Electrocatalytically generating synthesis gas (syngas, CO + H₂) from aqueous CO₂ requires balancing the relative rates of CO and H₂ generation such that the needed range of desired syngas compositions can be achieved. By purposely integrating two distinct catalytic materials, one for H₂ generation and one for CO generation, we deliberately aligned the rates of these two reactions, thereby enhancing syngas tunability as a function of potential. A modular synthetic approach enabled the systematic surface decoration of Au nanostructured electrocatalysts with a series of 3d transition metals, Co, Ni, and Fe, which augmented the selective CO generation of the Au substrate with rapid H₂ generation. The resulting rate-aligned electrocatalyst generates—in contrast with the non-rate-aligned control—a wide range of desirable syngas compositions over a 200 mV range, all at current densities greater than 50 mA/cm².

由含水的CO ₂电催化生成合成气（合成气，CO + H ₂）需要平衡CO和H ₂生成的相对速率，以便可以实现所需合成气组成的所需范围。通过有目的地整合两种不同的催化材料，一种用于H ₂生成，一种用于CO生成，我们刻意调整了这两个反应的速率，从而增强了合成气的可调谐性（作为势能的函数）。模块化的合成方法可对具有一系列3d过渡金属Co，Ni和Fe的Au纳米结构电催化剂进行系统的表面装饰，从而通过快速H ₂增强了Au基底的选择性CO生成一代。与非速率对齐的对照相比，所得的速率对齐的电催化剂在200 mV的范围内产生了多种理想的合成气成分，所有这些合成气的电流密度均大于50 mA / cm ²。