The citation style for New Carbon Materials is typically based on the Elsevier Harvard style. If it's not in Mendeley, you can manually create it or use a similar Elsevier style and adjust it as needed by referring to the journal's guidelines.

Dear Peter Oluwasegun Igunnu ,

thank you for your reply. Elsevier Harvard style is not the same as New carbon materials citation style, however the close match one is China National Standard GB/T 7714-2015 (numeric, 中文) with some additional manual adjustment.