Details

Autor(en) / Beteiligte

• Li, Yuhang
• Xu, Aoni
• Lum, Yanwei
• Wang, Xue
• Hung, Sung-Fu
• Chen, Bin
• Wang, Ziyun
• Xu, Yi
• Li, Fengwang
• Abed, Jehad
• Huang, Jianan Erick
• Rasouli, Armin Sedighian
• Wicks, Joshua
• Sagar, Laxmi Kishore
• Peng, Tao
• Ip, Alexander H.
• Sinton, David
• Jiang, Hao
• Li, Chunzhong
• Sargent, Edward H.

Titel

Promoting CO2 methanation via ligand-stabilized metal oxide clusters as hydrogen-donating motifs

Ist Teil von

• Nature communications, 2020-12, Vol.11 (1), p.6190-6190, Article 6190

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abstract Electroreduction uses renewable energy to upgrade carbon dioxide to value-added chemicals and fuels. Renewable methane synthesized using such a route stands to be readily deployed using existing infrastructure for the distribution and utilization of natural gas. Here we design a suite of ligand-stabilized metal oxide clusters and find that these modulate carbon dioxide reduction pathways on a copper catalyst, enabling thereby a record activity for methane electroproduction. Density functional theory calculations show adsorbed hydrogen donation from clusters to copper active sites for the *CO hydrogenation pathway towards *CHO. We promote this effect via control over cluster size and composition and demonstrate the effect on metal oxides including cobalt(II), molybdenum(VI), tungsten(VI), nickel(II) and palladium(II) oxides. We report a carbon dioxide-to-methane faradaic efficiency of 60% at a partial current density to methane of 135 milliampere per square centimetre. We showcase operation over 18 h that retains a faradaic efficiency exceeding 55%.