platinum sponge

noun

Definition of platinum sponge

: metallic platinum in a gray porous spongy form that is obtained by reducing ammonium chloroplatinate, that occludes large volumes of oxygen, hydrogen, and other gases, and that is used as a catalyst

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“Platinum sponge.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/platinum%20sponge. Accessed 24 Nov. 2020.

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