A Graphene Oxide‐Supported PdCu Catalyst for Enhanced Electrochemical Synthesis of Ammonia

• Published in: ChemCatChem 2023-11, Vol.15 (22), p.n/a
• Main Authors: Liang, Zhuangzhuang, Cao, Jianghui, Zhao, Fang, Song, Jiliang, Xue, Sensen, Hua, Qianqian, Ren, Xuefeng, Gao, Liguo, Ma, Tingli, Liu, Anmin
• Format: Article
• Language: English
• Subjects: alloys; Ammonia; ammonia synthesis; catalysis; Catalysts; Chemical synthesis; electrochemistry; Emissions; Graphene; Greenhouse gases; High temperature; Liquid phases; Reduction; supported catalysts
• ISSN: 1867-3880; 1867-3899
• DOI: 10.1002/cctc.202300970

The conventional Haber‐Bosch method for the ammonia synthesis process requires high temperature and pressure. Electrochemical synthesis of ammonia, an emerging ammonia synthesis technology, is a promising approach for sustainable ammonia production that is energy‐efficient and free of greenhouse gas emissions. The design and development of high‐performance catalysts are the keys to promoting the sustainable ammonia production process. This work synthesized a PdCu alloy catalyst loaded on a graphene oxide carrier through a simple liquid phase reduction method. Which greatly enhanced the catalytic performance with an ammonia yield of 1.62 mg h−1cm−2 and Faradaic efficiency of 38.2 % under the nitrate reduction ammonia synthesis (NO3RR) reaction at an overpotential of −0.4 V. For the nitrogen reduction ammonia (NRR), the ammonia yield was 20.83 μg h−1 cm−2 with a Faradaic efficiency of 3.8 %. This study may provide a new idea for material design and promote ammonia synthesis development under ambient conditions. A PdCu alloy catalyst loaded on a graphene oxide carrier was prepared through a simple liquid phase reduction method which greatly enhanced the catalytic performance with an ammonia yield of 1.62 mg h−1cm−2 and Faradaic efficiency of 38.2 % under the nitrate reduction ammonia synthesis (NO3RR) reaction at an overpotential of −0.4 V. For the nitrogen reduction ammonia, the ammonia yield was 20.83 μg h−1 cm−2 with a Faradaic efficiency of 3.8 %.