Electrical Pulse‐Driven Periodic Self‐Repair of Cu‐Ni Tandem Catalyst for Efficient Ammonia Synthesis from Nitrate
State Key Laboratory of Pollution Control and Resource Reuse · Nanjing University · +1 more institution
Abstract
Abstract Electrocatalytic nitrate reduction sustainably produces ammonia and alleviates water pollution, yet is still challenging due to the kinetic mismatch and hydrogen evolution competition. Cu/Cu 2 O heterojunction is proven effective to break the rate‐determining NO 3 − ‐to‐NO 2 − step for efficient NH 3 conversion, while it is unstable due to electrochemical reconstruction. Here we report a programmable pulsed electrolysis strategy to achieve reliable Cu/Cu 2 O structure, where Cu is oxidized to CuO during oxidation pulse, then regenerating Cu/Cu 2 O upon reduction. Alloying with Ni further modulates hydrogen adsorption, which transfers from Ni/Ni(OH) 2 to N‐containing intermediates on Cu/Cu 2 O,…
Citation impact
- FWCI
- 11.54
- Percentile
- 100%
- References
- 47
Authors
6- YBYongguang BuCorresponding
State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University
- CWChao Wang
Yangzhou University
- WZWenkai Zhang
State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University
- XYXiaohan Yang
State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University
- JDJie Ding
State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University
Topics & keywords
- Catalysis
- Ammonia
- Electrochemistry
- Electrolysis
- Nitrate
- Materials science
- Ammonia production
- Inorganic chemistry