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. Author manuscript; available in PMC: 2012 Sep 7.
Published in final edited form as: Phys Chem Chem Phys. 2012 Jul 24;14(33):11673–11688. doi: 10.1039/c2cp41957b

Figure 6.

Figure 6

Activity recovered by reheat-treatment in argon of the acid-washed catalyst of reference 28, having a similar Fe content (0.20 wt% Fe) than the catalyst used in Figure 4a (0.27 wt% Fe). (a) Normalized activity, based on that of the original catalyst (Ocat), as measured in RDE (open circles) or PEM fuel cell (filled squares) at various steps of five successive acid washing / reheat-treatment cycles. Acid washed and reheat-treated catalysts are labeled AWx and RTHx, respectively, x denoting the cycle number. (b) Bulk Fe content at each step of the five acid washing / reheat-treatment cycles described in (a), as measured by neutron activation analysis.