Wang Jin, Wang Shuang, Li Jinping
College of Environmental Science and Engineering, Taiyuan University of Technology, Jinzhong 030600, Shanxi, P.R. China.
Dalton Trans. 2020 Feb 21;49(7):2258-2263. doi: 10.1039/c9dt04827h. Epub 2020 Feb 3.
In this study, we report sulfur-doped three-dimensional graphene (S-3DG) as a metal-free electrocatalyst for N reduction reaction (NRR) under ambient conditions. Due to the high electron transport capacity and stable physicochemical properties of 3DG, it was utilized to improve the NRR catalytic performance dramatically. Hence, in 0.05 M HSO the S-3DG achieved a remarkably large NH yield of 38.81 μg mg h and a high faradaic efficiency of 7.72% at -0.6 V versus a reversible hydrogen electrode (RHE), which is superior to most non-metal catalysts. Notably, it shows such outstanding selectivity that no hydrazine by-products were detected and the electrochemical stability passed a long-term durability test.
在本研究中，我们报道了硫掺杂的三维石墨烯（S-3DG）作为一种在环境条件下用于氮还原反应（NRR）的无金属电催化剂。由于三维石墨烯具有高电子传输能力和稳定的物理化学性质，它被用于显著提高NRR催化性能。因此，在0.05 M硫酸中，相对于可逆氢电极（RHE），S-3DG在-0.6 V时实现了38.81 μg mg⁻¹ h⁻¹的显著高NH₃产率和7.72%的高法拉第效率，这优于大多数非金属催化剂。值得注意的是，它表现出如此出色的选择性，未检测到肼副产物，并且电化学稳定性通过了长期耐久性测试。
