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The effect of the surface modification of a fluorine‐doped tin oxide (FTO) electrode with an Sb‐containing mixed metal oxide on the oxidative production of H 2 O 2 from H 2 O was investigated. The initial faradaic efficiency for H 2 O 2 production (FE(H 2 O 2 )) reached 98 % when CuSb 2 O x /FTO was used as the anode, as a consequence of the suppression of O 2 generation via four‐electron oxidation of H 2 O. InSbO x modification of FTO resulted in a suppression of the oxidative decomposition of H 2 O 2 to O 2 . The double‐layer composite electrode InSbO x /CuSb 2 O x /FTO indicated the advantageous traits of both Sb‐containing mixed metal oxides, and this composite electrode showed superior FE(H 2 O 2 ), current‐potential dependence, and stability to other electrodes such as CuSb 2 O x /FTO, InSbO x /FTO, and Al 2 O 3 /BiVO 4 /FTO.
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Miyase et al. (2020) studied this question.
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