolyte at low temperatures (<100 °C).[5] Gaseous CO 2 reactant is dissolved into the liquid electrolyte and transported to the electrode surface, which is subsequently electroreduced to CO, HCOOH, CH 4 , C 2 H 4 , C 2 H 5 OH, and so on. [1,6] Although high Faradaic efficiency of products from CO 2 electroreduction has been achieved by exploring efficient catalysts recently, the current density of CO 2 electrolysis is relatively low due to the low CO 2 solubility and the competitive High-temperature CO 2 electrolysis in solid-oxide electrolysis cells (SOECs) could greatly assist in the reduction of CO 2 emissions by electrochemically converting CO 2 to valuable fuels through effective electrothermal activation of the stable CO bond. If powered by renewable energy resources, it could also provide an advanced energy-storage method for their intermittent output. Compared to low-temperature electrochemical CO 2 reduction, CO 2 electrolysis in SOECs at high temperature exhibits higher current density and energy efficiency and has thus attracted much recent attention. The history of its development and its fundamental mech...

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Oxygen Evolution Reaction over the Au/YSZ Interface at High Temperature

Cited by 37 publications

References 37 publications

Double Active Sites in Co–N_x–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

Double Active Sites in Co–N_x–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

Electrochemical Oxidative Dehydrogenation of Ethane to Ethylene in a Solid Oxide Electrolyzer

High‐Temperature CO₂ Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects

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Oxygen Evolution Reaction over the Au/YSZ Interface at High Temperature

Cited by 37 publications

References 37 publications

Double Active Sites in Co–Nx–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

Double Active Sites in Co–Nx–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

Electrochemical Oxidative Dehydrogenation of Ethane to Ethylene in a Solid Oxide Electrolyzer

High‐Temperature CO2 Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects

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Product

Resources

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Double Active Sites in Co–N_x–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

Double Active Sites in Co–N_x–C@Co Electrocatalysts for Simultaneous Production of Hydrogen and Carbon Monoxide

High‐Temperature CO₂ Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects