| Title | 3D ordered macroporous copper nitride-titanium oxynitride as highly efficient electrocatalysts for universal-pH hydrogen evolution reaction |
| Authors | Wu, Yuchen Ning, Fanghua Wang, Zhiwei Saad, Ali Li, Xiuting Xia, Dingguo |
| Affiliation | Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China Peking Univ, Sch Mat Sci & Engn, Beijing Key Lab Theory & Technol Adv Batteries Ma, Beijing 100871, Peoples R China |
| Keywords | BIFUNCTIONAL ELECTROCATALYSTS ENERGY-CONVERSION METAL NITRIDES NANOWIRE ARRAY ELECTRODE CATALYST HYBRID CARBON ACID PERFORMANCE |
| Issue Date | Jun-2021 |
| Publisher | JOURNAL OF MATERIALS CHEMISTRY A |
| Abstract | The demand for hydrogen for future clean energy has increased research interest in developing non-noble high-efficiency electrocatalysts for the hydrogen evolution reaction (HER). In this study, we prepared a copper nitride-loaded 3D ordered macroporous titanium oxynitride (Cu3N@3DOM-TiOxNy) via PS-metal sol-gel and ammonia annealing method. The present Cu3N@3DOM-TiOxNy as an electrocatalyst demonstrated high efficiency towards the HER, with low overpotentials ranging from 71 to 79 mV at a current density of 10 mA cm(-2) in all-pH electrolyte. Additionally, the low Tafel slopes of the Cu3N@3DOM-TiOxNy revealed the fast electron transfer in the electrocatalytic process. In-depth investigation illustrated that the Cu3N with an extremely low activation barrier energy associated with rapid H-2 release process works as the main active site and plays a pivotal role in efficiently electrocatalysing the HER. This work not only proposes a highly efficient, robust and low-cost copper-based all-pH HER electrocatalyst, but also demonstrates the significance of nano-engineering in developing next-generation electrocatalysts. |
| URI | http://hdl.handle.net/20.500.11897/617808 |
| ISSN | 2050-7488 |
| DOI | 10.1039/d1ta02457d |
| Indexed | SCI(E) |
| Appears in Collections: | 数学科学学院 先进电池材料料理论与技术北京市重点实验室 |
