Unknown

Dataset Information

0

Plasma-Induced Catalyst Support Defects for the Photothermal Methanation of Carbon Dioxide.


ABSTRACT: The presence of defects in a catalyst support is known to benefit catalytic activity. In this work, a He-plasma treatment-based strategy for introducing and stabilising defects on a Ni/TiO2 catalyst for photothermal CO2 hydrogenation was established. The impact of pretreatment step sequence-which comprised He-plasma treatment and reduction/passivation-on defect generation and stabilisation within the support was evaluated. Characterisation of the Ni/TiO2 catalysts indicated that defects created in the TiO2 support during the initial plasma treatment stage were then stabilised by the reduction/passivation process, (P-R)Ni/TiO2. Conversely, performing reduction/passivation first, (R-P)Ni/TiO2, invoked a resistance to subsequent defect formation upon plasma treatment and consequently, poorer photothermal catalytic activity. The plasma treatment altered the metal-support interaction and ease of catalyst reduction. Under photothermal conditions, (P-R)Ni/TiO2 reached the highest methane production in 75 min, while (R-P)Ni/TiO2 required 165 min. Decoupling the impacts of light and heat indicated thermal dominance of the reaction with CO2 conversion observed from 200 °C onwards. Methane was the primary product with carbon monoxide detected at 350 °C (~2%) and 400 °C (~5%). Overall, the findings demonstrate the importance of pretreatment step sequence when utilising plasma treatment to generate active defect sites in a catalyst support.

SUBMITTER: Jantarang S 

PROVIDER: S-EPMC8347005 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

altmetric image

Publications

Plasma-Induced Catalyst Support Defects for the Photothermal Methanation of Carbon Dioxide.

Jantarang Salina S   Ligori Simone S   Horlyck Jonathan J   Lovell Emma C EC   Tan Tze Hao TH   Xie Bingqiao B   Amal Rose R   Scott Jason J  

Materials (Basel, Switzerland) 20210728 15


The presence of defects in a catalyst support is known to benefit catalytic activity. In this work, a He-plasma treatment-based strategy for introducing and stabilising defects on a Ni/TiO<sub>2</sub> catalyst for photothermal CO<sub>2</sub> hydrogenation was established. The impact of pretreatment step sequence-which comprised He-plasma treatment and reduction/passivation-on defect generation and stabilisation within the support was evaluated. Characterisation of the Ni/TiO<sub>2</sub> catalyst  ...[more]

Similar Datasets

| S-EPMC4213406 | biostudies-other
| S-EPMC5566444 | biostudies-literature
| S-EPMC8811444 | biostudies-literature
| S-EPMC9753482 | biostudies-literature
| S-EPMC6837228 | biostudies-literature
| S-EPMC7794506 | biostudies-literature
| S-EPMC8623454 | biostudies-literature
| S-EPMC6983406 | biostudies-literature
| S-EPMC10360055 | biostudies-literature
| S-EPMC10976602 | biostudies-literature