脫水冷凍法 的英文怎麼說
中文拼音 [tuōshuǐlěngdòngfǎ]
脫水冷凍法
英文
freezing- 脫 : Ⅰ動詞1 (脫落) cast; shed; drop; fall off 2 (取下; 除去) take off; strip; cast off 3 (脫離) ...
- 水 : 名詞1 (由兩個氫原子和一個氧原子結合而成的液體) water 2 (河流) river 3 (指江、河、湖、海、洋...
- 冷 : Ⅰ形容詞1 (溫度低; 感覺溫度低) cold:冷水 coldwater; 你冷不冷? do you feel cold?; are you feeling...
- 凍 : Ⅰ動詞1 (液體或含水分的東西遇冷凝固) freeze 2 (受冷或感到冷) feel very cold; freeze; be frostb...
- 法 : Ⅰ名詞1 (由國家制定或認可的行為規則的總稱) law 2 (方法; 方式) way; method; mode; means 3 (標...
- 脫水 : 1 [醫學] (人體液體減少) deprivation of body fluids; dehydration2 [化學] (物質失水分) dehydrat...
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The ratio of isopropyl alcohol and pure water and temperature in the process of freezing are considerated in the research of the preparation of the pt / c electrocatalysts with freeze - drying method. the result shows, when we use 300ml pure water to wash the carbon ( 40mg ) in isopropyl alcohol ( 20ml ) to alter the ratio of isopropyl alcohol and pure water, we get the electrocatalysts with high catalytic activity ; the use of the liquid nitrogen ( - 196 ) to freeze the suspension ( carbon and precursor solution ) can make the pt / c electrocatalysts in high dispersion
採用300ml純水對20ml異丙醇中的40mg碳載體進行洗滌抽濾,來改變預凍液中的醇水比例,通過冷凍乾燥制備pt / c的性能較好;採用液氮對預凍液進行冷凍(預凍溫度為- 196 )制備的pt / c催化劑性能較好;冷凍乾燥法可以有效地避免加熱乾燥過程中前軀體離子在碳載體表面的脫附和團聚,進而制備載量大、分散性好、粒徑較小的pt / c催化劑。
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