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TABLE 15. - EXPERIMENTAL CHROMIUM ELECTRODES Substrate Cleaning Gold catalysts Catalyst Gold co~nt. Dlscharge Conments and lot fMI carbon felt - 8/79 treatment HZS04 HN03 HN03 HF KOH Hzx(1600· F) None HN03 HZS04 H C l KOti method Thermal Thermal Electroplated 1:1ectrop1ated Thermal Electroplated Self-plated Pb only Pb only T h e r m a l Thermal Thermal Thermal Thermal Thermal Thermal Thermal Pb only Thermal Thermal Thermal solvent - IIgl dlp! FMI carbon felt - 1/80 HZO MeOH/HZO HZO HZO HZO H2O E T O H / H2 0 MeOH/ H20 H2O H2O Me(JH/H,O MeOH/ H20 MeOH/ H20 KOHl H20 MeOH/H20 -------- MeOH/HZO MeOH/H,O HZO lZ.5 No lZ.5 No lZ.5 Yes 6 No 1Z.5 No Z5 -- 1Z.5 --- 0 Yes 0 Yes l Z . 5 No 12.5 No - High Hl High HZ after reversal High HZ Moderate HZ Low HZ. best performance Hlgh HZ HlgilHZ Low HZ Moderate H2 MOdergte H2. slow Cr+ reduct 10n Low H2. good Cr+3 reauctlon. Dest performance ~lOderate Hl Hlgh H2 Hlgh H, Moderate tiZ Hlgh H2 Moderate HZ Low H,. best performance Moderate H2 Hlgll H£ Moderate HZ ~loderate Moderate Hl. poor dlscharge characterlstlcs Low H£ Low Hi' best performance Moderate HZ FMI carbon KOH felt - 1/80 FMI carbon KOH felt - 8180 FMI carbon KOH felt - 1l/80 HCl Carborundum KOH 0.635-cm 11/4-1n.) graphlte Ultracarbon None pUrlfled graph 1te KOH FMl carbon HN03 felt - lU/80 UTC carbon None plate KOH Hel H2SO4 50 No 12.5 No 12.5 No 12.5 No 12.5 No 0 Yes 12.5 No 1Z.:' No 1.7 Yes 14 No 14 No 14 1'10 Electroplated 25 Yes H2SO4 None HN03 Thermal H2O 12.5 --- 17 NoPDF Image | NASA Redox Storage System Development Project 1980
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