Yang, FanDong, GuohuaMeng, LijianLiu, LinaLiu, XiangcunZhang, ZhuanfangZhao, MingZhang, Wenzhi2024-07-012024-07-012024Fan Yang, Guohua Dong, Lijian Meng, Lina Liu, Xiangcun Liu, Zhuanfang Zhang, Ming Zhao, Wenzhi Zhang, One-step electrodeposition of bifunctional MnCoPi electrocatalysts with wrinkled globular-flowers-like structure for highly efficient electrocatalytic water splitting, International Journal of Hydrogen Energy, Volume 77, 2024, Pages 589-597, ISSN 0360-3199, https://doi.org/10.1016/j.ijhydene.2024.06.2351879-34870360-3199http://hdl.handle.net/10400.22/25721This work was supported by National Natural Science Foundation of China (Grant No. 32272823), the Research Foundation of Education Bureau of Heilongjiang Province of China (Grant No. 145309315) and the Plant Food Processing Technology Advantages Characteristic Discipline “Science and Technology Research” Special Project in Heilongjiang Province (YSTSXK202309).The development and exploration of electrocatalysts with the high reactive and abundant availability is still extremely crucial in electrocatalytic overall water splitting. Herein, a novel globular-flowers-like MnO2/Co3(PO4)2 (denoted as MnCoPi) electrocatalyst on nickel foam was successfully prepared through a simple one-step electrodeposition method. The MnCoPi electrocatalyst simultaneously delivers remarkable electrocatalytic activities for hydrogen evolution reaction (HER) with overpotentials (η10) reaching 102 mV and oxygen evolution reaction (OER) with overpotentials (η10) up to 225 mV in 1 M KOH solution. Furthermore, the assembled electrolyzer cell utilizing MnCoPi as the cathode and anode only requires a low voltage of 1.55 V to achieve a current density of 10 mA cm−2. Moreover, the developed MnCoPi electrocatalyst shows excellent stability during continuous operation for 48 h in OER, HER and overall water splitting process. Compared with the pristine MnO2, the significant electrocatalytic properties of MnCoPi can mainly be attributed to the improved physicochemical properties such as distinctive globular-flowers-like morphology, huge specific surface areas and abundant porosity structure, low electrochemical resistance, especially for the formed heterojunction between MnO2 and Co3(PO4)2, which can provide abundant reactive sites and accelerated electron transfer, etc. Consequently, this work provides a new avenue for the development of efficient and stable bifunctional electrocatalysts for overall water splitting.engElectrocatalyticHydrogen Eevolution Reaction (HER)Oxygen Evolution Reaction (OER)Hydrogen productionWater splittingMnCoPi catalystjournal article10.1016/j.ijhydene.2024.06.235