Premium
Is It Appropriate to Use the Nafion Membrane in Electrocatalytic N 2 Reduction?
Author(s) -
Ren Yongwen,
Yu Chang,
Tan Xinyi,
Han Xiaotong,
Huang Hongling,
Huang Huawei,
Qiu Jieshan
Publication year - 2019
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201900474
Subject(s) - nafion , membrane , ammonia , anode , chemistry , electrochemistry , inorganic chemistry , chemical engineering , electrode , organic chemistry , biochemistry , engineering
The electrocatalytic N 2 reduction reaction (ENRR) to ammonia has attracted much attention due to the mild operating conditions, in which the Nafion membrane is generally adopted to separate the ammonia from the anode products. However, it has been mentioned that the Nafion membrane allows ammonia to pass through and traps the ammonia to some extent, but powerful confirmation experiments and effective solutions are still lacking. Herein, it is experimentally confirmed that the use of the Nafion membrane in the ENRR is inappropriate, based on the results that the ammonia can pass through the membrane, be adsorbed on the membrane, and interact with the membrane. This causes a measurement error and accelerates the membrane degradation process, which is unfavorable for ammonia quantification and the long‐term stability operation of the ENRR in practical application. Also, for the first time, a more accurate method to evaluate the activity of the ENRR electrocatalyst using a salt bridge to replace the Nafion membrane is presented.