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Promoted Electrocatalytic Nitrogen Fixation in Fe‐Ni Layered Double Hydroxide Arrays Coupled to Carbon Nanofibers: The Role of Phosphorus Doping
Author(s) -
Liu YiTao,
Tang Lu,
Dai Jin,
Yu Jianyong,
Ding Bin
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202005579
Subject(s) - faraday efficiency , layered double hydroxides , hydrotalcite , inorganic chemistry , materials science , electrochemistry , hydroxide , nitrogen , phosphorus , adsorption , carbon fibers , doping , chemical engineering , metal , catalysis , chemistry , electrode , composite number , organic chemistry , optoelectronics , composite material , engineering , metallurgy
The key to bringing the electrocatalytic nitrogen fixation from conception to application lies in the development of high‐efficiency, cost‐effective electrocatalysts. Layered double hydroxides (LDHs), also known as hydrotalcites, are promising electrocatalysts for water splitting due to multiple metal centers and large surface areas. However, their activities in the electrocatalytic nitrogen fixation are unsatisfactory. Now, a simple and effective way of phosphorus doping is presented to regulate the charge distribution in LDHs, thus promoting the nitrogen adsorption and activation. The P‐doped LDHs are further coupled to a self‐supported, conductive matrix, that is, a carbon nanofibrous membrane, which prevents their aggregation as well as ensuring rapid charge transfer at the interface. By this strategy, decent ammonia yield (1.72×10 −10 mol s −1 cm −2 ) and Faradaic efficiency (23 %) are delivered at −0.5 V vs. RHE in 0.1 m Na 2 SO 4 .