“Approximate” Pt layers hold great promise to be highly active and durable oxygen reduction reaction (ORR) catalysts. Electrodeposition of such layers on relevant catalyst supports, for example TiO_x, requires the application of a “Pt-on-Pt” deposition limiter to keep layers thin and leave no atom behind for catalysis. Classic Pt-on-Pt deposition limiting agents like CO and over-potential deposited hydrogen (H_opd) work reliably on gold but fail on TiO_x substrates. Iodide, in contrast, is a new “Pt-on-Pt” deposition limiting agent that shows substantial Pt layer thickness reduction during electrodeposition on gold as well as TiO_x substrates.

中文翻译：

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碘化物作为铂电沉积的终止剂

“近似” Pt层有望成为高活性和耐用的氧还原反应（ORR）催化剂。在相关的催化剂载体（例如TiO _x）上进行此类层的电沉积，需要使用“ Pt-on-Pt”沉积限制剂，以保持层薄且不留下任何原子用于催化。经典的Pt-on-Pt沉积限制剂（例如CO）和超电势沉积氢（H _opd）在金上可以可靠地工作，但在TiO _x基底上却不能。相比之下，碘化物是一种新型的“ Pt-on-Pt”沉积限制剂，在金以及TiO _x基底上进行电沉积时，Pt层厚度显着降低。