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首页> 外文会议>1st International conference on green propellant for space propulsion >ELECTROCATALYSIS IN HYDROGEN PEROXIDE FUEL CELLS
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ELECTROCATALYSIS IN HYDROGEN PEROXIDE FUEL CELLS

机译：过氧化氢燃料电池中的电解

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In situations where air is unavailable, a fuel cell must be supplied with an oxidant from a storage tank. Hydrogen peroxide is a rational choice. It is nontoxic, storable, and has high specific energy.rnThe noble metals usually used as oxygen electrocatalysts (platinum, palladium or gold) have two unwelcome side effects for hydrogen peroxide. First, theyrnheterogeneously decompose hydrogen peroxide to oxygen, resulting in a waste of propellant. Second, hydrogen peroxide does not behave as expected. Voltage is ～0.9 V below what is predicted and is independent of hydrogen peroxide concentration, only varying with pH. Hydrogen peroxide is apparently decomposed to an adsorbed layer of hydroxide radicals, and the reduction of the radicals to ions is the true electrode reaction.rnMetals that are weak catalysts for heterogeneous decomposition are studied for use as electrocatalysts. It is hoped that the propellant loss to decomposition will be lessened, without a severe loss of power. In addition, a correlation was found between voltage and strength of the M-OH adsorption bond.
机译：在没有空气的情况下，必须从储罐向燃料电池提供氧化剂。过氧化氢是一个合理的选择。它无毒，可储存且具有高比能。通常用作氧气电催化剂的贵金属（铂，钯或金）对过氧化氢有两种不受欢迎的副作用。首先，它们将过氧化氢非均相地分解为氧气，导致了推进剂的浪费。第二，过氧化氢的行为不符合预期。电压比预测值低约0.9 V，并且与过氧化氢浓度无关，仅随pH值变化。过氧化氢显然分解为氢氧根自由基的吸附层，并且将氢氧根还原为离子是真正的电极反应。研究了用作多相分解的弱催化剂的金属用作电催化剂。希望在不严重损失功率的情况下，减少推进剂分解的损失。另外，在电压和M-OH吸附键的强度之间发现相关性。

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