Ru-based catalysts are rarely considered for water gas shift (WGS) reaction due to either inferior activity or methanation side reaction. Here, Ru₁/FeO_x single-atom catalyst is synthesized via a co-precipitation method, which can realize high CO conversion with low loading of 0.18 wt. % and stable specific rates with ~3 times higher than Ru nanoparticles (NPs) with loading of 2.00 wt. % at 300 °C. Moreover, it shows no formation of methanation byproducts even under CO₂- and H₂-rich WGS stream which can occur on Ru NPs. Detailed characterizations demonstrate that Ru single atoms have stronger interaction with FeO_x to form dual active sites for WGS reaction. The positive Ru₁ species own rather weaker bonded CO* and the neighbored FeO_x can help activate H₂O to generate OH*, which then react facilely via an associative process. Meanwhile, the single atom Ru prohibits the dissociation of H₂ with low adsorption strength to avoid the methanation.

由于活性较差或甲烷化副反应，Ru 基催化剂很少被考虑用于水煤气变换 (WGS) 反应。在这里，Ru ₁ /FeO _x单原子催化剂是通过共沉淀法合成的，它可以实现高 CO 转化率和 0.18 wt 的低负载量。% 和稳定的比速率，比负载为 2.00 wt. 的钌纳米粒子 (NPs) 高约 3 倍。% 在 300 °C。此外，即使在可能发生在 Ru NPs 上的富含 CO ₂ - 和 H ₂的 WGS 流下，也没有形成甲烷化副产物。详细表征表明，Ru单原子与FeO _x具有更强的相互作用，形成WGS反应的双活性位点。正Ru ₁物种拥有相当弱的键合CO*，而相邻的FeO _x可以帮助激活H ₂ O 生成OH*，然后通过缔合过程轻松反应。同时，单原子Ru阻止了吸附强度低的H _{2的解离，从而避免了甲烷化。}