MgAl layered double hydroxide (LDH) for promoting ammonia synthesis in non-thermal plasma: Role of surface oxygen vacancy

Yuxin Zhang, Shuncheng Li, Boya Qiu, Shaowei Chen, Huanhao Chen, Xiaolei Fan

Research output: Journal PublicationArticlepeer-review

Abstract

Here, the MgAl layered double hydroxide (LDH) supports and relevant metal on LDH catalysts (i.e., Ni, Co, and Ru) were prepared and investigated under non thermal plasma (NTP) conditions to probe the role of surface oxygen vacancy (OV) in NTP-assisted ammonia (NH3) synthesis. The findings show that OV on the LDH carrier is highly beneficial to NH3 formation under NTP conditions, and concentration of OV on the LDH can be regulated by the post-synthesis calcination and hydrogen plasma etching. Additionally, loading of active metal species on the LDH could promote the NH3 synthesis further due to presence of multiple reaction pathways and the synergy between the surface OV and metal sites in such NTP-catalytic systems. As the result, the catalysts developed by this work showed high ammonia synthesis rates of 4.42−4.52 mmol g−1 h−1 and energy efficiencies of 1.67−1.71 gNH3 kWh−1, respectively. The findings of the work pave the way for the rational design and optimization of highly efficient catalysts with dual active sites for intensifying the NTP-catalytic ammonia synthesis.

Original languageEnglish
Article number109608
JournalChemical Engineering and Processing: Process Intensification
Volume195
DOIs
Publication statusPublished - Jan 2024

Keywords

  • Ammonia (NH) synthesis
  • Catalysis
  • Layered double hydroxide (LDH)
  • Non-thermal plasma (NTP)
  • Oxygen vacancy

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'MgAl layered double hydroxide (LDH) for promoting ammonia synthesis in non-thermal plasma: Role of surface oxygen vacancy'. Together they form a unique fingerprint.

Cite this