Deuterated ethylene is an important building block for manufacturing various deuterated polyolefins and chemicals. However, low-cost and large-scale production of deuterated ethylene still remain a great challenge. Herein, with D₂O as the D source, we first propose an electrocatalytic deuteration strategy for continuous production of deuterated ethylene from acetylene under ambient conditions. Specially, Ag nanoparticles exhibit a very high deuterated ethylene Faradic efficiency of up to 99.3% at –0.6 V vs. reversible hydrogen electrode. Meanwhile, Ag nanoparticles achieve a deuterated ethylene production rate of 3.72 × 10³ mmol h^–1 g_cat^–1 and an excellent long-term stability with deuterated ethylene Faradaic efficiencies of ∼95% in a two-electrode flow cell, which substantially outperform state-of-the-art values for previously reported deuterated alkenes. In-situ electrochemical Infrared absorption and Raman spectroscopies reveal superior acetylene absorption and formation of deuterated ethylene on Ag nanoparticles. This efficient electrocatalytic deuteration strategy opens a new window for continuous and economic production of deuterated alkenes.

氘化乙烯是制造各种氘化聚烯烃和化学品的重要组成部分。然而，低成本和大规模生产氘代乙烯仍然是一个巨大的挑战。在此，以 D ₂ O 作为 D 源，我们首先提出了一种电催化氘化策略，用于在环境条件下从乙炔连续生产氘代乙烯。特别是，与可逆氢电极相比，Ag 纳米粒子在 –0.6 V 时表现出非常高的氘化乙烯法拉第效率高达 99.3% 。^{同时，Ag 纳米粒子实现了 3.72 × 10 3} mmol h ^–1 g _cat ^–1的氘代乙烯生产率并且在双电极流通池中具有 ~95% 的氘代乙烯法拉第效率，具有出色的长期稳定性，这大大优于先前报道的氘代烯烃的最先进值。原位电化学红外吸收和拉曼光谱揭示了银纳米粒子上优异的乙炔吸收和氘化乙烯的形成。这种高效的电催化氘化策略为连续、经济地生产氘代烯烃打开了一扇新窗。