1. Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen University Xiamen 361005 China
2. State Key Laboratory of CatalysisCollaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of Sciences Dalian 116023 China
3. State Key Laboratory of Coal ConversionInstitute of Coal ChemistryChinese Academy of Sciences Taiyuan 030001 China
4. Center for High Resolution Electron MicroscopyCollege of Materials Science and EngineeringHunan University Changsha 410082 China