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. 2017 Oct 20;2(10):7039–7047. doi: 10.1021/acsomega.7b01151

Table 2. Surface Composition (Atomic Percentage) of WO3·H2O Nanoplates before and after CV Cycles in 0.5 M H2SO4, and WO3 Nanoplates Measured by XPS and AES.

  atomic % by XPS
 atomic % by AES
sample W % O % W % O %
WO3·H2O 19.83 80.17 20.9 79.1
WO3·H2O after CV cycles 24.47 75.53 22.4 77.6
WO3 23.88 76.72 25.4 74.6