Electrochemical oxidation of ethylene glycol on TiO2-supported platinum single-atom catalyst into valuable chemicals in alkaline media

Ayele, Adane Abebe; Tsai, Meng‐Che; Adam, Desalew Berihun; Awoke, Yohannes Ayele; Huang, Wei‐Hsiang; Chang, Chia-Yu; Liao, Siao-Chun; Huang, Peiyu; Chen, Jeng-Lung; Pao, Chih‐Wen; Su, Wei‐Nien; Hwang, Bing‐Joe

doi:10.1016/j.apcata.2022.118861

Applied Catalysis A: General

2022

DOI: 10.1016/j.apcata.2022.118861

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Electrochemical oxidation of ethylene glycol on TiO2-supported platinum single-atom catalyst into valuable chemicals in alkaline media

Adane Abebe Ayele

Meng‐Che Tsai

Desalew Berihun Adam

et al.

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2024

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Cited by 10 publications

References 41 publications

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Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Li,

Wu,

Wang

et al. 2024

Angewandte Chemie

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The anodic methanol oxidation reaction (MOR) plays a crucial role in coupling with the cathodic hydrogen evolution reaction (HER) and enables the sustainable production of the high‐valued formate. Nickel‐based hydroxide (Ni(OH)2) as MOR electrocatalyst has attracted enormous attention. However, the key factor determining the intrinsic catalytic activity remains unknown, which significantly hinders the further development of Ni(OH)2 electrocatalyst. Here, we found that the dx2‐y2 electronic state within antibonding bands plays a decisive role in the whole MOR process. The onset potential depends on the deprotonation ability (Ni2+ to Ni3+), which was closely related to the band center of dx2‐y2 orbital. The closer of dx2‐y2 orbital to the Fermi level showed the stronger the deprotonation ability. Meanwhile, in the high potential region, the broadening of dx2‐y2 orbital would facilitate the electron transfer from methanol to catalysts (Ni3+ to Ni2+), further enhancing the catalytic properties. Our work for the first time clarifies the intrinsic relationship between dx2‐y2 electronic state and the MOR activities, which adds a new layer of understanding to the methanol electrooxidation research scene.

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Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Li,

Wu,

Wang

et al. 2024

Angewandte Chemie

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Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Li,

Wu,

Wang

et al. 2024

Angew Chem Int Ed

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Pt Single Atoms Loaded on Thin‐Layer TiO₂ Electrodes: Electrochemical and Photocatalytic Features

Zhou,

Wang,

Denisov

et al. 2024

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Recently, the use of Pt in the form of single atoms (SA) has attracted considerable attention to promote the cathodic hydrogen production reaction from water in electrochemical or photocatalytic settings. First, produce suitable electrodes by Pt SA deposition on Direct current (DC)‐sputter deposited titania (TiO2) layers on graphene—these electrodes allow to characterization of the electrochemical properties of Pt single atoms and their investigation in high‐resolution HAADF‐STEM. For Pt SAs loaded on TiO2, electrochemical H2 evolution shows only a very small overpotential. Concurrent with the onset of H2 evolution, agglomeration of the Pt SAs to clusters or nanoparticles (NPs) occurs. Potential cycling can be used to control SA agglomeration to variable‐size NPs. The electrochemical activity of the electrode is directly related to the SA surface density (up to reaching the activity level of a plain Pt sheet). In contrast, for photocatalytic H2 generation already a minimum SA density is sufficient to reach control by photogenerated charge carriers. In electrochemical and photocatalytic approaches a typical TOF of ≈100–150 H2 molecules per second per site can be reached. Overall, the work illustrates a straightforward approach for reliable electrochemical and photoelectrochemical investigations of SAs and discusses the extraction of critical electrochemical factors of Pt SAs on titania electrodes.

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Electrochemical oxidation of ethylene glycol on TiO2-supported platinum single-atom catalyst into valuable chemicals in alkaline media

Cited by 10 publications

References 41 publications

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Pt Single Atoms Loaded on Thin‐Layer TiO₂ Electrodes: Electrochemical and Photocatalytic Features

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Electrochemical oxidation of ethylene glycol on TiO2-supported platinum single-atom catalyst into valuable chemicals in alkaline media

Cited by 10 publications

References 41 publications

Unveiling the Pivotal Role of dx2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Unveiling the Pivotal Role of dx2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Unveiling the Pivotal Role of dx2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Pt Single Atoms Loaded on Thin‐Layer TiO2 Electrodes: Electrochemical and Photocatalytic Features

Contact Info

Product

Resources

About

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Pt Single Atoms Loaded on Thin‐Layer TiO₂ Electrodes: Electrochemical and Photocatalytic Features