catalyst; substance that alters reaction rate
Tone colorsmāmámǎmàma
Meanings
1 sense · 5 examplesnoun
substance that changes the rate of a chemical reaction without being consumed or altered itself
technicalIn chemistry, substances that speed up reactions are called positive catalysts (正催化剂); those that slow down reactions are called negative catalysts or inhibitors (负催化剂).
Méi酶
shì是
yī一
zhǒng种
shēng生
wù物
cuī催
huà化
jì剂
。
Enzymes are a type of biological catalyst.
Zhè这
zhǒng种
jīn金
shǔ属
cháng常
yòng用
zuò作
qīng氢
huà化
fǎn反
yìng应
de的
cuī催
huà化
jì剂
。
This metal is often used as a catalyst for hydrogenation reactions.
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Cuī催
huà化
jì剂
běn本
shēn身
zài在
fǎn反
yìng应
jié结
shù束
hòu后
xìng性
zhì质
bù不
biàn变
。
The catalyst itself remains unchanged in properties after the reaction ends.
Yán研
jiū究
rén人
yuán员
zhèng正
zài在
kāi开
fā发
gèng更
gāo高
xiào效
de的
xīn新
xíng型
cuī催
huà化
jì剂
。
Researchers are developing new, more efficient catalysts.
Gōng工
yè业
shàng上
xǔ许
duō多
zhòng重
yào要
guò过
chéng程
dōu都
lí离
bù不
kāi开
cuī催
huà化
jì剂
。
Many important industrial processes rely on catalysts.