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七十年代,发现了由稀土与过渡金属元素间形成的许多稀土金属间化合物具有极大的贮氢能力。它们可在较低的温度和压力下,可逆地大量吸收或释放氢。Kuijpers和Loopstra利用对PrCo_5D_4进行的中
In the seventies, many rare earth metal compounds formed between rare earth and transition metal elements were found to have great hydrogen storage capacity. They absorb and release large amounts of hydrogen reversibly at lower temperatures and pressures. Kuijpers and Loopstra make use of PrCo_5D_4