What is the Difference Between Positive and Negative Catalyst

Thekey difference between positive and negativecatalyst是阳性催化剂是能够增加的物质reaction rate,而负催化剂是物质re capable of decreasing the reaction rate.

A positive catalyst is a substance that can increase the rate of reaction without getting involved or consumed in the reaction process. A negative catalyst, on the other hand, is a substance that can decrease the rate of reaction without getting consumed during the reaction.

1.Overview and Key Difference
2.What is a Positive Catalyst
3.什么是负催化剂
4.Positive vs Negative Catalyst in Tabular Form
5.摘要 - 正与负催化剂

What is a Catalyst?

A catalyst is a chemical compound that can increase the rate of a reaction without itself being consumed. This compound can continue to act repeatedly in a chemical reaction. Basically, there are four types of catalysts:homogenous catalysts, heterogeneous catalysts, heterogenized homogenous catalysts, and biocatalysts.

We can also categorize them as positive and negative catalysts according to their effect on the rate of the chemical reaction.

What is a Positive Catalyst?

A positive catalyst can be described as a substance that can increase the rate of reaction without getting involved or consumed in the reaction process. These substances can increase the reaction rate or the reaction speed by lowering the chemical reaction’sactivation energy。在锰二氧化催化剂（MNO）存在下氯酸钾的分解₂) is an example of this type of positive catalyst.

Positive vs Negative Catalyst in Tabular Form

Figure 01: Catalysis Reaction Progress

Since positive catalysts can increase the reaction rate, they can also increase the yield of a chemical reaction. Increasing the reaction rate causes an increase of product given by the reaction per unit time.

什么是负催化剂?

阴性催化剂可以描述为可以降低反应速率而不会在反应过程中消耗的物质。有时，化学反应可能会因称为阴性催化剂的外来物质而阻碍。这种类型的催化剂的一个例子是磷酸，它是降低过氧化氢分解速率的负催化剂。此外，我们可以说酒精也能够充当负催化剂。

Moreover, negative catalysts can decrease the yield of a chemical reaction because they can decrease the reaction rate. Decreasing the reaction rate causes the reduction of the product given by the reaction per unit time.

What is the Difference Between Positive and Negative Catalyst?

Basically, there are four types of catalysts: homogenous catalysts, heterogeneous catalysts, heterogenized homogenous catalysts, and biocatalysts. However, there can be positive and negative catalysts as well, according to the catalyst’s effect on the rate of reaction. The key difference between positive and negative catalyst is that positive catalysts are substances that are capable of increasing the reaction rate, whereas negative catalysts are substances that are capable of decreasing the reaction rate. A positive catalyst works by lowering the activation energy to speed up the reaction; however, a negative catalyst cannot lower the activation energy, so the reaction rate is decreased.

The below infographic presents the differences between positive and negative catalyst in tabular form for side by side comparison。