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| targeted composition | before catalysis | after 10 h HER | after 1 h OER |
|---|---|---|---|
| Ni0.25Rh1.75P1.00 | Ni0.28(4)Rh1.72(4)P1.03(16) | Ni0.24(2)Rh1.76(2)P0.98(10) | Ni0.29(2)Rh1.71(2)P1.01(21) |
| Rh2.00P1.00 | Rh2.00(10)P1.01(6) | Rh2.00(9)P1.04(9) | Rh2.00(8)P0.97(18) |
P was normalized assuming the metals sum to 2.0. Values in parentheses reflect the standard deviation in the composition.
