催化剂的活性中心位于胶粒表面，催化剂颗粒是无定形的。
The active center lay on the surface of the colloidal particle. The particles were amorphous.
为了测定催化剂颗粒的磨损，可使用三种基本磨损测试装置。
For measuring abrasion of catalyst particles, three basic attrition test apparatus are used.
在纳米螺旋碳纤维中的催化剂颗粒表层，可能有铜的氧化物存在。
There maybe has oxide of copper in the surface of nano copper catalyst particles.
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