Details

Autor(en) / Beteiligte

• Liu, Yipu
• Yu, Guangtao
• Li, Guo-Dong
• Sun, Yuanhui
• Asefa, Tewodros
• Chen, Wei
• Zou, Xiaoxin

Titel

Coupling Mo2C with Nitrogen-Rich Nanocarbon Leads to Efficient Hydrogen-Evolution Electrocatalytic Sites

Ist Teil von

• Angewandte Chemie, 2015-09, Vol.127 (37), p.10902-10907

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2015

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• In our efforts to obtain electrocatalysts with improved activity for water splitting, meticulous design and synthesis of the active sites of the electrocatalysts and deciphering how exactly they catalyze the reaction are vitally necessary. Herein, we report a one‐step facile synthesis of a novel precious‐metal‐free hydrogen‐evolution nanoelectrocatalyst, dubbed Mo2C@NC that is composed of ultrasmall molybdenum carbide (Mo2C) nanoparticles embedded within nitrogen‐rich carbon (NC) nanolayers. The Mo2C@NC hybrid nanoelectrocatalyst shows remarkable catalytic activity, has great durability, and gives about 100 % Faradaic yield toward the hydrogen‐evolution reaction (HER) over a wide pH range (pH 0–14). Theoretical calculations show that the Mo2C and N dopants in the material synergistically co‐activate adjacent C atoms on the carbon nanolayers, creating superactive nonmetallic catalytic sites for HER that are more active than those in the constituents. Hybridkatalysator: Ein effizienter Elektrokatalysator für die Wasserstoffentwicklung bestehend aus Mo2C‐Nanopartikeln eingebettet in stickstoffreiche Kohlenstoffnanoschichten wurde in einem Schritt aus preiswerten Materialien hergestellt. Der synergistische Effekt zwischen Mo2C und den N‐Dotanden führt zu hoch aktiven nichtmetallischen Katalysezentren auf den Kohlenstoffnanoschichten.