神马品牌网台风洛克:请高手帮忙翻译
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2. Experimental
2.1. Catalyst preparation
The technique used to prepare skeletal copper catalystwas based on the methods described in earlier studies [15].A CuAl2 alloy (obtained from Ingot Metals and containing47.8 wt.% Cu) of particle size 210–355 _m was leached ina large excess of 6.1M NaOH solutions at 273 K. After 16 hleaching, the sample was washed in distilled water severaltimes until the pH value was 7, and then stored under 0.1MNa2CO3 solutions. Different amounts (5–25 ml) of 0.1MCr(NO3)3, Co(NO3)2 or Zn(NO3)2 solutions were titratedto the Na2CO3-skeletal copper mixture with careful stirringin order to form well-distributed metal hydroxide depositionson the surface of skeletal copper particles. The mainchemical reactions are as follows:
CO32. + H2O _ OH. + HCO3. (1)
Cr3. + 3OH. → Cr(OH)3 ↓ (2)
Co2. + 2OH. → Co(OH)2 ↓ (3)
Zn2. + 2OH. → Zn(OH)2 ↓ (4)
The liquid/solid mixture was left standing for 3 h, andthen was washed again and stored in distilled water to avoidoxidation.
2.1. Catalyst preparation
The technique used to prepare skeletal copper catalystwas based on the methods described in earlier studies [15].A CuAl2 alloy (obtained from Ingot Metals and containing47.8 wt.% Cu) of particle size 210–355 _m was leached ina large excess of 6.1M NaOH solutions at 273 K. After 16 hleaching, the sample was washed in distilled water severaltimes until the pH value was 7, and then stored under 0.1MNa2CO3 solutions. Different amounts (5–25 ml) of 0.1MCr(NO3)3, Co(NO3)2 or Zn(NO3)2 solutions were titratedto the Na2CO3-skeletal copper mixture with careful stirringin order to form well-distributed metal hydroxide depositionson the surface of skeletal copper particles. The mainchemical reactions are as follows:
CO32. + H2O _ OH. + HCO3. (1)
Cr3. + 3OH. → Cr(OH)3 ↓ (2)
Co2. + 2OH. → Co(OH)2 ↓ (3)
Zn2. + 2OH. → Zn(OH)2 ↓ (4)
The liquid/solid mixture was left standing for 3 h, andthen was washed again and stored in distilled water to avoidoxidation.
2．实验
2．1催化剂的准备
使用于准备骨架铜催化剂的技术居于描述于前面研究（15）的办法。颗粒大小210-355的CuAl2合金（从金属锭获得并且包含47.8 wt.%的铜）在一个超过6.1M NaOH的溶液里沥滤，在273 K。经过16沥滤之后，样品在蒸馏水里洗涤几次直到PH值是7，然后，储存于0.1MNa2CO3的溶液里。0.1MCr(NO3)3, Co(NO3)2 或 Zn(NO3)2溶液的不同数量（5-25ml）通过滴定发来测量Na2CO3-骨架铜混合物，伴随仔细的搅动以便骨架铜粒子的表面均匀分布金属氢氧化物沉淀。主要化学反应如下：
CO32. + H2O _ OH. + HCO3. (1)
Cr3. + 3OH. → Cr(OH)3 ↓ (2)
Co2. + 2OH. → Co(OH)2 ↓ (3)
Zn2. + 2OH. → Zn(OH)2 ↓ (4)
该液体/固体混合物放置保持静止3小时，然后再次洗涤并储存于蒸馏水以防止氧化。
（个别地方翻得不好，特别是专业名词。以上大意翻译供你参考，希望不会误导你~~~）