Kim Chansol, Song Ji-Yoon, Choi Changhyeok, Ha Jin Pil, Lee Wonmoo, Nam Yoon Tae, Lee Dong-Myeong, Kim Gunjoo, Gereige Issam, Jung Woo-Bin, Lee Hyunjoo, Jung Yousung, Jeong Hyeonsu, Jung Hee-Tae
KAIST-UCB-VNU Global Climate Change Research Center, Department of Chemical & Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Korea.
Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA.
Adv Mater. 2022 Oct;34(40):e2205270. doi: 10.1002/adma.202205270. Epub 2022 Sep 4.
Ruthenium (Ru) is the most widely used metal as an electrocatalyst for nitrogen (N ) reduction reaction (NRR) because of the relatively high N adsorption strength for successive reaction. Recently, it has been well reported that the homogeneous Ru-based metal alloys such as RuRh, RuPt, and RuCo significantly enhance the selectivity and formation rate of ammonia (NH ). However, the metal combinations for NRR have been limited to several miscible combinations of metals with Ru, although various immiscible combinations have immense potential to show high NRR performance. In this study, an immiscible combination of Ru and copper (Cu) is first utilized, and homogeneous alloy nanoparticles (RuCu NPs) are fabricated by the carbothermal shock method. The RuCu homogeneous NP alloys on cellulose/carbon nanotube sponge exhibit the highest selectivity and NH formation rate of ≈31% and -73 μmol h cm , respectively. These are the highest values of the selectivity and NH formation rates among existing Ru-based alloy metal combinations.
钌（Ru）是用于氮（N₂）还原反应（NRR）的电催化剂中使用最广泛的金属，因为其对连续反应具有相对较高的氮吸附强度。最近，有充分报道称，诸如RuRh、RuPt和RuCo等均相Ru基金属合金显著提高了氨（NH₃）的选择性和生成速率。然而，用于NRR的金属组合仅限于与Ru的几种可混溶金属组合，尽管各种不可混溶组合具有显示高NRR性能的巨大潜力。在本研究中，首次利用了Ru和铜（Cu）的不可混溶组合，并通过碳热冲击法制备了均相合金纳米颗粒（RuCu NPs）。纤维素/碳纳米管海绵上的RuCu均相NP合金分别表现出最高的选择性和NH₃生成速率，约为31%和-73 μmol h⁻¹ cm⁻²。这些是现有Ru基合金金属组合中选择性和NH₃生成速率的最高值。
