可用于电动汽车的铝-空气燃料电池,通常以NaCl溶液或NaOH溶液为电解

可用于电动汽车的铝-空气燃料电池,通常以NaCl溶液或NaOH溶液为电解液,铝合金为负极,空气电极为正极。下列说法正确的是

A.以NaCl溶液或NaOH溶液为电解液时,正极反应都为:O22H2O4e4OH

B.以NaOH溶液为电解液时,负极反应为:Al3OH3e-Al(OH)3

C.以NaOH溶液为电解液时,电池在工作过程中电解液的pH保持不变

D.电池工作时,电子通过外电路从正极流向负极

答案

A

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