某固体酸燃料电池以CsHSO4固体为电解质传递H+,其基本结构如图所

某固体酸燃料电池以CsHSO4固体为电解质传递H,其基本结构如图所示,电池总反应可表示为:2H2O2===2H2O,下列有关说法正确的是(  )

A.电子通过外电路从b极流向a

Bb极上的电极反应式为:O22H2O4e===4OH

C.每转移0.1 mol电子,消耗1.12 LH2

DHa极通过固体酸电解质传递到b

答案

解析:选D。本题考查原电池知识,意在考查学生的分析能力。该原电池的化学原理是H2被氧化,在负极(a)发生反应:H22e===2HHa极转移到b极,D项正确;O2发生还原反应,在正极(b)发生反应:O24H4e===2H2O,则电子从a极流向b极,AB项不正确;C项因未指明气体所处的温度和压强,不正确。

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