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. Author manuscript; available in PMC: 2020 May 15.
Published in final edited form as: Sens Actuators B Chem. 2019 Feb 19;287:584–594. doi: 10.1016/j.snb.2019.02.077

Figure 2.

Figure 2

Working principle of a formaldehyde fuel cell sensor. (A) Illustration of the structure and working principle of a formaldehyde fuel cell sensor. (B) The reaction scheme of formaldehyde oxidation on platinum in acid.