CeO as Electron Donor in CoCeO Solid Solution Boosts Alkaline Water Splitting.

Optimizing the electronic structure with increasing intrinsic stability is a usual method to enhance the catalysts' performance. Herein, a series of cerium dioxide (CeO) based solid solution materials is synthesized via substituting Ce atoms with transition metal (Co, Cu, Ni, etc.), in which CoCeO shows optimized band structure because of electron transition in the reaction, namely Co (3d4s) + Ce (4f5d 6s) → Co (3d4s) + Ce (4f5d6s), with more stable electronic configuration.

Failure Analysis of Cracked P110 Repaired Tubing Used for Gas Transmission.

With green and low-carbon developments in oil fields, an increasing amount of repaired oil tubing is being used as oil and gas transmission pipelines in China. However, due to differences in manufacturing standards between oil tubing and transmission pipelines, there are inevitably some issues during their use. This paper investigates a case of cracking failure in repaired oil tubing used as a gathering and transportation pipeline.