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A series of supported tungsten phosphide catalysts were prepared by the method of temperature-programmed reduction of phospho-tungstate in hydrogen.
本文采用氢气程序升温还原磷钨酸盐的方法,制备了一系列负载型磷化钨催化剂。
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State-owned groups, particularly in the oil and natural resources sectors, have stepped up their hunt for overseas companies and assets on sale because of the global crisis.
国有企业--特别是石油和天然资源领域的企业--已加快脚步,物色因全球危机而待售的海外企业和资产。
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But the conventional cleaning method can't achieve our need when cleaning 2 μm thickness cuprum foil.
极薄的铜箔是惯性约束聚变中常用的靶材之一,要求密度达到晶体理论密度、表面洁净、粗糙度低、润湿性好,用常规方法清洗厚度在2 μm及以下的铜箔,难以达到要求。