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卡片总数: 1 张•内容版本: v4•公开卡包•更新时间: 8/1/2026
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正面 (问题)
describe the reactions that take place in a hydrogen fuel cell with half equations and overall equation.
背面 (解答)
• hydrogen supplied at anode loses electrons to form ions: 2H2 -> 4H^+ + 4 e^- • oxygen is supplied at cathode; hydrogen ions at anode travel through electrolyte to cathode to react with oxygen to form water: O2 + 4H^+ + 4e^- -> 2H2O • overall, hydrogen fuel is oxidised to form water: 2H2 + O2 -> 2H2O