24小时热门版块排行榜    

Znn3bq.jpeg
汕头大学海洋科学接受调剂
查看: 504  |  回复: 6

xuh2so4

铁杆木虫 (正式写手)

[交流] 【求助】电解不能发生原因分析 已有5人参与


该反应文献是用银做阴极,含镍不锈钢做阳极,-1.3V电解。发现没产物出现。我用的银网做电极,不锈钢板做阳极。求高人分析分析。
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

小桥.流水.猪

木虫 (知名作家)

·


xuh2so4(金币+1):谢谢参与
电解一般要含有羟基,羧基类似的官能团,这个东西,恐怕很难
永恒的只有信念。
2楼2010-06-01 14:43:22
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xuh2so4

铁杆木虫 (正式写手)

引用回帖:
Originally posted by 小桥.流水.猪 at 2010-06-01 14:43:22:
电解一般要含有羟基,羧基类似的官能团,这个东西,恐怕很难

文献都做到公斤级了,不可能是反应本身的问题文献描述是

4-amino-3,6dichloropyridine-2-carboxylic acid (batch cell)
The cell was a 180 mL beaker (2 in. (5.1 cm) diameter x 4.5 in. (11.4 cm) tall). The silver mesh cathode consisted of a 1 in. (2.5 cm) x 4 in. (10.2 cm) strip placed around the inside wall of the beaker approximately 0.5 in. (1.3 cm) off the bottom and had a 0.5 in. (1.3 cm) wide strip extending out the top of the beaker to which the power supply was attached.

The anode was a 0.75 in. (1.9 cm) diameter x 6 in.

(15.2 cm) long graphite rod that was supported by a rubber stopper in the middle of the beaker and extended to about 0.5 in. (1.3 cm) off the bottom.

The working potential of the cathode was controlled relative to an Ag/AgCl (3.0 M Cl-) reference electrode positioned between the silver mesh and the wall of the beaker.

The silver mesh cathode was activated by anodization at +0.7 volt (v) in a 2% sodium hydroxide and 1% sodium chloride solution in water followed by reverse polarization. After activation, the solution was replaced with a solution of 81 mL of water, 5.1 g (0.0213 moles) of 4-amino-3,5,6-trichloropicolinic acid, and 2.8 g (0.0426 moles) of 85% KOH. After sparging with a slow stream of nitrogen, the electrolysis was carried out at a working potential of -1.3 to-1.35 volts for 2 hours at ambient temperature. The current started at 0.83 amps and gradually decreased to 0.25 amps after the two hours.

A total of 5000 coulombs were passed through the solution (theory for reduction of one chlorine off the pyridine ring is 2050 coulombs). Analysis of the crude product solution by gradient elution HPLC showed the disappearance of the starting material and the appearance of a single peak later identified as 4amino-3,6-dichloropicolinic acid

大家看看我反应有问题吗? 以前没做过电化学,汗
3楼2010-06-01 15:07:36
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

rain27

木虫 (小有名气)


xuh2so4(金币+1):谢谢参与
可能是你电解电位的问题吧。你用恒电位还是恒电流电解的?-1.3V电解是相对于Ag/AgCl嘛?
4楼2010-06-01 16:00:40
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xuh2so4

铁杆木虫 (正式写手)

引用回帖:
Originally posted by rain27 at 2010-06-01 16:00:40:
可能是你电解电位的问题吧。你用恒电位还是恒电流电解的?-1.3V电解是相对于Ag/AgCl嘛?

是用恒电位,就是阴极与参比电极之间的电压是1.3V
5楼2010-06-01 20:08:50
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xuyh_326

木虫 (著名写手)



xuh2so4(金币+1):谢谢参与
引用回帖:
Originally posted by xuh2so4 at 2010-06-01 14:40:17:

该反应文献是用银做阴极,含镍不锈钢做阳极,-1.3V电解。发现没产物出现。我用的银网做电极,不锈钢板做阳极。求高人分析分析。

这个反应我们这里已经做的非常成熟了,如果你是企业的,我们可以帮你做!如果是高校的,哈哈!我们就是同行了!
6楼2010-06-02 12:48:16
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

kmd2005

木虫 (著名写手)

杀虫刹


xuh2so4(金币+1):谢谢参与
注意看一下你的电解电流是多大?
天很蓝``
7楼2010-06-02 13:56:12
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 xuh2so4 的主题更新
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 一志愿厦大生物学332求调剂 +11 池池池池池池 2026-04-08 11/550 2026-04-13 14:10 by 科研论
[考研] 一志愿浙大生物325分求调剂 +9 zysheng 2026-04-12 9/450 2026-04-12 22:31 by yuyin1233
[考研] 调剂 +10 只叙离别辞 2026-04-09 12/600 2026-04-11 20:57 by 逆水乘风
[考研] 调剂求助 +6 果然有我 2026-04-11 7/350 2026-04-11 16:22 by 明月此时有
[考研] 化学308分求调剂 +22 你好明天你好 2026-04-07 24/1200 2026-04-11 11:14 by ChemPharm
[考研] 298求调剂 +5 残荷新柳 2026-04-07 5/250 2026-04-11 11:02 by 紫曦紫棋
[考研] 农学0904 312求调剂 +6 Say Never 2026-04-10 6/300 2026-04-11 10:33 by wwj2530616
[考研] 0854调剂 +8 950824he@ 2026-04-09 8/400 2026-04-11 10:11 by zhq0425
[考研] 293求调剂 +6 勇远库爱314 2026-04-08 6/300 2026-04-11 10:08 by zhq0425
[考研] 0854调剂 +4 长弓傲 2026-04-09 4/200 2026-04-11 09:18 by 猪会飞
[考研] 263能源动力专硕求调剂 +4 加大号饭盒袋 2026-04-10 4/200 2026-04-10 20:52 by gong120082
[考研] 吉大计算机技术331分,英语六级,求调剂 +3 峰峰021116 2026-04-09 3/150 2026-04-10 20:01 by chemisry
[考研] 机械还有还有名额吗?太难了 +6 笑笑袁 2026-04-10 6/300 2026-04-10 11:54 by 高维春
[考研] 求调剂 材料与工程 324分 专硕 +19 翩翩一书生 2026-04-10 21/1050 2026-04-10 11:41 by wp06
[考研] 278求调剂 +27 范婷娜 2026-04-07 31/1550 2026-04-09 20:49 by zhouxiaoyu
[考研] 求调剂材料科学与工程一志愿985初试365分 +5 材化李可 2026-04-08 5/250 2026-04-09 17:00 by Lilly_Li
[论文投稿] 求助文献原文 10+3 18500821399 2026-04-08 3/150 2026-04-09 16:56 by 北京莱茵润色
[考研] 机械工程313分找工科调剂 +3 双一流本科机械 2026-04-08 3/150 2026-04-08 20:41 by 土木硕士招生
[考研] 318求调剂 +5 李青山山山 2026-04-07 5/250 2026-04-07 18:24 by 蓝云思雨
[考研] 085602调剂 初试总分335 +3 19123253302 2026-04-06 3/150 2026-04-07 18:00 by jp9609
信息提示
请填处理意见